Maintenance fees coming due

A123 Systems LLC

16 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Nov 16, 2026. Unpaid by May 17, 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 11,652,207	High Power Electrode Materials A123 Systems LLC In force Fee due Nov 16, 2026 Lapses if unpaid May 17, 2027 Term ends Nov 26, 2031 · High confidence	A123 Systems LLC	In force	Nov 16, 2026	May 17, 2027	Term ends Nov 26, 2031	High confidence
US 9,035,610	System and Method for Controlling Output of a Battery Pack A123 Systems LLC In force Fee due Nov 19, 2026 Lapses if unpaid May 19, 2027 Term ends Feb 19, 2032 · High confidence	A123 Systems LLC	In force	Nov 19, 2026	May 19, 2027	Term ends Feb 19, 2032	High confidence
US 10,305,104	Li-Ion Battery Cathode Materials with Over-Discharge Protection A123 Systems LLC In force Fee due Nov 28, 2026 Lapses if unpaid May 28, 2027 Term ends May 3, 2035 · High confidence	A123 Systems LLC	In force	Nov 28, 2026	May 28, 2027	Term ends May 3, 2035	High confidence
US 11,670,938	Protection Circuit for Battery Management System A123 Systems, LLC In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 Term ends Oct 13, 2041 · High confidence	A123 Systems, LLC	In force	Dec 6, 2026	Jun 7, 2027	Term ends Oct 13, 2041	High confidence
US 11,682,758	Process for Metallization of Electrochemically Active Powders A123 Systems LLC In force Fee due Dec 20, 2026 Lapses if unpaid Jun 21, 2027 Term ends Oct 14, 2039 · High confidence	A123 Systems LLC	In force	Dec 20, 2026	Jun 21, 2027	Term ends Oct 14, 2039	High confidence
US 11,769,882	Multi-Layered Coated Electrode for Lithium-Ion Battery A123 Systems, LLC In force Fee due Mar 26, 2027 Lapses if unpaid Sep 27, 2027 Term ends Nov 18, 2041 · High confidence	A123 Systems, LLC	In force	Mar 26, 2027	Sep 27, 2027	Term ends Nov 18, 2041	High confidence
US 9,157,967	System and Method for Assessing Voltage Threshold Detecting Circuitry Within a Battery Pack A123 Systems LLC In force Fee due Apr 13, 2027 Lapses if unpaid Oct 13, 2027 Term ends Apr 27, 2032 · High confidence	A123 Systems LLC	In force	Apr 13, 2027	Oct 13, 2027	Term ends Apr 27, 2032	High confidence
US 9,160,190	System and Method for Assessing ADC Operation and Voltage of a Battery Pack A123 Systems LLC In force Fee due Apr 13, 2027 Lapses if unpaid Oct 13, 2027 Term ends May 14, 2032 · High confidence	A123 Systems LLC	In force	Apr 13, 2027	Oct 13, 2027	Term ends May 14, 2032	High confidence
US 9,174,846	Ferric Phosphate and Methods of Preparation Thereof A123 Systems LLC In force Fee due May 3, 2027 Lapses if unpaid Nov 3, 2027 Term ends Aug 24, 2032 · High confidence	A123 Systems LLC	In force	May 3, 2027	Nov 3, 2027	Term ends Aug 24, 2032	High confidence
US 9,178,215	Mixed Metal Olivine Electrode Materials for Lithium Ion Batteries Having Improved Specific Capacity and Energy Density A123 Systems LLC In force Fee due May 3, 2027 Lapses if unpaid Nov 3, 2027 Term ends Aug 8, 2031 · High confidence	A123 Systems LLC	In force	May 3, 2027	Nov 3, 2027	Term ends Aug 8, 2031	High confidence
6 more maintenance fees coming due in the 12 months from Nov 15, 2026 · Pro

10 of 16 patents shown. Soonest fee due date first, then patent number.

Pro members see every patent with a maintenance fee coming due: number, title, status, the due date, and the date it lapses if the fee goes unpaid through the grace period.

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