Term ends Nov 2, 2027 · High confidence
20-year base term ended May 12, 2026
Held by Koninklijke Philips N.V.
Filed Apr 18, 2009 as application 12/426,232 · Granted Feb 21, 2012
Base term plus 539 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
May 12, 2006
May 12, 2006
Term ends
Nov 2, 2027
Nov 2, 2027
Granted
Feb 21, 2012
Feb 21, 2012
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
539
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.
23
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 539 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 May 12, 2006, when application 11/433,900, the earliest non-provisional in its chain, was filed (this one was filed Apr 18, 2009) | May 12, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +539 days, USPTO patent term adjustment record | Nov 2, 2027 | 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 2, 2027 | High confidence |
This family
| US 7,539,532 | In force Aug 2027 | Aug 2027 |
| US 7,558,622 | In force (reinstated) Aug 2027 | Aug 2027 |
| US 8,121,673 | this patent Nov 2027 | Nov 2027 |
| US 8,108,036 | In force Sep 2027 | Sep 2027 |
| US 8,328,718 | Term ended May 2026 | May 2026 |
| US 8,449,471 | Term ended May 2026 | May 2026 |
| US 8,323,189 | Term ended May 2026 | May 2026 |
| US 8,425,415 | Term ended May 2026 | May 2026 |
8 of 23 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 |
|---|---|---|---|
| Dec 22, 2014 Reel 34570, frame 704 | Tran, Bao; Tran, Ha-thi | Empire IP LLC | Assignment of Assignor's Interest |
| Dec 18, 2015 Reel 37332, frame 414 | Empire IP LLC | West 74TH Street, Series 75 of Allied Security Trust I | Assignment of Assignor's Interest |
| Apr 21, 2016 Reel 38337, frame 970 | West 74TH Street, Series 75 of Allied Security Trust I | Koninklijke Philips N.V. | 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
Nov 2027
Term ends Nov 2, 2027. No further fees fall due before then
Note
The 539 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
267
later US patents cite this one
That is top 5% of utility patents granted in 2012 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.