Term ends Mar 23, 2027 · High confidence
20-year base term ends Mar 23, 2027
Held by TC1 LLC
Filed Oct 19, 2022 as application 18/047,876 · Granted Sep 2, 2025
Base term plus 161 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2007
2027
Clock starts
Mar 23, 2007
Mar 23, 2007
Term ends
Mar 23, 2027
Mar 23, 2027
Granted
Sep 2, 2025
Sep 2, 2025
base term
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
161
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 11,708,833.
None due
Maintenance fees
This term ends before the first maintenance fee's grace period does, 4 years from grant, so no fee can end it early.
9
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 161 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. No maintenance fee can end this term early. 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 23, 2007, when application 11/728,051, the earliest non-provisional in its chain, was filed (this one was filed Oct 19, 2022) | Mar 23, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +161 days, USPTO patent term adjustment record | Aug 31, 2027 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,708,833) | capped to Mar 23, 2027 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | No maintenance fee can end the term early | In force | High confidence |
| Computed term end | The steps above, in order | Mar 23, 2027 | High confidence |
This family
| US 7,841,976 | In force May 2029 | May 2029 |
| US 9,364,592 | In force no later than Mar 2027 | no later than Mar 2027 |
| US 9,364,593 | In force Mar 2027 | Mar 2027 |
| US 9,717,833 | In force Mar 2027 | Mar 2027 |
| US 10,149,932 | In force no later than Mar 2027 | no later than Mar 2027 |
| US 10,864,309 | In force Jul 2027 | Jul 2027 |
| US 11,708,833 | In force Mar 2027 | Mar 2027 |
| US 12,404,858 | this patent Mar 2027 | Mar 2027 |
8 of 9 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 |
|---|---|---|---|
| Oct 20, 2022 Reel 61479, frame 776 | McBride, Mark W.; Boger, David A.; Campbell, Robert L.; Dillon, Gregory P.; Hambric, Stephen A.; Kunz, Robert F.; Mallison, Thomas M.; Runt, James P.; Walsh, Justin M. | The Penn State Research Foundation | Assignment of Assignor's Interest |
| Oct 20, 2022 Reel 61479, frame 925 | Leschinsky, Boris | Datascope Investment Corp. | Assignment of Assignor's Interest |
| Oct 20, 2022 Reel 61480, frame 43 | Datascope Investment Corp. | Thoratec Corporation | Assignment of Assignor's Interest |
| Oct 20, 2022 Reel 61729, frame 718 | Thoratec Corporation | Thoratec LLC | Assignment of Assignor's Interest |
| Oct 20, 2022 Reel 61730, frame 1 | Thoratec LLC | TC1 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.
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Alerts on its grants, lapses and transfers.
What's changing
Mar 2027
Term ends Mar 23, 2027. No further fees fall due before then
Note
The 161 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 11,708,833.
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.