Term ends Jan 23, 2033 · High confidence
20-year base term ends Jan 23, 2033
Held by Alcon Inc.
Filed Jan 23, 2013 as application 13/748,207 · Granted Aug 4, 2015
Base term, 20 years from filing
Today
2013
2033
Clock starts
Jan 23, 2013
Jan 23, 2013
Term ends
Jan 23, 2033
Jan 23, 2033
Granted
Aug 4, 2015
Aug 4, 2015
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.
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.
26
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. 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 Jan 23, 2013, when this application, 13/748,207, was filed | Jan 23, 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 | None on record | no cap applied | 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 | Jan 23, 2033 | High confidence |
This family
| Application PCT/US2013/022752 | PCT application no patent term | no patent term |
| US 9,095,424 | this patent Jan 2033 | Jan 2033 |
| US 9,125,736 | In force Jan 2033 | Jan 2033 |
| US 9,289,287 | In force Jan 2033 | Jan 2033 |
| Application PCT/US2014/037646 | PCT application no patent term | no patent term |
| US 10,080,648 | In force Sep 2036 | Sep 2036 |
| Application PCT/US2015/014046 | PCT application no patent term | no patent term |
| US 9,387,069 | In force Jan 2033 | Jan 2033 |
8 of 26 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 |
|---|---|---|---|
| Aug 21, 2013 Reel 31057, frame 89 | Kahook, Malik Y.; Mandava, Naresh | The Regents of the University of Colorado | Assignment of Assignor's Interest |
| Aug 29, 2013 Reel 31107, frame 234 | McLean, Paul; Atkinson, Robert E. | Prospex Medical IV, Inc. | Assignment of Assignor's Interest |
| Sep 3, 2013 Reel 31142, frame 361 | Prospex Medical IV, Inc. | Clarvista Medical, Inc. | Change of Name |
| Oct 3, 2013 Reel 31336, frame 480 | McLean, Paul; Atkinson, Robert E. | Clarvista Medical, Inc. | Assignment of Assignor's Interest |
| Dec 13, 2019 Reel 51285, frame 560 | Clarvista Medical, Inc. | Alcon Inc. | Confirmatory Deed of Assignment Effective April 8, 2019 |
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
Jan 2033
Term ends Jan 23, 2033. Maintenance fees still fall due before then
Citations
204
later US patents cite this one
That is top 5% of utility patents granted in 2015 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.