Term ends Jul 27, 2029 · High confidence
20-year base term ends Jun 4, 2029
Held by Maxell, Ltd.
Filed Dec 21, 2012 as application 13/723,312 · Granted Sep 1, 2015
Base term plus 53 days of patent term adjustment (USPTO delay)
Today
2009
2029
Clock starts
Jun 4, 2009
Jun 4, 2009
Term ends
Jul 27, 2029
Jul 27, 2029
Granted
Sep 1, 2015
Sep 1, 2015
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
53
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,363,087, to Jul 27, 2029. The term already ends on or before that date, so the cap shortened nothing.
2 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 53 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. 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 Jun 4, 2009, when application 12/457,257, the earliest non-provisional in its chain, was filed (this one was filed Dec 21, 2012) | Jun 4, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +53 days, USPTO patent term adjustment record | Jul 27, 2029 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,363,087) | resolves to Jul 27, 2029, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 27, 2029 | High confidence |
This family
| US 8,363,087 | In force Feb 2031 | Feb 2031 |
| US 9,124,758 | this patent Jul 2029 | Jul 2029 |
| US 9,432,618 | In force Jun 2029 | Jun 2029 |
| US 9,723,268 | In force Jun 2029 | Jun 2029 |
| US 10,070,099 | In force Jun 2029 | Jun 2029 |
| US 10,084,991 | In force Jun 2029 | Jun 2029 |
| US 10,389,978 | In force Jun 2029 | Jun 2029 |
| US 10,911,719 | In force Jun 2029 | Jun 2029 |
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 |
|---|---|---|---|
| Dec 21, 2012 Reel 29515, frame 319 | Iwabuchi, Kazunori; Mizosoe, Hiroki; Shimoda, Mutsumi; Bondan, Setiawan; Sasamoto, Manabu | Hitachi, Ltd. | Assignment of Assignor's Interest |
| Jun 12, 2013 Reel 30598, frame 284 | Hitachi, Ltd. | Hitachi Consumer Electronics Co., Ltd. | Assignment of Assignor's Interest |
| Sep 11, 2014 Reel 33718, frame 268 | 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
Jul 2029
Term ends Jul 27, 2029. Maintenance fees still fall due before then
Note
The 53 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,363,087, ends no earlier than this term, so it caps nothing.
Citations
26
later US patents cite this one
That is top 25% of utility patents granted in 2015 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.