Also listed on Adhawk Microsystems Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 31, 2030 · High confidence
20-year base term ends Oct 15, 2029
Held by Google LLC
Filed Oct 15, 2009 as application 12/579,872 · Granted Mar 19, 2013
Base term plus 320 days of patent term adjustment (USPTO delay)
Today
2009
2030
Clock starts
Oct 15, 2009
Oct 15, 2009
Term ends
Aug 31, 2030
Aug 31, 2030
Granted
Mar 19, 2013
Mar 19, 2013
base term
patent term adjustment
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
320
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.
2
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 320 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 15, 2009, when this application, 12/579,872, was filed | Oct 15, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +320 days, USPTO patent term adjustment record | Aug 31, 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 | Aug 31, 2030 | High confidence |
This family
| US 8,402,561 | this patent Aug 2030 | Aug 2030 |
| Application 13/760,725 | Abandoned not computed | not computed |
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 2, 2010 Reel 23946, frame 71 | Sarkar, Niladri | Icspi Corp. | Assignment of Assignor's Interest |
| Apr 20, 2017 Reel 42087, frame 620 | Icspi Corp. | Adhawk Microsystems Inc. | Assignment of Assignor's Interest |
| Mar 13, 2024 Reel 66794, frame 640 | Adhawk Microsystems Inc. | Grip Investments Limited; The Xchange Fund I, L.P.; Canso Technology Value Fund; Canso Technology Value Fund LP | Security Interest |
| Mar 13, 2024 reel/frame not recorded | Adhawk Microsystems Inc. | Grip Investments Limited | Security Interest |
| Mar 13, 2024 reel/frame not recorded | Adhawk Microsystems Inc. | The Xchange Fund I, L.P. | Security Interest |
| Mar 13, 2024 reel/frame not recorded | Adhawk Microsystems Inc. | Canso Technology Value Fund | Security Interest |
| Mar 13, 2024 reel/frame not recorded | Adhawk Microsystems Inc. | Canso Technology Value Fund LP | Security Interest |
| Oct 8, 2024 Reel 68826, frame 207 | Adhawk Microsystems Inc. D/B/A Adhawk Microsystems | Silicon Valley Bank, a Division of First-Citizens Bank & Trust Company | Security Interest |
| Apr 3, 2025 Reel 70730, frame 229 | Canso Technology Value Fund | Adhawk Microsystems Inc. | Release of Security Interest |
| Apr 3, 2025 Reel 70730, frame 756 | The Xchange Fund I, L.P. | Adhawk Microsystems Inc. | Release of Security Interest |
| Apr 3, 2025 Reel 70730, frame 777 | Silicon Valley Bank, a Division of First-Citizens Bank & Trust Company | Adhawk Microsystems Inc. | Release of Security Interest |
| Apr 3, 2025 Reel 70730, frame 787 | Grip Investments Limited | Adhawk Microsystems Inc. | Release of Security Interest |
| Apr 3, 2025 Reel 70730, frame 797 | Canso Technology Value Fund LP | Adhawk Microsystems Inc. | Release of Security Interest |
| Jul 16, 2025 Reel 71720, frame 287 | Adhawk Microsystems Inc. | Google LLC | Assignment of Assignor's 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
Aug 2030
Term ends Aug 31, 2030. No further fees fall due before then
Note
The 320 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
5
later US patents cite this one
That is below the median 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.