Judge Profile

Kristina M. Kalan

58 IP cases indexed. Covers patent matters.

Cases Presided Over

58 cases indexed | Page 1 of 2

patent instituted · Dec 4, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00816

ClearCorrect Operating challenged Align Technology's dental treatment planning patent (11,369,456 B2) before the PTAB. The Board found a reasonable likelihood of prevailing on Ground 1, based on obviousness over Chishti-511, Chishti-876, and Sachdeva.

patent denied · Dec 4, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00815

ClearCorrect Operating lost its IPR challenge against Align Technology's '879 patent in a PTAB decision focused on obviousness. The Board rejected the petitioner’s argument that combining prior art references would render the claims obvious, upholding the validity of the challenged technology in orthodontics.

patent denied · Dec 4, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00814

ClearCorrect Operating lost its IPR challenge against Align Technology regarding dental treatment planning technology. The PTAB ruled that the claimed obviousness over prior art was not demonstrated, upholding the validity of the patent claims.

patent terminated or settled · Nov 2, 2025

Berkshire Hathaway Energy Company et al. v.MES, Inc.

· IPR2025-00423

The PTAB terminated the IPR against MidAmerican Energy Company after a settlement with BirchTech Corp., while the case continues for Berkshire Hathaway Energy and Pacificorp.

patent terminated or settled · Nov 2, 2025

Berkshire Hathaway Energy Company et al. v.MES, Inc.

· IPR2025-00422

The IPR against BirchTech’s patent was terminated for MidAmerican Energy Company after a settlement, while the proceeding remains open for Berkshire Hathaway Energy and PacificCorp.

patent terminated or settled · Nov 2, 2025

Berkshire Hathaway Energy Company et al. v.MES, Inc.

· IPR2025-00422

The PTAB granted a joint motion to terminate the IPR as to WEC Energy Group after the parties settled their dispute over Patent 10,668,430. The termination does not affect the remaining petitioners, and the proceeding continues against them.

patent terminated or settled · Nov 2, 2025

Berkshire Hathaway Energy Company et al. v.MES, Inc.

· IPR2025-00422

Berkshire Hathaway Energy and its affiliates settled an IPR against BirchTech, leading the Board to terminate the proceeding for two petitioners while keeping the case open for the remaining parties. The settlement agreement was treated as business‑confidential information.

patent terminated or settled · Nov 2, 2025

Berkshire Hathaway Energy Company et al. v.MES, Inc.

· IPR2025-00423

Berkshire Hathaway Energy’s power subsidiaries settled with Birchtech, leading the PTAB to terminate the IPR as to those petitioners while the case remains open for the remaining parties. The settlement agreement was deemed business‑confidential.

patent instituted · Nov 2, 2025

Berkshire Hathaway Energy Company et al. v.MES, Inc.

· IPR2025-00423

Berkshire Hathaway Energy et al. successfully petitioned to institute IPR against Birchtech Corp.'s patent (10668430) covering mercury removal from flue gas. The Board found Petitioners established a reasonable likelihood of prevailing on grounds of obviousness and anticipation.

patent instituted · Nov 2, 2025

Berkshire Hathaway Energy Company et al. v.MES, Inc.

· IPR2025-00422

The PTAB institution decision found a reasonable likelihood of prevailing for the Petitioners regarding claims covering flue gas pollutant removal. The Board addressed both anticipation and obviousness grounds, concluding that the combination of prior art references was sufficiently motivated to render the asserted claims unpatentable.

patent terminated or settled · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00717

The Board terminated the IPR against MidAmerican Energy Company after the parties settled, but the case continues against PacifiCorp.

patent terminated or settled · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00718

The PTAB terminated the IPRs against MidAmerican Energy Company after a settlement with BirchTech, leaving the case open only against PacifiCorp.

patent terminated or settled · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00717

Utility companies and BirchTech settled multiple IPRs covering power‑grid patents. The Board treated the settlement agreements as confidential and terminated the IPRs as to the settling petitioners, leaving the remaining petitioners in the proceeding.

patent terminated or settled · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00718

The Board granted a joint request to treat settlement agreements as business‑confidential and terminated the IPRs for Interstate Power & Light and Wisconsin Power & Light after the parties settled. Remaining petitioners’ IPRs continue.

patent denied · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00718

The PTAB denied institution of an IPR for a mercury removal patent (10926218) after the Director remanded the case due to multiple concurrent petitions. The denial was based on following the Director's instruction to prioritize one petition over another.

patent instituted · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00718

PacifiCorp et al. successfully convinced the PTAB to institute IPR proceedings against MES, Inc.'s patent (10926218) regarding pollutant removal from flue gas. The Board found a reasonable likelihood of prevailing on both anticipation and obviousness grounds based on multiple prior art references.

patent instituted · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00717

PacifiCorp successfully challenged 26 claims of Birchtech Corp.'s patent (10926218) related to flue gas desulfurization, leading the PTAB to find a reasonable likelihood of prevailing on at least one claim. The Board concluded that combining prior art references was an obvious application of known techniques in mercury removal technology.

patent instituted · Aug 4, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00717

The PTAB institution decision found that the Petitioner successfully established a reasonable likelihood of prevailing on multiple claims against Birchtech Corp.'s patent. The grounds for unpatentability centered on obviousness (103) based on combining prior art related to pollutant removal from flue gas.

patent all challenged claims upheld · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00821

The PTAB affirmed Align Technology’s patent on a dual‑shell dental sheet composition, finding none of the challenged claims unpatentable after a detailed obviousness analysis involving Hinz, Durasoft data sheets, and Sun.

patent all challenged claims upheld · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00820

The PTAB affirmed all claims of Align Technology’s ‘630 patent after finding ClearCorrect’s obviousness arguments unpersuasive. No claim was deemed unpatentable.

patent all challenged claims upheld · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00819

The PTAB affirmed Align Technology’s patent on a multilayer dental sheet composition, finding none of the ClearCorrect‑challenged claims unpatentable.

patent all challenged claims upheld · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00818

The PTAB affirmed all claims of Align Technology’s ‘630 patent after finding ClearCorrect’s obviousness arguments unpersuasive. No claims were deemed unpatentable.

patent instituted · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00821

ClearCorrect Operating successfully convinced the PTAB to institute review on all claims, arguing that Align Technology's dental aligner patents are obvious under 35 U.S.C. §102 and §103. The Board accepted the petitioner's arguments regarding material substitutions (Tritan for polycarbonate) and combining prior art references into a multilayer device.

patent instituted · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00819

ClearCorrect Operating successfully instituted the IPR against Align Technology's dental appliance patent by demonstrating a reasonable likelihood of prevailing on multiple grounds. The Board found sufficient motivation in prior art references to combine them and support the claims under Section 103.

patent instituted · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00820

The PTAB granted institution of IPR for ClearCorrect against Align Technology regarding a dental aligner patent (11,648,090). The Board found sufficient evidence that the challenged claims would be obvious over prior art references.

patent instituted · Apr 14, 2025

ClearCorrect Operating, LLC et al. v.Align Technology, Inc.

· IPR2025-00818

The PTAB decided to institute the IPR proceedings against Align Technology's patent (10973613) after Petitioner ClearCorrect demonstrated a reasonable likelihood of prevailing. The Board found that combining prior art references like Tadros, Kalili, and Texin 990R was motivated by POSITA with reasonable expectation of success.

patent terminated or settled · Apr 3, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00424

Utility affiliates of Berkshire Hathaway Energy settled multiple PTAB IPRs, leading to the termination of the cases for the settling parties while the Board kept the proceedings open for the remaining petitioners.

patent terminated or settled · Apr 3, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00425

Energy utilities settled their PTAB disputes with BirchTech, prompting the Board to terminate the IPRs for the settling parties and keep the settlement agreements confidential. Remaining petitioners stay in the proceeding.

patent instituted · Apr 3, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00425

The Board instituted the IPR petition against Patent No. 10589225, finding a reasonable likelihood of prevailing on multiple grounds. The institution decision addressed complex issues regarding real party in interest and written description support for genus claims related to flue gas treatment.

patent instituted · Apr 3, 2025

PacifiCorp et al. v.MES, Inc.

· IPR2025-00424

The PTAB granted institution for an IPR challenging claims related to mercury removal from flue gas using activated carbon sorbents. The Board found the Petitioner met a reasonable likelihood of prevailing standard, despite disputes over prior art reduction to practice.

Arctic Invent — IP Strategy

Facing a similar IP matter?

Arctic Invent is a specialist IP firm with deep litigation expertise across India, EU, US, and UK. Our team uses data-driven strategy to build stronger cases.

Consult our team →