90/016,688HYDROSTATIC DRIVE SYSTEM9,347,554Open

Status

Reexam Preprocessing Completed - Released to Assigned GAU

Filed

Oct 23, 2026

Pre-Order Paper

Window open until about Dec 2, 2026

Last Updated

Oct 29, 2026

Examiner

Not assigned

Art Unit

3993

Requester

Not named (filed by counsel)

Requester Law Firm

Fish & Richardson P.C.

Requested By

Third Party

Patent Owner(via USPTO assignment records)

Caterpillar Inc.

Patent Owner Law Firm

Owner hasn't filed yet

Sector (CPC)

FMechanical Engineering
F16Machine Elements
F16HGearings

USPC

Unknown

Reexam History (14 events)

Oct 29, 2026RXPCOMCompletion of Preprocessing - Released to Assigned GAU
Oct 29, 2026FTFIFITF set to NO - revise initial setting
Oct 29, 2026RXNREQFDNotice of reexamination request filing date
Oct 29, 2026RXNREQAUNotice of assignment of reexamination request
Oct 28, 2026RXTTLRPTTitle Report
Oct 23, 2026RXC/SRCertificate of Service
Oct 23, 2026RXOSUB.RReexamination requested by third party requester
Oct 23, 2026PRXRParalegal Reexam Review Complete
Oct 23, 2026RXOSUBReceipt of Original Ex Parte Reexam Request
Oct 23, 2026BIG.Entity Status Set To Undiscounted (Initial Default Setting or Status Change)
Oct 23, 2026RXRLFReExam Litigation Found
Oct 23, 2026RXLITSRReexam Litigation Search Conducted
Oct 23, 2026RXIDS.RReexam - Information Disclosure Statement Filed by Third Party Requester
Oct 23, 2026RXAF/DRReexam - Affidavit(s), Declaration(s) and/or Exhibit(s) Filed by Third Party Requester

Prosecution, PTAB & CAFC

PTAB Proceedings (IPR, PGR, CBM, DER)

None found

Federal Circuit (CAFC)

None found

Terminal Disclaimer

None found

Prosecution History

None found

Maintenance Fees

Grant
May 24, 2016
3.5-yr
Nov 24, 2019
Paid Oct 23, 2019
7.5-yr
Nov 24, 2023
Paid Oct 19, 2023
11.5-yr
Nov 24, 2027
Expiry
Sep 21, 2034

Entity Status

Large Entity

Expires

Sep 21, 2034 (7.9 yr remaining)

Term Adjustment

+556 days (~1.5 yr)

Assignments

Mar 2013Apr 2013FiledCARL MOBERGCORWIN E. STORERRUSTIN G. METZGERPAUL A. DVORAKCATERPILLAR INC.
AssignmentReel/Frame: 029992/0421Recorded: Mar 14, 2013

From

PAUL A. DVORAKInventor
Mar 6, 2013
RUSTIN G. METZGERInventor
Mar 5, 2013
CARL MOBERGInventor
Feb 25, 2013
CORWIN E. STORERInventor
Feb 25, 2013
→

To

CATERPILLAR INC.