Term ends Dec 8, 2026 · High confidence
20-year base term ends Dec 8, 2026
Filed Dec 8, 2006 as application 11/608,254 · Granted Jul 28, 2009
Base term, 20 years from filing
Today
2006
2026
Clock starts
Dec 8, 2006
Dec 8, 2006
Term ends
Dec 8, 2026
Dec 8, 2026
Granted
Jul 28, 2009
Jul 28, 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.
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 Dec 8, 2006, when this application, 11/608,254, was filed | Dec 8, 2026 | 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 | Dec 8, 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 |
|---|---|---|---|
| Dec 8, 2006 Reel 18600, frame 354 | Yang, Wen-kun; Chang, Jui-hsien | Advanced Chip Engineering Technology Inc. | Assignment of Assignor's Interest |
| Sep 15, 2023 Reel 64926, frame 845 | Adl Engineering Inc.; Advanced Chip Engineering Technology Inc. | Adl Engineering Inc. | Merger |
| Sep 15, 2023 Reel 64927, frame 462 | Adl Engineering Inc. | Adl Energy Corp. | Change of Name |
| Dec 27, 2023 Reel 65957, frame 661 | Adl Energy Corp. | Taiwan Semiconductor Manufacturing Company, 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
Dec 2026
Term ends Dec 8, 2026. No further fees fall due before then
Citations
18
later US patents cite this one
That is above 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.