Term ends Dec 31, 2029 · High confidence
20-year base term ends Aug 2, 2027
Held by Proterial, Ltd.
Filed Jan 30, 2009 as application 12/375,921 · Granted Jul 16, 2013
Base term plus 882 days of patent term adjustment (USPTO delay)
Today
2007
2029
Clock starts
Aug 2, 2007
Aug 2, 2007
Term ends
Dec 31, 2029
Dec 31, 2029
Granted
Jul 16, 2013
Jul 16, 2013
base term
patent term adjustment
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
882
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
3
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 882 days past its 20-year base term on 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 Aug 2, 2007, when application PCT/JP2007/065577, the earliest non-provisional in its chain, was filed (this one was filed Jan 30, 2009) | Aug 2, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +882 days, USPTO patent term adjustment record | Dec 31, 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 31, 2029 | High confidence |
This family
| US 8,485,219 | this patent Dec 2029 | Dec 2029 |
| US 8,857,461 | In force Aug 2027 | Aug 2027 |
2 of 3 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 |
|---|---|---|---|
| Jan 30, 2009 Reel 22184, frame 173 | Goto, Takao; Tanaka, Makoto | Hitachi Metals, Ltd. | Assignment of Assignor's Interest |
| Sep 11, 2024 Reel 68943, frame 854 | Hitachi Metals, Ltd. | Hitachi Metals, Ltd. | Change of Address |
| Sep 11, 2024 Reel 68944, frame 752 | Hitachi Metals, Ltd. | Proterial, Ltd. | Change of Name |
| Jan 21, 2025 Reel 69959, frame 507 | Hitachi Metals, Ltd. | Hitachi Metals, Ltd. | Corrective Assignment to Correct the Changing Patent Number 8671972 to 8504311 Previously Recorded at Reel: 68943 Frame: 854. Assignor(S) Hereby Confirms the Change of Address. |
| Jan 21, 2025 Reel 69959, frame 644 | Hitachi Metals, Ltd. | Hitachi Metals, Ltd. | Corrective Assignment to Correct the the Patent Number from 8671972 to 8504311 Previously Recorded on Reel 68943 Frame 622. Assignor(S) Hereby Confirms the Change of Address. |
| Jan 21, 2025 Reel 69959, frame 902 | Hitachi Metals, Ltd. | Proterial, Ltd. | Corrective Assignment to Correct the Patent Number from 8671972 to 8504311 Previously Recorded on Reel 68944 Frame 752. Assignor(S) Hereby Confirms the 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Dec 2029
Term ends Dec 31, 2029. No further fees fall due before then
Note
The 882 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
412
later US patents cite this one
That is top 1% of utility patents granted in 2013 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.