Term ends Apr 5, 2035 · High confidence
20-year base term ends Mar 28, 2032
Held by Zylox Tonbridge Medical Limited
Filed Feb 16, 2017 as application 15/434,758 · Granted Oct 5, 2021
Base term plus 1103 days of patent term adjustment (USPTO delay)
Today
2012
2035
Clock starts
Mar 28, 2012
Mar 28, 2012
Term ends
Apr 5, 2035
Apr 5, 2035
Granted
Oct 5, 2021
Oct 5, 2021
base term
patent term adjustment
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
1,103
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
13
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 1103 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is 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 28, 2012, when application 13/433,049, the earliest non-provisional in its chain, was filed (this one was filed Feb 16, 2017) | Mar 28, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1103 days, USPTO patent term adjustment record | Apr 5, 2035 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 5, 2035 | High confidence |
This family
| US 8,644,913 | In force (reinstated) Mar 2032 | Mar 2032 |
| Application PCT/US2012/064848 | PCT application no patent term | no patent term |
| US 9,345,406 | In force May 2032 | May 2032 |
| Application PCT/US2013/064346 | PCT application no patent term | no patent term |
| US 9,572,492 | In force Apr 2033 | Apr 2033 |
| US 9,949,754 | In force Jul 2032 | Jul 2032 |
| US 11,135,019 | In force Mar 2032 | Mar 2032 |
| US 11,134,849 | this patent Apr 2035 | Apr 2035 |
8 of 13 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 |
|---|---|---|---|
| Nov 20, 2020 Reel 54437, frame 96 | Simpson, John B.; Patel, Himanshu N.; Zung, Michael; McNall, Charles W.; Gupta, Priyanshu; Spencer, Maegan K.; White, Christopher B.; Jackson, Dennis W.; Black, John F. | Avinger, Inc. | Assignment of Assignor's Interest |
| Apr 30, 2025 Reel 71135, frame 568 | Lumivascular, Inc. | Zylox Tonbridge Medical Limited | Security Interest |
| Oct 10, 2025 Reel 72852, frame 136 | Avinger, Inc. | Avinger (Assignment for the Benefit of Creditors), LLC | Assignment of Assignor's Interest |
| Oct 10, 2025 Reel 72835, frame 378 | Avinger (Assignment for the Benefit of Creditors), LLC | Lumivascular, Inc. | Assignment of Assignor's Interest |
| Oct 21, 2025 Reel 73068, frame 297 | Lumivascular, Inc. | Zylox Tonbridge Medical Limited | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Apr 2035
Term ends Apr 5, 2035. Maintenance fees still fall due before then
Note
The 1103 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
46
later US patents cite this one
That is top 5% of utility patents granted in 2021 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.