Term ended Jan 15, 2026 · High confidence
20-year base term ended Feb 7, 2025
Held by A123 Systems LLC
Filed Dec 30, 2013 as application 14/143,455 · Granted Mar 28, 2017
Base term plus 342 days of patent term adjustment (USPTO delay)
Today
Term ended Jan 15, 2026
2005
2026
Clock starts
Feb 7, 2005
Feb 7, 2005
Term ended
Jan 15, 2026
Jan 15, 2026
Granted
Mar 28, 2017
Mar 28, 2017
base term
patent term adjustment
after the term ends
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
342
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
6
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 342 days past its 20-year base term on prosecution delay. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Feb 7, 2005, when application 11/052,971, the earliest non-provisional in its chain, was filed (this one was filed Dec 30, 2013) | Feb 7, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +342 days, USPTO patent term adjustment record | Jan 15, 2026 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Jan 15, 2026 | High confidence |
This family
| US 7,348,101 | Term ended Mar 2025 | Mar 2025 |
| US 7,261,979 | Term ended Feb 2025 | Feb 2025 |
| US 8,617,745 | In force Jun 2029 | Jun 2029 |
| US 7,799,461 | Term ended no later than Feb 2025 | no later than Feb 2025 |
| US 8,080,338 | Term ended no later than Feb 2025 | no later than Feb 2025 |
| US 9,608,292 | this patent Jan 2026 | Jan 2026 |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Feb 6, 2017 Reel 41186, frame 107 | Gozdz, Antoni S.; Chu, Andrew C.; Fulop, Ricardo; Chiang, Yet-ming; Riley, Gilbert N.; Lin, Roger | A123 Systems, Inc. | Assignment of Assignor's Interest |
| Feb 15, 2017 Reel 41730, frame 549 | A123 Systems, Inc. | Wanxiang America Corporation | Security Agreement |
| Feb 15, 2017 Reel 41730, frame 761 | Wanxiang America Corporation | A123 Systems, Inc. | Bankruptcy Order Authorizing the Sale of Assets Free and Clear of All Claims, Liens, Liabilities, Rights, Interests and Encumbrances (Releases Wanxiang Security Interest) |
| Feb 15, 2017 Reel 41730, frame 524 | A123 Systems, Inc. | Wanxiang Clean Energy USA Acquisition LLC | Assignment of Assignors Interest (SEE Document for Details) |
| Feb 15, 2017 Reel 41730, frame 587 | Wanxiang Clean Energy USA Acquisition LLC | A123 Systems LLC | Change of Name (SEE Document for Details) |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
The 342 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
34
later US patents cite this one
That is top 10% of utility patents granted in 2017 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.