Term ends Feb 19, 2029 · High confidence
20-year base term ended Feb 28, 2025
Held by Maxell, Ltd.
Filed Feb 28, 2005 as application 11/066,169 · Granted Jul 22, 2014
Base term plus 1452 days of patent term adjustment (USPTO delay)
Today
2005
2029
Clock starts
Feb 28, 2005
Feb 28, 2005
Term ends
Feb 19, 2029
Feb 19, 2029
Granted
Jul 22, 2014
Jul 22, 2014
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
1,452
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.
13
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 1452 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 Feb 28, 2005, when this application, 11/066,169, was filed | Feb 28, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1452 days, USPTO patent term adjustment record | Feb 19, 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 | Feb 19, 2029 | High confidence |
This family
| US 8,787,456 | this patent Feb 2029 | Feb 2029 |
| US 8,923,387 | Term ended Feb 2025 | Feb 2025 |
| US 8,971,403 | Term ended Feb 2025 | Feb 2025 |
| US 9,118,924 | Term ended Feb 2025 | Feb 2025 |
| US 9,319,687 | Term ended Feb 2025 | Feb 2025 |
| US 9,277,225 | Term ended Feb 2025 | Feb 2025 |
| US 9,277,226 | Term ended Feb 2025 | Feb 2025 |
| US 9,270,998 | Term ended Feb 2025 | Feb 2025 |
8 of 13 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 11, 2005 Reel 16556, frame 719 | Murakami, Tomokazu; Suzuki, Yoshinori | Hitachi, Ltd. | Assignment of Assignor's Interest |
| Sep 2, 2011 Reel 26850, frame 536 | Hitachi, Ltd. | Hitachi Consumer Electronics, Co. Ltd. | Assignment of Assignor's Interest |
| Sep 8, 2014 Reel 33694, frame 745 | Hitachi Consumer Electronics Co., Ltd.; Hitachi Consumer Electronics Co., Ltd. | Hitachi Maxell, Ltd. | Assignment of Assignor's Interest |
| Jan 25, 2018 Reel 45142, frame 208 | Hitachi Maxell, Ltd. | Maxell, Ltd. | Assignment of Assignor's Interest |
| Nov 29, 2021 Reel 58255, frame 579 | Maxell, Ltd. | Maxell Holdings, Ltd. | Merger |
| Dec 3, 2021 Reel 58666, frame 407 | Maxell Holdings, Ltd. | Maxell, Ltd. | 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
Feb 2029
Term ends Feb 19, 2029. No further fees fall due before then
Note
The 1452 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
82
later US patents cite this one
That is top 10% 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.