Term ends May 13, 2029 · High confidence
20-year base term ends Oct 29, 2028
No current holder resolved from the recorded chain.
Filed Apr 3, 2013 as application 13/855,923 · Granted Aug 11, 2015
Base term plus 196 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Oct 29, 2008
Oct 29, 2008
Term ends
May 13, 2029
May 13, 2029
Granted
Aug 11, 2015
Aug 11, 2015
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
196
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.
8
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 196 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Oct 29, 2008, when application 12/290,453, the earliest non-provisional in its chain, was filed (this one was filed Apr 3, 2013) | Oct 29, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +196 days, USPTO patent term adjustment record | May 13, 2029 | 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 | May 13, 2029 | High confidence |
This family
| US 8,336,810 | In force Feb 2029 | Feb 2029 |
| US 8,820,681 | Lapsed on the fee record Sep 2026 | Sep 2026 |
| US 9,102,391 | this patent May 2029 | May 2029 |
| US 9,493,223 | In force Feb 2029 | Feb 2029 |
| US 10,308,340 | In force Jun 2029 | Jun 2029 |
| Application 15/705,885 | Abandoned not computed | not computed |
| Application 16/714,129 | Abandoned not computed | not computed |
| Application 17/527,519 | 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
May 2029
Term ends May 13, 2029. Maintenance fees still fall due before then
Note
The 196 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
22
later US patents cite this one
That is top 25% of utility patents granted in 2015 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.