Term ends Apr 1, 2030 · High confidence
20-year base term ends Jul 7, 2028
Filed Jul 7, 2008 as application 12/168,816 · Granted Sep 29, 2015
Base term plus 633 days of patent term adjustment (USPTO delay)
Today
2008
2030
Clock starts
Jul 7, 2008
Jul 7, 2008
Term ends
Apr 1, 2030
Apr 1, 2030
Granted
Sep 29, 2015
Sep 29, 2015
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
633
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.
5
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 633 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Jul 7, 2008, when this application, 12/168,816, was filed | Jul 7, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +633 days, USPTO patent term adjustment record | Apr 1, 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 | In force | High confidence |
| Computed term end | The steps above, in order | Apr 1, 2030 | High confidence |
This family
| US 7,867,835 | Lapsed on the fee record Jan 2019 | Jan 2019 |
| US 7,892,900 | In force Jun 2029 | Jun 2029 |
| US 7,833,888 | Lapsed on the fee record Nov 2022 | Nov 2022 |
| US 8,115,276 | In force Feb 2030 | Feb 2030 |
| US 9,147,654 | this patent Apr 2030 | Apr 2030 |
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 |
|---|---|---|---|
| Jul 7, 2008 Reel 21201, frame 642 | Sheng, Haifeng; Zhang, Fan; Tan, Juan Boon; Zhang, Bei Chao; Sohn, Dong Kyun | Chartered Semiconductor Manufacturing Ltd. | Assignment of Assignor's Interest |
| Nov 27, 2018 Reel 47660, frame 203 | GlobalFoundries Singapore Pte. Ltd. | Wilmington Trust, National Association | Security Agreement |
| Nov 19, 2020 Reel 54481, frame 673 | Wilmington Trust, National Association | GlobalFoundries Singapore Pte. Ltd. | 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
Apr 2030
Term ends Apr 1, 2030. Maintenance fees still fall due before then
Note
The 633 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2015 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.