Maintenance fees coming due

Element Energy, Inc.

7 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Nov 30, 2026. Unpaid by Jun 1, 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 11,664,670	Methods and Systems for Updating State of Charge Estimates of Individual Cells in Battery Packs Element Energy, Inc. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Aug 21, 2042 · High confidence	Element Energy, Inc.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Aug 21, 2042	High confidence
US 11,692,956	Methods and Systems for In-Situ Impedance Spectroscopy Analysis of Battery Cells in Multi-Cell Battery Packs Element Energy, Inc. In force Fee due Jan 4, 2027 Lapses if unpaid Jul 6, 2027 Term ends Aug 18, 2040 · High confidence	Element Energy, Inc.	In force	Jan 4, 2027	Jul 6, 2027	Term ends Aug 18, 2040	High confidence
US 11,698,416	Methods and Systems for In-Situ Leakage Current Testing of Cells in Multi-Cell Battery Packs Element Energy, Inc. In force Fee due Jan 11, 2027 Lapses if unpaid Jul 12, 2027 Term ends Aug 18, 2040 · High confidence	Element Energy, Inc.	In force	Jan 11, 2027	Jul 12, 2027	Term ends Aug 18, 2040	High confidence
US 11,699,909	Controllers for Managing a Plurality of Stacks of Electrochemical Cells, and Associated Methods Element Energy, Inc. In force Fee due Jan 11, 2027 Lapses if unpaid Jul 12, 2027 Term ends Feb 9, 2042 · High confidence	Element Energy, Inc.	In force	Jan 11, 2027	Jul 12, 2027	Term ends Feb 9, 2042	High confidence
US 11,735,934	Safe Battery Energy Management Systems, Battery Management System Nodes, and Methods Element Energy, Inc. In force Fee due Feb 22, 2027 Lapses if unpaid Aug 23, 2027 Term ends Oct 8, 2040 · High confidence	Element Energy, Inc.	In force	Feb 22, 2027	Aug 23, 2027	Term ends Oct 8, 2040	High confidence
US 11,791,642	Safe Battery Energy Management Systems, Battery Management System Nodes, and Methods Element Energy, Inc. In force Fee due Apr 17, 2027 Lapses if unpaid Oct 18, 2027 Term ends Nov 28, 2040 · Medium confidence	Element Energy, Inc.	In force	Apr 17, 2027	Oct 18, 2027	Term ends Nov 28, 2040	Medium confidence
US 11,831,192	Battery Management Controllers and Associated Methods Element Energy, Inc. In force Fee due May 28, 2027 Lapses if unpaid Nov 29, 2027 Term ends Jan 28, 2042 · High confidence	Element Energy, Inc.	In force	May 28, 2027	Nov 29, 2027	Term ends Jan 28, 2042	High confidence

7 of 7 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.