Term ends Oct 15, 2028 · Medium confidence
20-year base term ends Jan 29, 2028
Why Medium: A parent in the chain could not be resolved.
No current holder resolved from the recorded chain.
Filed May 31, 2012 as application 13/485,836 · Granted Dec 23, 2014
Base term plus 260 days of patent term adjustment (USPTO delay)
Today
2008
2028
Clock starts
Jan 29, 2008
Jan 29, 2008
Term ends
Oct 15, 2028
Oct 15, 2028
Granted
Dec 23, 2014
Dec 23, 2014
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
260
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
6
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 260 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 29, 2008, when application 12/021,856, the earliest non-provisional in its chain, was filed (this one was filed May 31, 2012); a parent in its chain could not be resolved (the next row) | Jan 29, 2028 | 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 | +260 days, USPTO patent term adjustment record | Oct 15, 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 15, 2028 | Medium confidence |
This family
| Application 12/021,856 | Abandoned not computed | not computed |
| Application PCT/US2008/052781 | PCT application no patent term | no patent term |
| US 8,380,880 | In force Dec 2028 | Dec 2028 |
| Application PCT/US2010/058364 | PCT application no patent term | no patent term |
| US 8,918,511 | this patent Oct 2028 | Oct 2028 |
| Application 14/577,132 | Abandoned not computed | not computed |
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.
What's changing
Oct 2028
Term ends Oct 15, 2028.
Note
The 260 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
6
later US patents cite this one
That is below the median of utility patents granted in 2014 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.