Term ended Mar 21, 2023 · Medium confidence
20-year base term ended Mar 21, 2023
Why Medium: A parent in the chain could not be resolved.
Held by Rohm Co., Ltd., Kido, Junji and Mitsubishi Heavy Industries, Ltd.
Filed May 30, 2018 as application 15/993,516 · Granted Jun 4, 2019
Base term, 20 years from filing
Today
Term ended Mar 21, 2023
2003
2026
Clock starts
Mar 21, 2003
Mar 21, 2003
Term ended
Mar 21, 2023
Mar 21, 2023
Granted
Jun 4, 2019
Jun 4, 2019
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
8
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. 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 Mar 21, 2003, when application 10/393,952, the earliest non-provisional in its chain, was filed (this one was filed May 30, 2018); a parent in its chain could not be resolved (the next row) | Mar 21, 2023 | 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 | 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 | 1 of 1 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Mar 21, 2023 | Medium confidence |
This family
| US 8,080,934 | In force Oct 2029 | Oct 2029 |
| US 8,482,193 | Lapsed on the fee record Jul 2025 | Jul 2025 |
| US 9,070,892 | Term ended Mar 2023 | Mar 2023 |
| US 10,319,949 | Term ended Mar 2023 | Mar 2023 |
| US 10,312,474 | this patent Mar 2023 | Mar 2023 |
| US 10,998,527 | Term ended Mar 2023 | Mar 2023 |
| US 10,217,967 | Term ended Mar 2023 | Mar 2023 |
7 of 8 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 |
|---|---|---|---|
| Sep 26, 2018 Reel 47152, frame 217 | Rohm Co., Ltd. | Rohm Co., Ltd.; Kido, Junji; Mitsubishi Heavy Industries, Ltd. | Assignment of Assignor's Interest |
| Sep 26, 2018 reel/frame not recorded | Rohm Co., Ltd. | Rohm Co., Ltd. | Assignment of Assignor's Interest |
| Sep 26, 2018 reel/frame not recorded | Rohm Co., Ltd. | Kido, Junji | Assignment of Assignor's Interest |
| Sep 26, 2018 reel/frame not recorded | Rohm Co., Ltd. | Mitsubishi Heavy Industries, Ltd. | 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
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
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.