Term ends Apr 27, 2027 · High confidence
20-year base term ends Apr 27, 2027
Filed Apr 27, 2007 as application 11/740,939 · Granted Sep 29, 2009
Base term, 20 years from filing
Today
2007
2027
Clock starts
Apr 27, 2007
Apr 27, 2007
Term ends
Apr 27, 2027
Apr 27, 2027
Granted
Sep 29, 2009
Sep 29, 2009
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
13
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 is its 20-year base term, with no adjustment for 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 27, 2007, when this application, 11/740,939, was filed | Apr 27, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | Apr 27, 2027 | High confidence |
This family
| US 7,902,066 | Lapsed on the fee record Mar 2023 | Mar 2023 |
| US 7,566,656 | In force Jan 2027 | Jan 2027 |
| US 7,855,143 | In force Dec 2028 | Dec 2028 |
| US 7,829,422 | Lapsed on the fee record Nov 2022 | Nov 2022 |
| Application 11/672,971 | Abandoned not computed | not computed |
| US 7,618,873 | Lapsed on the fee record Nov 2021 | Nov 2021 |
| US 8,450,832 | In force Jul 2028 | Jul 2028 |
| US 7,595,237 | this patent Apr 2027 | Apr 2027 |
8 of 13 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 |
|---|---|---|---|
| Apr 27, 2007 Reel 19219, frame 891 | Chen, Xiaoyu; Liu, Donghua; Jung, Sung Mun; Woo, Swee Tuck; Low, Rachel; Lim, Louis; Chwa, Siow Lee | Chartered Semiconductor Manufacturing, Ltd. | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Apr 2027
Term ends Apr 27, 2027. No further fees fall due before then
Citations
6
later US patents cite this one
That is below the median of utility patents granted in 2009 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.