Term ended Apr 20, 2025 · Medium confidence
20-year base term ended Apr 20, 2025
Why Medium: A parent in the chain could not be resolved.
Held by Alcon Inc.
Filed Mar 12, 2013 as application 13/797,365 · Granted Aug 18, 2015
Base term, 20 years from filing
Today
Term ended Apr 20, 2025
2005
2026
Clock starts
Apr 20, 2005
Apr 20, 2005
Term ended
Apr 20, 2025
Apr 20, 2025
Granted
Aug 18, 2015
Aug 18, 2015
base term
after the term ends
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 7,883,505, US 8,394,083, US 8,475,439, to Apr 20, 2025. The term already ends on or before that date, so the cap shortened nothing.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
5
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. Confidence: Medium. 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 Apr 20, 2005, when application 11/110,653, the earliest non-provisional in its chain, was filed (this one was filed Mar 12, 2013); a parent in its chain could not be resolved (the next row) | Apr 20, 2025 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,883,505, US 8,394,083, US 8,475,439) | resolves to Apr 20, 2025, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Apr 20, 2025 | Medium confidence |
This family
| US 7,883,505 | In force Nov 2028 | Nov 2028 |
| US 8,394,083 | Term ended Apr 2025 | Apr 2025 |
| US 8,475,439 | Term ended Apr 2025 | Apr 2025 |
| US 9,107,612 | this patent Apr 2025 | Apr 2025 |
| US 9,420,949 | Term ended Apr 2025 | Apr 2025 |
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 |
|---|---|---|---|
| Mar 17, 2014 Reel 32457, frame 590 | Van Heugten, Anthony Y.; Durrie, Daniel S. | Wavetec Vision Systems, Inc. | Assignment of Assignor's Interest |
| Feb 9, 2017 Reel 41671, frame 59 | Wavetec Vision Systems, Inc. | Alcon Research, Ltd. | Merger |
| Feb 9, 2017 Reel 41671, frame 398 | Alcon Research, Ltd. | Novartis AG | Assignment of Assignor's Interest |
| Dec 10, 2019 Reel 51454, frame 788 | Novartis AG | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,883,505, US 8,394,083, US 8,475,439, ends no earlier than this term, so it caps nothing.
Citations
6
later US patents cite this one
That is below the median 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.