Lapsed Sep 18, 2020 on the fee record · High confidence
20-year base term ends Dec 5, 2028
Second maintenance fee unpaid; grace period ended.
Held by NHK Spring Co., Ltd.
Filed May 13, 2010 as application 12/680,129 · Granted Sep 18, 2012
Base term, 20 years from filing, plus 283 days of patent term adjustment (USPTO delay)
Today
Lapsed Sep 18, 2020
2008
2029
Clock starts
Dec 5, 2008
Dec 5, 2008
No longer in force
Sep 18, 2020
Sep 18, 2020
Granted
Sep 18, 2012
Sep 18, 2012
Term would have run to
Sep 14, 2029
Sep 14, 2029
base term
patent term adjustment
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
283
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
8
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Sep 14, 2029: its 20-year base term plus 283 days of term adjustment for prosecution delay. 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 Dec 5, 2008, when application PCT/JP2008/072137, the earliest non-provisional in its chain, was filed (this one was filed May 13, 2010) | Dec 5, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +283 days, USPTO patent term adjustment record | Sep 14, 2029 | 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 3 maintenance fees paid | lapsed Sep 18, 2020 | High confidence |
| Computed term end | The steps above, in order | Sep 18, 2020 | High confidence |
This family
| US 8,047,611 | Lapsed on the fee record Nov 2023 | Nov 2023 |
| US 7,851,728 | In force Jul 2028 | Jul 2028 |
| US 8,492,649 | Lapsed on the fee record Jul 2021 | Jul 2021 |
| US 8,267,356 | this patent Sep 2020 | Sep 2020 |
| US 9,153,463 | In force Feb 2033 | Feb 2033 |
| US 10,276,410 | In force Sep 2032 | Sep 2032 |
6 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 |
|---|---|---|---|
| May 13, 2010 Reel 24379, frame 603 | Ohta, Atsushi; Takahashi, Masanobu; Kobayashi, Shinichi; Ito, Mikio; Murakami, Mitsuru; Ohtomo, Yutaro; Kawamura, Keitaro; Nakagome, Masashi | NHK Spring Co., Ltd. | Assignment of Assignor's Interest |
| Oct 7, 2010 Reel 25103, frame 591 | Ohta, Atsushi; Takahashi, Masanobu; Kobayashi, Shinichi; Ito, Mikio; Murakami, Mitsuru; Ohtomo, Yutaro; Kawamura, Keitaro; Nakagome, Masashi | NHK Spring Co., Ltd. | Corrective Assignment to Correct the Assignee Address Previously Recorded on Reel 024379 Frame 0603. Assignor(S) Hereby Confirms the NHK Spring Co., LTD.. |
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
Note
The 283 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2012 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.