A123 Systems LLC
19 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 3 name spellings.
25
Ending by 2030
May 2027
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 3 fees due Nov 16 to 28, 2026 · next Nov 16
- 2 fees due Dec 6 to 20, 2026 · next Dec 6
- 1 fee due Mar 26, 2027The maintenance fee for Multi-Layered Coated Electrode for Lithium-Ion Battery (US 11,769,882) comes due Mar 26, 2027. Unpaid by Sep 27, 2027, it lapses early.
- 2 fees due Apr 13, 2027
- 2 fees due May 3, 2027
- 2 fees due Jun 3 to 30, 2027 · next Jun 3
- 1 fee due Jul 23, 2027The maintenance fee for Reverse Bias Protection Circuit for a Vehicle Battery System (US 11,881,707) comes due Jul 23, 2027. Unpaid by Jan 24, 2028, it lapses early.
- 1 fee due Aug 27, 2027The maintenance fee for Nanoscale Pore Structure Cathode for High Power Applications and Material Synthesis Methods (US 11,916,185) comes due Aug 27, 2027. Unpaid by Feb 28, 2028, it lapses early.
- 2 fees due Sep 29, 2027
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
- 1 term has ended since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,067,112 | Stacked Lithium Secondary Battery and Its Fabrication Utilizing a Folded Configuration In force · High confidence | In force | High confidence | |
| US 7,879,493 | Alkali Metal Titanates and Methods for Their Synthesis In force · High confidence | In force | High confidence | |
| US 8,323,831 | Nanocomposite Electrodes and Related Devices In force · High confidence | In force | High confidence | |
| US 7,723,955 | Method and System for Monitoring and Balancing Cells in Battery Packs Utilizing Optically Coupled Cell Voltage Selection Signal, Cell Voltage Isolation Amplifier, and Zener Diodes in Balancing Circuit In force · High confidence | In force | High confidence | |
| US 9,923,180 | Separator Including Electroactive Material for Overcharge Protection In force · High confidence | In force | High confidence | |
| US 9,509,019 | Multifunctional Mixed Metal Olivines for Lithium Ion Batteries In force · High confidence | In force | High confidence | |
| US 9,728,759 | Separator for Electrochemical Cell and Method for Its Manufacture In force · High confidence | In force | High confidence | |
| US 8,541,122 | Lithium Rechargeable Cell with Reference Electrode for State of Health Monitoring In force · High confidence | In force | High confidence | |
| US 10,497,916 | Separator for Electrochemical Cell and Method for Its Manufacture In force · High confidence | In force | High confidence | |
| US 7,842,420 | Electrode Material with Enhanced Ionic Transport Properties In force · Medium confidence | In force | Medium confidence |
Also on record, not counted in the 106: 19 patents in force now held by others · 26 lapsed for an unpaid fee · 28 ended at full term. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
16 pending · 31 abandoned