Microsoft Corporation vs. Qomplx LLC

Explore the PTAB proceeding IPR2026-00298 filed by Microsoft Corporation on 2026-03-18. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2026-00298

Filing Date

2026-03-18

Accorded Filing Date

2026-03-18

Institution Decision Date

2026-07-28

Last Modified Date

2026-09-25

Proceeding Type

IPR

Termination Date

—

Trial Status

Trial Instituted

Parties & Counsel

Petitioner

Microsoft Corporation

Represented By

Mason, Andrewet al

Patent Owner / Respondent

Qomplx LLC

Represented By

WEATHERWAX, KENNETHet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 2400 - Computer Networks, Multiplex & Cybersecurity

Patent Information

1 Patent Involved

Respondent Application Number 18779029

Respondent Patent Number 12143424

External Links

Espacenet

Google Patents

Respondent Inventor Jason Crabtree et al

Respondent Tech Center TC 2400 - Computer Networks, Multiplex & Cybersecurity

Address and Attorney/Agent Information

10 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name NK Patent Law

Customer Number 115007

Address 4101 Lake Boone Trail, Suite 218, Raleigh, NC, 27607, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
39151	Christopher Cook	513-307-8268
44141	Andrew Hagerty	513-983-3762
56748	Wesley Sheffield	3217288444
59389	Justin Nifong	919-348-2194
65727	Douglas Meier	919-348-2194
68963	Aniruddha Agrawal	919-348-2194
69606	Cameron Applegate	919-348-2194
72169	Gregory Evans	919-348-2194
72576	Randolph Tucker	919-348-2194
78623	Taylor Langley	919-246-3955

Proceeding Documents

Institution decision and grant of joinder, IPR2026-00363 NOTICE

2026-10-19 FILING PARTY: BOARD

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Notice of Deposition of Mark Crovella, Ph.D. NOTICE

2026-09-25 FILING PARTY: PATENT OWNER

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Notice of Stipulation to Modify Due Dates NOTICE

2026-09-09 FILING PARTY: PATENT OWNER

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Petitioner's Objections To Patent Owner's Evidence OTHER

2026-08-11 FILING PARTY: PETITIONER

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Patent Owner's Objections to Petitioner's Evidence OTHER

2026-08-11 FILING PARTY: PATENT OWNER

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Microsoft Corporation vs. Qomplx LLC

Proceeding Overview

Parties & Counsel

Petitioner

Microsoft Corporation

Represented By

Patent Owner / Respondent

Qomplx LLC

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Institution decision and grant of joinder, IPR2026-00363 NOTICE

Notice of Deposition of Mark Crovella, Ph.D. NOTICE

Notice of Stipulation to Modify Due Dates NOTICE

Petitioner's Objections To Patent Owner's Evidence OTHER

Patent Owner's Objections to Petitioner's Evidence OTHER

Order: Scheduling Order ORDER

Institution Decision: Grant DECISION

Patent Owner's Preliminary Sur-Reply OTHER

Petitioner’s Reply To Patent Owner’s Preliminary Response (“POPR”) OTHER

Patent Owner's Updated Mandatory Notices NOTICE

Email Correspondence Exhibit

Notice of Intent to Designate Colette Woo as Back-Up Counsel NOTICE

Notice of Intent to Designate Dennis Courtney as Back-Up Counsel NOTICE

Ex. 2004 Courtney Declaration In Support of Notice of Intent Exhibit

Ex. 2002 Lowenstein Declaration In Support of Notice of Intent Exhibit

Ex. 2003 Woo Declaration In Support of Notice of Intent Exhibit

Notice of Intent to Designate Nathan Lowenstein as Back-Up Counsel NOTICE

Ex. 2001 - Malek Declaration Exhibit

Patent Owner's Preliminary Response POPR

Petitioner's Updated Exhibit List NOTICE

Sotera Plus Stipulation Exhibit

Notice: Notice of Filing Date Accorded NOTICE

Patent Owner's Mandatory Notice NOTICE

Patent Owner's Power of Attorney NOTICE

Def Prelim Claim Constructions, Qomplx LLC v. Microsoft Corp., Exhibit

U.S. Patent No. 8,560,527 Exhibit

Scott Schneider, et al., Tutorial: Stream Processing Optimizations (2013) Exhibit

Thomas Heinze, et al., Cloud-based Data Stream Processing (May 2014) Exhibit

Ankit Toshniwal, et al., Storm @Twitter (2014) Exhibit

Declaration of Mark Crovella dated March 16, 2026 Exhibit

Rapolu, Dynamic Re-Optimization Tech for Stream Proc Engines & Object Store Exhibit

Plf Prelim Discl of Prop Claim Construction, Qomplx LLC v. Microsoft Corp. Exhibit

U.S. Patent No. 8,190,960 Exhibit

U.S. Patent Application Pub. No. 2014/0059185 A1 Exhibit

U.S. Provisional Application No. 62/132,686 Exhibit

Leonardo Neumeyer, et al., S4: Distributed Stream Computing Platform (2010 Exhibit

U.S. Patent No. 8,407,360 Exhibit

Power of Attorney of Microsoft Corporation NOTICE

U.S. Patent Application Pub. No. 2016/0269247 A1 Exhibit

List of Challenged Claims Exhibit

Michael Duller, et al., Virtualizing Stream Processing (2011) Exhibit

Soroudi, et al., High Availability on a Distributed Real Time Proc Sys Exhibit

Petition for Inter Partes Review of U.S. Patent No. 12,143,424 PETITION

U.S. Patent No. 8,732,300 Exhibit

File History of U.S. Patent No. 12,143,424 Exhibit

U.S. Patent No. 12,143,424 Exhibit