Term ends Mar 28, 2032 · High confidence
20-year base term ends Mar 28, 2032
Held by Zylox Tonbridge Medical Limited
Filed Mar 28, 2012 as application 13/433,049 · Granted Feb 4, 2014
Base term, 20 years from filing
Today
2012
2032
Clock starts
Mar 28, 2012
Mar 28, 2012
Term ends
Mar 28, 2032
Mar 28, 2032
Granted
Feb 4, 2014
Feb 4, 2014
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.
None
Terminal disclaimer
No disclaimer on this record.
3 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 is its 20-year base term, with no adjustment for prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 this application, 13/433,049, was filed | Mar 28, 2032 | 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 | 3 of 3 maintenance fees paid | In force (reinstated) | High confidence |
| Computed term end | The steps above, in order | Mar 28, 2032 | High confidence |
This family
| US 8,644,913 | this patent 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 | In force 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 |
|---|---|---|---|
| Jun 12, 2012 Reel 28362, frame 513 | 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 18, 2013 Reel 30248, frame 481 | Avinger, Inc. | PDL Biopharma, Inc. | Security Agreement |
| Sep 22, 2015 Reel 36627, frame 335 | Avinger, Inc. | CRG Partners III L.P.; CRG Partners III - Parallel Fund "a" L.P.; CRG Partners III - Parallel Fund "B" (Cayman) L.P.; CRG Partners III (Cayman) L.P. | Security Interest |
| Sep 22, 2015 Reel 36658, frame 847 | PDL Biopharma, Inc. | Avinger, Inc. | Release and Reassignment of Patents Recorded at Reel 30248/FRAME 481 |
| Sep 22, 2015 reel/frame not recorded | Avinger, Inc. | CRG Partners III L.P. | Security Interest |
| Sep 22, 2015 reel/frame not recorded | Avinger, Inc. | CRG Partners III - Parallel Fund "a" L.P. | Security Interest |
| Sep 22, 2015 reel/frame not recorded | Avinger, Inc. | CRG Partners III - Parallel Fund "B" (Cayman) L.P. | Security Interest |
| Sep 22, 2015 reel/frame not recorded | Avinger, Inc. | CRG Partners III (Cayman) L.P. | Security Interest |
| Apr 30, 2025 Reel 71135, frame 568 | Lumivascular, Inc. | Zylox Tonbridge Medical Limited | Security Interest |
| Oct 10, 2025 Reel 72541, frame 422 | Avinger, Inc. | Avinger (Assignment for the Benefit of Creditors), LLC | Assignment of Assignor's Interest |
| Oct 10, 2025 Reel 72835, frame 297 | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Mar 2032
Term ends Mar 28, 2032. No further fees fall due before then
Citations
224
later US patents cite this one
That is top 5% 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.