Lapsed Nov 5, 2025 on the fee record · High confidence
20-year base term ends Dec 12, 2026
Third maintenance fee unpaid; grace period ended.
No current holder resolved from the recorded chain.
Filed May 3, 2011 as application 13/099,762 · Granted Nov 5, 2013
Base term, 20 years from filing
Today
Lapsed Nov 5, 2025
2006
2026
Clock starts
Dec 12, 2006
Dec 12, 2006
No longer in force
Nov 5, 2025
Nov 5, 2025
Granted
Nov 5, 2013
Nov 5, 2013
Term would have run to
Dec 12, 2026
Dec 12, 2026
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.
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.
7
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Dec 12, 2026: its 20-year base term, with no adjustment for prosecution delay. 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 Dec 12, 2006, when application 11/637,516, the earliest non-provisional in its chain, was filed (this one was filed May 3, 2011) | Dec 12, 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 | 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 | lapsed Nov 5, 2025 | High confidence |
| Computed term end | The steps above, in order | Nov 5, 2025 | High confidence |
This family
| US 7,935,363 | In force Jul 2027 | Jul 2027 |
| US 9,820,847 | Lapsed on the fee record Nov 2025 | Nov 2025 |
| US 8,574,620 | this patent Nov 2025 | Nov 2025 |
| US 8,808,730 | Lapsed on the fee record Aug 2026 | Aug 2026 |
| US 9,216,194 | In force Dec 2026 | Dec 2026 |
| Application 14/978,585 | Abandoned not computed | not computed |
6 of 7 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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.
Citations
0
later US patents cite this one
That is below the median 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.