Lapsed Jul 15, 2026 on the fee record · High confidence
20-year base term ends Nov 21, 2026
Third maintenance fee unpaid; grace period ended.
Held by Biotium, Inc.
Filed Dec 14, 2011 as application 13/326,009 · Granted Jul 15, 2014
Base term, 20 years from filing, plus 1 days of patent term adjustment (USPTO delay)
Today
Lapsed Jul 15, 2026
2006
2026
Clock starts
Nov 21, 2006
Nov 21, 2006
No longer in force
Jul 15, 2026
Jul 15, 2026
Granted
Jul 15, 2014
Jul 15, 2014
Term would have run to
Nov 22, 2026
Nov 22, 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
1
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.
5
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 Nov 22, 2026: its 20-year base term plus 1 days of term 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 Nov 21, 2006, when application PCT/US2006/061167, the earliest non-provisional in its chain, was filed (this one was filed Dec 14, 2011) | Nov 21, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1 days, USPTO patent term adjustment record | Nov 22, 2026 | 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 Jul 15, 2026 | High confidence |
| Computed term end | The steps above, in order | Jul 15, 2026 | High confidence |
This family
| Application PCT/US2006/061167 | PCT application no patent term | no patent term |
| US 8,092,784 | In force Jul 2028 | Jul 2028 |
| US 8,778,627 | this patent Jul 2026 | Jul 2026 |
| US 8,586,325 | In force Nov 2026 | Nov 2026 |
| US 9,670,476 | In force Nov 2026 | Nov 2026 |
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 |
|---|---|---|---|
| Dec 14, 2011 Reel 27383, frame 779 | Mao, Fei; Cen, Hui; Leung, Wai-yee | Biotium, Inc. | Assignment of Assignor's Interest |
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
Note
The 1 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.