Term ends Nov 13, 2028 · High confidence
20-year base term ended Apr 20, 2025
Held by Alcon Inc.
Filed Apr 20, 2005 as application 11/110,653 · Granted Feb 8, 2011
Base term plus 1303 days of patent term adjustment (USPTO delay)
Today
2005
2028
Clock starts
Apr 20, 2005
Apr 20, 2005
Term ends
Nov 13, 2028
Nov 13, 2028
Granted
Feb 8, 2011
Feb 8, 2011
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
1,303
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
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 runs 1303 days past its 20-year base term on 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 Apr 20, 2005, when this application, 11/110,653, was filed | Apr 20, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1303 days, USPTO patent term adjustment record | Nov 13, 2028 | 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 | High confidence |
| Computed term end | The steps above, in order | Nov 13, 2028 | High confidence |
This family
| US 7,883,505 | this patent 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 | Term ended 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 |
|---|---|---|---|
| Apr 20, 2005 Reel 16495, frame 827 | 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.
What's changing
Nov 2028
Term ends Nov 13, 2028. No further fees fall due before then
Note
The 1303 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
131
later US patents cite this one
That is top 5% of utility patents granted in 2011 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.