Lapsed Oct 23, 2019 on the fee record · Medium confidence
20-year base term ended Feb 10, 2024
Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.
Third maintenance fee unpaid; grace period ended.
Held by Ixys Intl Limited
Filed Aug 27, 2004 as application 10/928,576 · Granted Oct 23, 2007
Base term, 20 years from filing, plus 242 days of patent term adjustment (USPTO delay)
Today
Lapsed Oct 23, 2019
2004
2026
Clock starts
Feb 10, 2004
Feb 10, 2004
No longer in force
Oct 23, 2019
Oct 23, 2019
Granted
Oct 23, 2007
Oct 23, 2007
Term would have run to
Oct 9, 2024
Oct 9, 2024
base term
patent term adjustment
after the term ends
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
242
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
10
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 Oct 9, 2024: its 20-year base term plus 242 days of term adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Medium. 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 10, 2004, when application 10/777,023, the earliest non-provisional in its chain, was filed (this one was filed Aug 27, 2004) | Feb 10, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +242 days, USPTO patent term adjustment record | Oct 9, 2024 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Oct 23, 2019 | High confidence |
| Computed term end | The steps above, in order | Oct 23, 2019 | Medium confidence |
This family
| US 7,259,696 | Term ended Aug 2025 | Aug 2025 |
| US 7,339,513 | Term ended Oct 2024 | Oct 2024 |
| US 7,286,076 | this patent Oct 2019 | Oct 2019 |
| US 7,936,287 | Term ended Aug 2026 | Aug 2026 |
| US 8,952,840 | In force no later than Dec 2028 | no later than Dec 2028 |
| US 8,174,411 | Term ended Feb 2024 | Feb 2024 |
| US 9,792,133 | Term ended Aug 2024 | Aug 2024 |
| US 9,542,212 | Term ended no later than Jun 2024 | no later than Jun 2024 |
8 of 10 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 |
|---|---|---|---|
| Aug 27, 2004 Reel 15745, frame 470 | Provis, Adam P. G.; Miramontes, Oscar C.; Vergis, George C. | Zilog, Inc. | Assignment of Assignor's Interest |
| Mar 4, 2009 Reel 22343, frame 395 | Zilog, Inc.; Zilog International, Ltd. | Uei Cayman Inc. | Assignment of Assignor's Interest |
| Mar 23, 2011 Reel 26002, frame 1 | Uei Cayman Inc. | Ixys CH GmbH | Assignment of Assignor's Interest |
| May 19, 2015 Reel 35666, frame 816 | Ixys CH GmbH | Ixys Intl Limited | 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
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 242 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Oct 23, 2019. We will not guess the cap.
Citations
13
later US patents cite this one
That is above the median of utility patents granted in 2007 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.