Also listed on Hitachi Cable Fine-Tech, Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 11, 2033 · High confidence
20-year base term ends Mar 11, 2033
Held by Hitachi Metals Ltd.
Filed Mar 11, 2013 as application 13/793,955 · Granted Dec 30, 2014
Base term, 20 years from filing
Today
2013
2033
Clock starts
Mar 11, 2013
Mar 11, 2013
Term ends
Mar 11, 2033
Mar 11, 2033
Granted
Dec 30, 2014
Dec 30, 2014
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.
3 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.
This patent's term is its 20-year base term, with no adjustment for prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Mar 11, 2013, when this application, 13/793,955, was filed | Mar 11, 2033 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 11, 2033 | High confidence |
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 |
|---|---|---|---|
| Mar 11, 2013 Reel 29965, frame 649 | Egami, Kenichi; Watanabe, Kazuyuki | Hitachi Cable, Ltd.; Hitachi Cable Fine-Tech, Ltd. | Assignment of Assignor's Interest |
| Mar 11, 2013 reel/frame not recorded | Egami, Kenichi; Watanabe, Kazuyuki | Hitachi Cable, Ltd. | Assignment of Assignor's Interest |
| Mar 11, 2013 reel/frame not recorded | Egami, Kenichi; Watanabe, Kazuyuki | Hitachi Cable Fine-Tech, Ltd. | Assignment of Assignor's Interest |
| Feb 5, 2014 Reel 32163, frame 66 | Hitachi Cable, Ltd. | Hitachi Metals, Ltd. | Merger |
| Sep 4, 2014 Reel 33668, frame 671 | Hitachi Cable Fine-Tech, Ltd. | Hitachi Metals 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Mar 2033
Term ends Mar 11, 2033. No further fees fall due before then
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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.