Also listed on Ipg Electronics 503 Limited, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 19, 2033 · High confidence
20-year base term ended Mar 30, 2021
Held by Maxell, Ltd.
Filed Mar 30, 2001 as application 09/822,436 · Granted Feb 3, 2015
Base term plus 4372 days of patent term adjustment (USPTO delay)
Today
2001
2033
Clock starts
Mar 30, 2001
Mar 30, 2001
Term ends
Mar 19, 2033
Mar 19, 2033
Granted
Feb 3, 2015
Feb 3, 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
4,372
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.
This patent's term runs 4372 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 Mar 30, 2001, when this application, 09/822,436, was filed | Mar 30, 2021 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +4372 days, USPTO patent term adjustment record | Mar 19, 2033 | 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 19, 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 30, 2001 Reel 11686, frame 798 | Dimitrova, Nevenka; Jasinschi, Radu | Koninklijke Philips Electronics N.V. | Assignment of Assignor's Interest |
| Feb 4, 2009 Reel 22203, frame 791 | Koninklijke Philips Electronics N.V. | Ipg Electronics 503 Limited | Assignment of Assignor's Interest |
| Dec 20, 2011 Reel 27497, frame 1 | Ipg Electronics 503 Limited | Funai Electric Co., Ltd. | Assignment of Assignor's Interest |
| May 31, 2023 Reel 63815, frame 716 | Funai Electric Co., Ltd. | Funai Electric Holdings Co., Ltd. | Assignment of Assignor's Interest |
| Jun 2, 2023 Reel 63843, frame 907 | Funai Electric Co., Ltd. | Funai Electric Holdings Co., Ltd. | Corrective Assignment to Correct the Nature of Conveyance Previously Recorded at Reel: 063815 Frame: 0716. Assignor(S) Hereby Confirms the Change of Name. |
| Jun 26, 2023 Reel 64093, frame 487 | Funai Electric Holdings Co., Ltd. | Funai Electric Co., Ltd. | Assignment of Assignor's Interest |
| Oct 18, 2023 Reel 65264, frame 953 | Funai Electric Co., Ltd. | Maxell, 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 19, 2033. No further fees fall due before then
Note
The 4372 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
280
later US patents cite this one
That is top 1% 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.