Term ends Aug 23, 2029 · High confidence
20-year base term ends Oct 31, 2027
Filed Oct 31, 2007 as application 11/981,380 · Granted Jul 5, 2011
Base term plus 662 days of patent term adjustment (USPTO delay)
Today
2007
2029
Clock starts
Oct 31, 2007
Oct 31, 2007
Term ends
Aug 23, 2029
Aug 23, 2029
Granted
Jul 5, 2011
Jul 5, 2011
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
662
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.
9
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 662 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 31, 2007, when this application, 11/981,380, was filed | Oct 31, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +662 days, USPTO patent term adjustment record | Aug 23, 2029 | 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 23, 2029 | High confidence |
This family
| US 7,972,875 | this patent Aug 2029 | Aug 2029 |
| US 8,722,458 | In force Oct 2028 | Oct 2028 |
| US 9,117,940 | In force Oct 2027 | Oct 2027 |
| US 9,601,671 | In force Oct 2027 | Oct 2027 |
| US 10,504,882 | In force Jan 2028 | Jan 2028 |
| US 10,424,572 | In force Oct 2027 | Oct 2027 |
| US 10,361,180 | In force Oct 2027 | Oct 2027 |
| US 11,309,305 | Term ended Jun 2025 | Jun 2025 |
8 of 9 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 |
|---|---|---|---|
| Jul 26, 2010 Reel 24738, frame 820 | Menard, Etienne | Semprius, Inc. | Assignment of Assignor's Interest |
| Jul 26, 2010 Reel 24738, frame 935 | Rogers, John A.; Nuzzo, Ralph G.; Meitl, Matthew; Baca, Alfred J.; Motala, Michael; Ahn, Jong-hyun; Park, Sang-il; Yu, Chang-jae; Ko, Heung-cho; Stoykovich, Mark; Yoon, Jongseung | The Board of Trustees of the University of Illinois | Assignment of Assignor's Interest |
| Aug 30, 2011 Reel 26833, frame 46 | University of Illinois | Energy, United State Department Of | Confirmatory License |
| Apr 11, 2017 Reel 42231, frame 140 | Semprius, Inc. | Semprius (Assignment for the Benefit of Creditors), LLC | Assignment of Assignor's Interest |
| Apr 13, 2017 Reel 42244, frame 531 | Semprius (Assignment for the Benefit of Creditors), LLC | X-Celeprint Limited | Assignment of Assignor's Interest |
| May 11, 2020 Reel 52631, frame 800 | X-Celeprint Limited | X Display Company Technology Limited | Change of Name |
| Sep 16, 2021 Reel 57501, frame 765 | X-Celeprint Limited | X Display Company Technology Limited | Change of Name |
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 2029
Term ends Aug 23, 2029. No further fees fall due before then
Note
The 662 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
687
later US patents cite this one
That is top 1% of utility patents granted in 2011 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.