Term ends Apr 30, 2035 · High confidence
20-year base term ends Apr 30, 2035
Held by Tokyo Electron Limited
Filed Apr 30, 2015 as application 14/700,593 · Granted Sep 13, 2016
Base term, 20 years from filing
Today
2015
2035
Clock starts
Apr 30, 2015
Apr 30, 2015
Term ends
Apr 30, 2035
Apr 30, 2035
Granted
Sep 13, 2016
Sep 13, 2016
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
None
Term adjustment
No prosecution delay on this record.
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.
47
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. 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 30, 2015, when this application, 14/700,593, was filed | Apr 30, 2035 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 30, 2035 | High confidence |
This family
| Application 14/691,656 | Abandoned not computed | not computed |
| US 9,441,291 | this patent Apr 2035 | Apr 2035 |
| US 9,601,318 | In force May 2035 | May 2035 |
| US 10,151,028 | In force May 2036 | May 2036 |
| US 9,623,516 | In force Jun 2035 | Jun 2035 |
| US 10,233,535 | In force Apr 2037 | Apr 2037 |
| US 9,885,612 | Lapsed on the fee record Feb 2026 | Feb 2026 |
| US 9,711,370 | In force Aug 2035 | Aug 2035 |
8 of 47 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 |
|---|---|---|---|
| Apr 30, 2015 Reel 35538, frame 428 | Kumagai, Takeshi; Otani, Muneyuki | Tokyo Electron Limited | 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.
What's changing
Apr 2035
Term ends Apr 30, 2035. Maintenance fees still fall due before then
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2016 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.