Term ended Mar 11, 2025 · High confidence
20-year base term ended Mar 11, 2025
USPTO later recorded it as expired for non-payment on Aug 24, 2026.
Held by Calabrese Stemer LLC
Filed Aug 23, 2013 as application 13/974,462 · Granted Jul 22, 2014
Base term, 20 years from filing
Today
Term ended Mar 11, 2025
2005
2026
Clock starts
Mar 11, 2005
Mar 11, 2005
Term ended
Mar 11, 2025
Mar 11, 2025
Granted
Jul 22, 2014
Jul 22, 2014
base term
after the term ends
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 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.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
4
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. 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 Mar 11, 2005, when application 11/077,783, the earliest non-provisional in its chain, was filed (this one was filed Aug 23, 2013) | Mar 11, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High 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 | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Aug 24, 2026, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Mar 11, 2025 | High confidence |
This family
| US 7,357,310 | Term ended Mar 2025 | Mar 2025 |
| US 7,954,706 | In force Dec 2026 | Dec 2026 |
| US 9,406,069 | In force Jun 2027 | Jun 2027 |
| US 8,783,564 | this patent Mar 2025 | Mar 2025 |
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 27, 2013 Reel 31088, frame 237 | Calabrese, Gerry; Stemer, Werner | Calabrese Stemer LLC | Assignment of Assignor's 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
10
later US patents cite this one
That is above the median of utility patents granted in 2014 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.