Collateral for a security interest recorded Jul 21, 2022 (The Bank of Nova Scotia).
Term ended May 9, 2026 · Medium confidence
20-year base term ended May 9, 2026
Why Medium: A parent in the chain could not be resolved.
Held by Quadlogic Controls Corporation
Filed Nov 14, 2006 as application 11/600,234 · Granted Sep 29, 2009
Base term, 20 years from filing
Today
Term ended May 9, 2026
2006
2026
Clock starts
May 9, 2006
May 9, 2006
Term ended
May 9, 2026
May 9, 2026
Granted
Sep 29, 2009
Sep 29, 2009
base term
after the term ends
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 were paid, so no fee lapse ended it. 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 May 9, 2006, when application 11/431,849, the earliest non-provisional in its chain, was filed (this one was filed Nov 14, 2006); a parent in its chain could not be resolved (the next row) | May 9, 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 | term ended | High confidence |
| Computed term end | The steps above, in order | May 9, 2026 | Medium confidence |
This family
| US 7,227,451 | Term ended Aug 2025 | Aug 2025 |
| US 7,596,459 | this patent May 2026 | May 2026 |
| US 7,948,363 | Lapsed on the fee record May 2023 | May 2023 |
| US 8,026,628 | In force 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 |
|---|---|---|---|
| Feb 13, 2007 Reel 18886, frame 904 | Swarztrauber, Sayre A.; Shafrir, Doron; Malik, Siddarth; Hayward, Robert | 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.
Citations
16
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.