Maintenance fees coming due

Flexgen Power Systems, LLC

9 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Apr 24, 2027. Unpaid by Oct 25, 2027, that one lapses early.

A maintenance fee does not end a patent on its due date. It falls due at 3.5, 7.5 and 11.5 years from grant, and the patent lapses only if the fee is still unpaid at the end of the six month grace period that follows.

Patent	Title	Holder	Status	Fee due	Lapses if unpaid	Expires	Confidence
US 11,799,137	Enhanced Switched Balancing Network for Battery Pack Flexgen Power Systems, LLC In force Fee due Apr 24, 2027 Lapses if unpaid Oct 25, 2027 Term ends Jan 16, 2039 · High confidence	Flexgen Power Systems, LLC	In force	Apr 24, 2027	Oct 25, 2027	Term ends Jan 16, 2039	High confidence
US 9,168,836	Non-Traction Battery Controller and Applications Thereof Flexgen Power Systems, LLC In force Fee due Apr 27, 2027 Lapses if unpaid Oct 27, 2027 Term ends Jan 27, 2034 · High confidence	Flexgen Power Systems, LLC	In force	Apr 27, 2027	Oct 27, 2027	Term ends Jan 27, 2034	High confidence
US 11,843,278	Microgrid Power System Flexgen Power Systems, LLC In force Fee due Jun 12, 2027 Lapses if unpaid Dec 13, 2027 Term ends Jun 6, 2039 · High confidence	Flexgen Power Systems, LLC	In force	Jun 12, 2027	Dec 13, 2027	Term ends Jun 6, 2039	High confidence
US 10,536,007	Battery Energy Storage System and Control System and Applications Thereof Flexgen Power Systems, LLC In force Fee due Jul 14, 2027 Lapses if unpaid Jan 14, 2028 Term ends Apr 21, 2031 · High confidence	Flexgen Power Systems, LLC	In force	Jul 14, 2027	Jan 14, 2028	Term ends Apr 21, 2031	High confidence
US 9,251,947	Liquid Cooling Arrangement of an Inductive Component and a Method for Manufacturing an Inductive Component Flexgen Power Systems, LLC In force Fee due Aug 2, 2027 Lapses if unpaid Feb 2, 2028 Term ends Jan 8, 2032 · High confidence	Flexgen Power Systems, LLC	In force	Aug 2, 2027	Feb 2, 2028	Term ends Jan 8, 2032	High confidence
US 10,574,055	Transient Power Stabilization Device with Active and Reactive Power Control Flexgen Power Systems, LLC In force Fee due Aug 25, 2027 Lapses if unpaid Feb 25, 2028 Term ends May 22, 2036 · High confidence	Flexgen Power Systems, LLC	In force	Aug 25, 2027	Feb 25, 2028	Term ends May 22, 2036	High confidence
US 10,615,597	Grid Power Supply Apparatus and Methods Using Energy Storage for Transient Stabilization Flexgen Power Systems, Inc. In force Fee due Oct 7, 2027 Lapses if unpaid Apr 7, 2028 Term ends Jul 13, 2033 · High confidence	Flexgen Power Systems, Inc.	In force	Oct 7, 2027	Apr 7, 2028	Term ends Jul 13, 2033	High confidence
US 9,312,699	Island Grid Power Supply Apparatus and Methods Using Energy Storage for Transient Stabilization Flexgen Power Systems, LLC In force Fee due Oct 12, 2027 Lapses if unpaid Apr 12, 2028 Term ends Jul 11, 2034 · High confidence	Flexgen Power Systems, LLC	In force	Oct 12, 2027	Apr 12, 2028	Term ends Jul 11, 2034	High confidence
US 9,331,497	Electrical Energy Storage Unit and Control System and Applications Thereof Flexgen Power Systems, LLC In force Fee due Nov 3, 2027 Lapses if unpaid May 3, 2028 Term ends Aug 5, 2031 · High confidence	Flexgen Power Systems, LLC	In force	Nov 3, 2027	May 3, 2028	Term ends Aug 5, 2031	High confidence

9 of 9 patents shown. Soonest fee due date first, then patent number.

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.