Term ends Apr 18, 2033 · High confidence
20-year base term ends Apr 18, 2033
Held by Proterial, Ltd.
Filed Feb 24, 2015 as application 14/630,360 · Granted Jan 9, 2018
Base term plus 190 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2013
2033
Clock starts
Apr 18, 2013
Apr 18, 2013
Term ends
Apr 18, 2033
Apr 18, 2033
Granted
Jan 9, 2018
Jan 9, 2018
base term
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
190
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 9,000,301, US 9,463,756.
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.
9
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 190 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Apr 18, 2013, when application 13/865,881, the earliest non-provisional in its chain, was filed (this one was filed Feb 24, 2015) | Apr 18, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +190 days, USPTO patent term adjustment record | Oct 25, 2033 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,000,301, US 9,463,756) | capped to Apr 18, 2033 | 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 | Apr 18, 2033 | High confidence |
This family
| US 9,000,301 | In force Apr 2033 | Apr 2033 |
| US 9,862,336 | this patent Apr 2033 | Apr 2033 |
| US 9,463,756 | In force Apr 2033 | Apr 2033 |
| US 9,902,347 | In force Apr 2033 | Apr 2033 |
| US 10,279,756 | In force no later than Apr 2033 | no later than Apr 2033 |
| US 11,077,806 | In force no later than Apr 2033 | no later than Apr 2033 |
| US 11,987,188 | In force Apr 2033 | Apr 2033 |
| US 12,109,954 | In force Apr 2033 | Apr 2033 |
8 of 9 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 |
|---|---|---|---|
| Aug 2, 2016 Reel 39549, frame 445 | Hitachi Metals, Ltd. | Hitachi Metals, Ltd. | Change of Name |
| Dec 27, 2023 Reel 66130, frame 563 | Hitachi Metals, Ltd. | Proterial, Ltd. | Change of Name |
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 2033
Term ends Apr 18, 2033. Maintenance fees still fall due before then
Note
The 190 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 9,000,301, US 9,463,756.
Citations
21
later US patents cite this one
That is top 25% of utility patents granted in 2018 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.