Surrendered on reissue May 2, 2017 · Medium confidence
20-year base term ends Apr 6, 2032
Why Medium: No fee event states this; the fee state is read from the payments the fee record holds.
Surrendered on reissue May 2, 2017 · its term and maintenance fees continue in US RE46,382.
Held by Sanbio, Inc.
Filed Apr 6, 2012 as application 13/441,311 · Granted Jul 22, 2014
Base term, 20 years from filing
Today
Surrendered May 2, 2017
2012
2032
Clock starts
Apr 6, 2012
Apr 6, 2012
No longer in force
May 2, 2017
May 2, 2017
Granted
Jul 22, 2014
Jul 22, 2014
Term would have run to
Apr 6, 2032
Apr 6, 2032
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
Not on record
Maintenance fees
USPTO's record of this patent carries no fee events. A gap in the record, not evidence of lapse.
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 is its 20-year base term, with no adjustment for prosecution delay. USPTO's record of this patent carries no fee events, so no fee is counted as paid or unpaid. 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 Apr 6, 2012, when this application, 13/441,311, was filed | Apr 6, 2032 | 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 | No fee events in USPTO's record of this patent. A gap in the record, not evidence of lapse | no change | Medium confidence |
| Reissue | US RE46,382 issued May 2, 2017, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered May 2, 2017 | High confidence |
| Surrendered on reissue | The steps above, in order | May 2, 2017 | Medium confidence |
This family
| US 8,785,190 | this patent May 2017 | May 2017 |
| US 9,655,927 | In force Apr 2032 | Apr 2032 |
| US RE46,382 | In force Apr 2032 | Apr 2032 |
| US 10,543,234 | In force Apr 2032 | Apr 2032 |
| US 11,903,972 | In force no later than Apr 2035 | no later than Apr 2035 |
| Application 18/408,002 | Pending not computed | not computed |
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 |
|---|---|---|---|
| Jun 21, 2012 Reel 28422, frame 516 | Dao, Mo; Case, Casey C. | Sanbio, 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.
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Alerts on its grants, lapses and transfers.
Citations
17
later US patents cite this one
That is above 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.