Term ends no later than Apr 10, 2035 · Low confidence
20-year base term ends Dec 10, 2034
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by Tosoh Bioscience LLC
Filed Jun 8, 2017 as application 15/534,369 · Granted Oct 22, 2019
Base term plus 121 days of patent term adjustment (USPTO delay)
Today
2014
2035
Clock starts
Dec 10, 2014
Dec 10, 2014
Ends no later than
Apr 10, 2035
Apr 10, 2035
Granted
Oct 22, 2019
Oct 22, 2019
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
121
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
1 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.
10
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 121 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 1 of 3 maintenance fees is paid so far. Confidence: Low. 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 Dec 10, 2014, when application PCT/US2014/069580, the earliest non-provisional in its chain, was filed (this one was filed Jun 8, 2017); a parent in its chain could not be resolved (the next row) | Dec 10, 2034 | 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 | +121 days, USPTO patent term adjustment record | Apr 10, 2035 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Apr 10, 2035 | Low confidence |
This family
| US 10,393,276 | In force Dec 2034 | Dec 2034 |
| US 10,451,188 | this patent no later than Apr 2035 | no later than Apr 2035 |
| US 11,054,045 | In force Dec 2034 | Dec 2034 |
| US 11,174,952 | In force Dec 2034 | Dec 2034 |
| US 11,703,133 | In force Dec 2034 | Dec 2034 |
| US 11,773,989 | In force Dec 2034 | Dec 2034 |
| US 12,129,935 | In force no later than Dec 2034 | no later than Dec 2034 |
| US 12,264,756 | In force Dec 2034 | Dec 2034 |
8 of 10 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Jan 10, 2022 Reel 58683, frame 485 | Semba Biosciences, Inc. | Tosoh Bioscience Wisconsin, Inc. | Change of Name |
| Jan 11, 2023 Reel 62346, frame 637 | Tosoh Bioscience Wisconsin, Inc. | Tosoh Bioscience LLC | Merger |
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.
What's changing
Apr 2035
Term ends no later than Apr 10, 2035. Maintenance fees still fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 121 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Apr 10, 2035. We will not guess the cap.
Citations
7
later US patents cite this one
That is above the median of utility patents granted in 2019 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.