Also listed on GM Global Technology, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 23, 2026 · High confidence
20-year base term ended Oct 21, 2025
Filed Oct 21, 2005 as application 11/255,733 · Granted May 13, 2008
Base term plus 398 days of patent term adjustment (USPTO delay)
Today
2005
2026
Clock starts
Oct 21, 2005
Oct 21, 2005
Term ends
Nov 23, 2026
Nov 23, 2026
Granted
May 13, 2008
May 13, 2008
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
398
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.
This patent's term runs 398 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 Oct 21, 2005, when this application, 11/255,733, was filed | Oct 21, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +398 days, USPTO patent term adjustment record | Nov 23, 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 23, 2026 | High confidence |
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 |
|---|---|---|---|
| Mar 16, 2006 Reel 17345, frame 312 | Bruggemann, Charles J. | GM Global Technology Operations, Inc. | Assignment of Assignor's Interest |
| Feb 3, 2009 Reel 22195, frame 334 | GM Global Technology Operations, Inc. | United States Department of the Treasury | Security Agreement |
| Apr 16, 2009 Reel 22553, frame 493 | GM Global Technology Operations, Inc. | Citicorp USA, Inc. as Agent for Bank Priority Secured Parties; Citicorp USA, Inc. as Agent for Hedge Priority Secured Parties | Security Agreement |
| Apr 16, 2009 reel/frame not recorded | GM Global Technology Operations, Inc. | Citicorp USA, Inc. as Agent for Bank Priority Secured Parties | Security Agreement |
| Apr 16, 2009 reel/frame not recorded | GM Global Technology Operations, Inc. | Citicorp USA, Inc. as Agent for Hedge Priority Secured Parties | Security Agreement |
| Aug 20, 2009 Reel 23124, frame 519 | United States Department of the Treasury | GM Global Technology Operations, Inc. | Release of Security Interest |
| Aug 21, 2009 Reel 23127, frame 402 | Citicorp USA, Inc. as Agent for Bank Priority Secured Parties; Citicorp USA, Inc. as Agent for Hedge Priority Secured Parties | GM Global Technology Operations, Inc. | Release of Security Interest |
| Aug 27, 2009 Reel 23156, frame 142 | GM Global Technology Operations, Inc. | United States Department of the Treasury | Security Agreement |
| Aug 28, 2009 Reel 23162, frame 93 | GM Global Technology Operations, Inc. | Uaw Retiree Medical Benefits Trust | Security Agreement |
| Nov 4, 2010 Reel 25245, frame 587 | United States Department of the Treasury | GM Global Technology Operations, Inc. | Release of Security Interest |
| Nov 5, 2010 Reel 25314, frame 901 | Uaw Retiree Medical Benefits Trust | GM Global Technology Operations, Inc. | Release of Security Interest |
| Nov 8, 2010 Reel 25327, frame 41 | GM Global Technology Operations, Inc. | Wilmington Trust Company | Security Agreement |
| Feb 10, 2011 Reel 25780, frame 936 | GM Global Technology Operations, Inc. | GM Global Technology Operations LLC | Change of Name |
| Nov 7, 2014 Reel 34184, frame 1 | 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
Nov 2026
Term ends Nov 23, 2026. No further fees fall due before then
Note
The 398 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2008 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.