Term ends Jul 30, 2030 · High confidence
20-year base term ends Apr 24, 2028
Filed Oct 19, 2009 as application 12/581,659 · Granted Jul 16, 2013
Base term plus 827 days of patent term adjustment (USPTO delay)
Today
2008
2030
Clock starts
Apr 24, 2008
Apr 24, 2008
Term ends
Jul 30, 2030
Jul 30, 2030
Granted
Jul 16, 2013
Jul 16, 2013
base term
patent term adjustment
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
827
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
15
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 827 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 24, 2008, when application 12/108,581, the earliest non-provisional in its chain, was filed (this one was filed Oct 19, 2009) | Apr 24, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +827 days, USPTO patent term adjustment record | Jul 30, 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 30, 2030 | High confidence |
This family
| US 8,917,904 | Lapsed on the fee record Dec 2022 | Dec 2022 |
| US 8,634,593 | In force Nov 2030 | Nov 2030 |
| US 8,452,053 | In force Feb 2031 | Feb 2031 |
| US 8,803,966 | In force Aug 2031 | Aug 2031 |
| US 8,421,859 | In force Mar 2030 | Mar 2030 |
| US 8,332,134 | In force Oct 2029 | Oct 2029 |
| US 8,699,754 | In force May 2030 | May 2030 |
| US 8,487,991 | this patent Jul 2030 | Jul 2030 |
8 of 15 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 |
|---|---|---|---|
| Jan 6, 2010 Reel 23738, frame 442 | Zhang, Wende | GM Global Technology Operations, Inc. | Assignment of Assignor's Interest |
| Jan 6, 2010 Reel 23738, frame 487 | Wu, Qi; Chen, Tsuhan | Carnegie Mellon University | 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 136 | 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 34189, frame 65 | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jul 2030
Term ends Jul 30, 2030. No further fees fall due before then
Note
The 827 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
76
later US patents cite this one
That is top 10% 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.