Lapsed Jan 1, 2025 on the fee record · High confidence
20-year base term ends Apr 2, 2029
Third maintenance fee unpaid; grace period ended.
Filed Sep 21, 2009 as application 12/563,400 · Granted Jan 1, 2013
Base term, 20 years from filing, plus 606 days of patent term adjustment (USPTO delay)
Today
Lapsed Jan 1, 2025
2009
2030
Clock starts
Apr 2, 2009
Apr 2, 2009
No longer in force
Jan 1, 2025
Jan 1, 2025
Granted
Jan 1, 2013
Jan 1, 2013
Term would have run to
Nov 29, 2030
Nov 29, 2030
base term
patent term adjustment
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
606
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 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
23
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Nov 29, 2030: its 20-year base term plus 606 days of term adjustment for 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 Apr 2, 2009, when application 12/417,077, the earliest non-provisional in its chain, was filed (this one was filed Sep 21, 2009) | Apr 2, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +606 days, USPTO patent term adjustment record | Nov 29, 2030 | 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 3 maintenance fees paid | lapsed Jan 1, 2025 | High confidence |
| Computed term end | The steps above, in order | Jan 1, 2025 | High confidence |
This family
| US 8,629,903 | In force Mar 2032 | Mar 2032 |
| US 8,629,784 | In force Aug 2032 | Aug 2032 |
| US 8,704,653 | In force Dec 2032 | Dec 2032 |
| US 7,924,146 | Lapsed on the fee record Apr 2023 | Apr 2023 |
| US 8,358,224 | In force Jan 2031 | Jan 2031 |
| US 8,269,652 | In force Oct 2030 | Oct 2030 |
| Application 12/563,379 | Abandoned not computed | not computed |
| US 8,344,894 | this patent Jan 2025 | Jan 2025 |
8 of 23 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Nov 3, 2009 Reel 23461, frame 930 | Szczerba, Joseph F.; Cui, Dehua; Seder, Thomas A. | GM Global Technology Operations, Inc. | Assignment of Assignor's Interest |
| Feb 25, 2010 Reel 23989, frame 155 | GM Global Technology Operations, Inc. | United States Department of the Treasury | Security Agreement |
| Feb 25, 2010 Reel 23990, frame 1 | GM Global Technology Operations, Inc. | Uaw Retiree Medical Benefits Trust | Security Agreement |
| Nov 4, 2010 Reel 25246, frame 234 | United States Department of the Treasury | GM Global Technology Operations, Inc. | Release of Security Interest |
| Nov 5, 2010 Reel 25315, frame 91 | Uaw Retiree Medical Benefits Trust | GM Global Technology Operations, Inc. | Release of Security Interest |
| Nov 8, 2010 Reel 25324, frame 555 | GM Global Technology Operations, Inc. | Wilmington Trust Company | Security Agreement |
| Feb 10, 2011 Reel 25781, frame 299 | GM Global Technology Operations, Inc. | GM Global Technology Operations LLC | Change of Name |
| Nov 7, 2014 Reel 34185, frame 789 | Wilmington Trust Company | GM Global Technology Operations LLC | Release of Security Interest |
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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 606 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
140
later US patents cite this one
That is top 5% of utility patents granted in 2013 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.