Also listed on Integrity Implants Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Sep 18, 2025 (Cerberus Business Finance Agency, LLC).
Term ends Mar 15, 2033 · High confidence
20-year base term ends Mar 15, 2033
Held by Highridge Medical LLC
Filed Apr 5, 2016 as application 15/091,535 · Granted Dec 11, 2018
Base term, 20 years from filing
Today
2013
2033
Clock starts
Mar 15, 2013
Mar 15, 2013
Term ends
Mar 15, 2033
Mar 15, 2033
Granted
Dec 11, 2018
Dec 11, 2018
base term
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,663,332, US 9,060,876, US 9,402,733, to Mar 15, 2033. The term already ends on or before that date, so the cap shortened nothing.
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.
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. 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 15, 2013, when application 13/815,787, the earliest non-provisional in its chain, was filed (this one was filed Apr 5, 2016) | Mar 15, 2033 | 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 | Disclaimer resolved from the filed document (refs US 8,663,332, US 9,060,876, US 9,402,733) | resolves to Mar 15, 2033, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 15, 2033 | High confidence |
This family
| US 8,663,332 | In force Mar 2033 | Mar 2033 |
| Application PCT/US2013/073435 | PCT application no patent term | no patent term |
| US 9,333,092 | In force Mar 2033 | Mar 2033 |
| US 10,149,773 | this patent Mar 2033 | Mar 2033 |
| US 10,786,366 | In force Mar 2033 | Mar 2033 |
| US 11,234,837 | In force Mar 2033 | Mar 2033 |
| US 11,076,968 | In force Mar 2033 | Mar 2033 |
| US 12,390,344 | In force Nov 2034 | Nov 2034 |
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 |
|---|---|---|---|
| Apr 26, 2016 Reel 38381, frame 811 | Ouroboros Medical, Inc. | Integrity Implants Inc. | Assignment of Assignor's Interest |
| Dec 31, 2019 Reel 51393, frame 643 | Integrity Implants, Inc. | Heritage Bank of Commerce | Security Interest |
| Jun 7, 2021 Reel 56500, frame 116 | Heritage Bank of Commerce | Integrity Implants Inc. | Release of Security Interest |
| Jun 18, 2021 Reel 57079, frame 965 | Integrity Implants Inc. | Eastward Fund Management, LLC | Security Interest |
| Nov 10, 2023 Reel 65536, frame 632 | Eastward Fund Management, LLC | Integrity Implants Inc. | Release of Security Interest |
| Dec 21, 2023 Reel 66090, frame 832 | Integrity Implants Inc. | Symbiotic Capital Agency LLC, as Administrative Agent | Patent Security Agreement |
| Jan 18, 2025 Reel 69925, frame 812 | To, John; Flynn, John J; Birkmeyer, Paul J | Integrity Implants Inc. | Assignment of Assignor's Interest |
| Jan 18, 2025 Reel 69925, frame 910 | To, John; Flynn, John J; Birkmeyer, Paul J | Ouroboros Medical, Inc. | Assignment of Assignor's Interest |
| Aug 28, 2025 Reel 72709, frame 756 | Symbiotic Capital Agency LLC, as Administrative Agent | Integrity Implants Inc. | Release of Security Interest in Patent |
| Sep 12, 2025 Reel 72879, frame 290 | Symbiotic Capital Agency LLC | Integrity Implants Inc. | Release of Security Interest |
| Sep 17, 2025 Reel 72281, frame 955 | Integrity Implants Inc. | Highridge Medical LLC | Assignment of Assignor's Interest |
| Sep 18, 2025 Reel 72942, frame 175 | Highridge Medical, LLC (F/K/A Zimmer Biomet Spine, LLC) | Cerberus Business Finance Agency, LLC, as Collateral Agent | Grant of a Security Interest -- Patents |
| Jun 27, 2026 Reel 76224, frame 379 | Zeb Intermediate, LLC; Zeb Buyer, LLC,; Highridge Medical, LLC, | Wingspire Capital LLC, 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
Mar 2033
Term ends Mar 15, 2033. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,663,332, US 9,060,876, US 9,402,733, ends no earlier than this term, so it caps nothing.
Citations
37
later US patents cite this one
That is top 10% of utility patents granted in 2018 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.