Lapsed Mar 26, 2025 on the fee record · High confidence
20-year base term ends Jan 7, 2031
Third maintenance fee unpaid; grace period ended.
No current holder resolved from the recorded chain.
Filed Jun 22, 2012 as application 13/530,452 · Granted Mar 26, 2013
Base term, 20 years from filing
Today
Lapsed Mar 26, 2025
2011
2031
Clock starts
Jan 7, 2011
Jan 7, 2011
No longer in force
Mar 26, 2025
Mar 26, 2025
Granted
Mar 26, 2013
Mar 26, 2013
Term would have run to
Jan 7, 2031
Jan 7, 2031
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.
17
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 Jan 7, 2031: 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 Jan 7, 2011, when application PCT/US2011/020511, the earliest non-provisional in its chain, was filed (this one was filed Jun 22, 2012) | Jan 7, 2031 | 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 Mar 26, 2025 | High confidence |
| Computed term end | The steps above, in order | Mar 26, 2025 | High confidence |
This family
| US 8,555,999 | In force Jul 2031 | Jul 2031 |
| Application PCT/US2011/020511 | PCT application no patent term | no patent term |
| US 8,286,723 | In force no later than Jan 2031 | no later than Jan 2031 |
| US D657,646 | Term ended Apr 2026 | Apr 2026 |
| US 8,418,778 | In force no later than Jan 2031 | no later than Jan 2031 |
| US 8,403,072 | this patent Mar 2025 | Mar 2025 |
| US 9,321,155 | In force Sep 2032 | Sep 2032 |
| US 9,321,156 | In force Jan 2031 | Jan 2031 |
8 of 17 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
35
later US patents cite this one
That is top 25% 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.