Collateral for a security interest recorded Jul 21, 2022 (The Bank of Nova Scotia).
Lapsed May 24, 2023 on the fee record · High confidence
20-year base term ended Aug 4, 2025
Third maintenance fee unpaid; grace period ended.
Held by Quadlogic Controls Corporation
Filed May 21, 2007 as application 11/805,152 · Granted May 24, 2011
Base term, 20 years from filing, plus 301 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Lapsed May 24, 2023
2005
2026
Clock starts
Aug 4, 2005
Aug 4, 2005
No longer in force
May 24, 2023
May 24, 2023
Granted
May 24, 2011
May 24, 2011
Term would have run to
Aug 4, 2025
Aug 4, 2025
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
301
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 7,227,451.
2 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.
Its term would have run to Aug 4, 2025: its 20-year base term plus 301 days of term adjustment for prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Aug 4, 2005, when application 11/198,795, the earliest non-provisional in its chain, was filed (this one was filed May 21, 2007) | Aug 4, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +301 days, USPTO patent term adjustment record | Jun 1, 2026 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,227,451) | capped to Aug 4, 2025 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed May 24, 2023 | High confidence |
| Computed term end | The steps above, in order | May 24, 2023 | High 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 | this patent 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 |
|---|---|---|---|
| May 27, 2010 Reel 24452, frame 253 | Swarztrauber, Sayre; Newsome, Michael | 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
Note
The 301 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 7,227,451.
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.