Collateral for a security interest recorded Apr 23, 2026 (HSBC UK Bank PLC).
Term ends Nov 20, 2027 · High confidence
20-year base term ends Dec 29, 2026
Held by Leotek Electronics USA, LLC
Filed Mar 26, 2008 as application 12/055,544 · Granted Apr 5, 2011
Base term plus 326 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Dec 29, 2006
Dec 29, 2006
Term ends
Nov 20, 2027
Nov 20, 2027
Granted
Apr 5, 2011
Apr 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
326
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.
7
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 326 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 Dec 29, 2006, when application 11/618,552, the earliest non-provisional in its chain, was filed (this one was filed Mar 26, 2008) | Dec 29, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +326 days, USPTO patent term adjustment record | Nov 20, 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 20, 2027 | High confidence |
This family
| US 7,777,322 | In force Jun 2027 | Jun 2027 |
| US 7,918,582 | this patent Nov 2027 | Nov 2027 |
| US 7,602,057 | In force Dec 2026 | Dec 2026 |
| US 7,973,402 | In force Dec 2026 | Dec 2026 |
| US 8,328,388 | In force Dec 2026 | Dec 2026 |
| US 8,432,029 | In force Dec 2026 | Dec 2026 |
6 of 7 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 |
|---|---|---|---|
| Mar 26, 2008 Reel 20707, frame 670 | Curran, John W.; Peck, John | Dialight Corporation | Assignment of Assignor's Interest |
| Jul 21, 2022 Reel 60803, frame 351 | Dialight Corporation | HSBC UK Bank PLC, as Security Agent | Security Interest |
| Jul 29, 2024 Reel 68171, frame 975 | HSBC UK Bank PLC | Dialight Corporation | Partial Release of Security Interest in Patents |
| Dec 6, 2024 Reel 69532, frame 449 | Dialight Corporation | Leotek Electronics USA, LLC | Intellectual Property Assignment and License Agreement |
| Apr 23, 2026 Reel 75465, frame 389 | Dialight Corporation | HSBC UK Bank PLC | 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
Nov 2027
Term ends Nov 20, 2027. No further fees fall due before then
Note
The 326 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
8
later US patents cite this one
That is below the median 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.