Term ended Jan 9, 2026 · Medium confidence
20-year base term ended Jan 9, 2026
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 8,403,921, US 8,425,497), so the cap could be lower.
Held by Amo Development, LLC
Filed Mar 25, 2011 as application 13/072,646 · Granted Aug 6, 2013
Base term, 20 years from filing
Today
Term ended Jan 9, 2026
2006
2026
Clock starts
Jan 9, 2006
Jan 9, 2006
Term ended
Jan 9, 2026
Jan 9, 2026
Granted
Aug 6, 2013
Aug 6, 2013
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 8,394,084, US 8,403,921, US 8,425,497, to Jan 9, 2026. The term already ends on or before that date, so the cap shortened nothing.
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.
27
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. All three maintenance fees were paid, so no fee lapse ended it. 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 Jan 9, 2006, when application 11/328,970, the earliest non-provisional in its chain, was filed (this one was filed Mar 25, 2011) | Jan 9, 2026 | 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 | Disclaimer resolved from the filed document (refs US 8,394,084, US 8,403,921, US 8,425,497) | resolves to Jan 9, 2026, no earlier than this term, so no change | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Jan 9, 2026 | Medium confidence |
This family
| US 8,394,084 | In force Sep 2028 | Sep 2028 |
| Application 12/510,148 | Abandoned not computed | not computed |
| US 8,500,724 | this patent Jan 2026 | Jan 2026 |
| US 8,425,497 | Term ended no later than Jan 2026 | no later than Jan 2026 |
| US 8,403,921 | Term ended no later than Jan 2026 | no later than Jan 2026 |
| US 8,709,001 | Term ended Jan 2026 | Jan 2026 |
| US 8,690,862 | Term ended Jan 2026 | Jan 2026 |
| US 9,101,448 | Term ended no later than Jan 2026 | no later than Jan 2026 |
8 of 27 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 |
|---|---|---|---|
| Apr 22, 2013 Reel 30273, frame 493 | Blumenkranz, Mark S.; Palanker, Daniel V.; Mordaunt, David H.; Andersen, Dan E. | Optimedica Corporation | Assignment of Assignor's Interest |
| Apr 8, 2020 Reel 52348, frame 110 | Optimedica Corporation | Amo Development, LLC | Merger |
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 8,394,084, US 8,403,921, US 8,425,497, ends no earlier than this term, so it caps nothing.
Citations
57
later US patents cite this one
That is top 10% of utility patents granted in 2013 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.