Collateral for a security interest recorded Jul 21, 2022 (The Bank of Nova Scotia).
Term ends Nov 22, 2026 · Medium confidence
20-year base term ends Nov 22, 2026
Why Medium: A parent in the chain could not be resolved.
Held by Quadlogic Controls Corporation
Filed Feb 25, 2010 as application 12/713,030 · Granted Sep 27, 2011
Base term, 20 years from filing
Today
2006
2026
Clock starts
Nov 22, 2006
Nov 22, 2006
Term ends
Nov 22, 2026
Nov 22, 2026
Granted
Sep 27, 2011
Sep 27, 2011
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.
10
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: Medium. 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 Nov 22, 2006, when application 11/604,043, the earliest non-provisional in its chain, was filed (this one was filed Feb 25, 2010); a parent in its chain could not be resolved (the next row) | Nov 22, 2026 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium 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 | Nov 22, 2026 | Medium confidence |
This family
| US 7,227,451 | Term ended Aug 2025 | Aug 2025 |
| US 7,596,459 | Term ended May 2026 | May 2026 |
| US 7,948,363 | Lapsed on the fee record May 2023 | May 2023 |
| US 8,026,628 | this patent Nov 2026 | Nov 2026 |
| US 8,183,988 | Lapsed on the fee record May 2024 | May 2024 |
| US 9,255,949 | In force Jul 2033 | Jul 2033 |
| US 9,933,465 | Lapsed on the fee record Apr 2026 | Apr 2026 |
| US 10,281,509 | In force Jun 2032 | Jun 2032 |
8 of 10 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 |
|---|---|---|---|
| Aug 9, 2011 Reel 26721, frame 426 | Swarztrauber, Sayre A.; Malik, Siddharth | Quadlogic Controls Corporation | Assignment of Assignor's Interest |
| Jul 21, 2022 Reel 60579, frame 877 | Quadlogic Controls Corporation | The Bank of Nova Scotia, as Administrative Agent | 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.
What's changing
Nov 2026
Term ends Nov 22, 2026. No further fees fall due before then
Citations
3
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.