Also listed on Synplicity, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 18, 2029 · High confidence
20-year base term ended Jul 23, 2023
Filed Jul 23, 2003 as application 10/626,031 · Granted May 17, 2011
Base term plus 2065 days of patent term adjustment (USPTO delay)
Today
2003
2029
Clock starts
Jul 23, 2003
Jul 23, 2003
Term ends
Mar 18, 2029
Mar 18, 2029
Granted
May 17, 2011
May 17, 2011
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
2,065
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.
4
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 2065 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 Jul 23, 2003, when this application, 10/626,031, was filed | Jul 23, 2023 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2065 days, USPTO patent term adjustment record | Mar 18, 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 | Mar 18, 2029 | High confidence |
This family
| US 7,943,436 | this patent Mar 2029 | Mar 2029 |
| US 7,739,624 | Term ended Jan 2025 | Jan 2025 |
| US 8,701,068 | Term ended Jul 2023 | Jul 2023 |
3 of 4 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 |
|---|---|---|---|
| Jul 23, 2003 Reel 14334, frame 932 | McElvain, Kenneth S. | Synplicity, Inc. | Assignment of Assignor's Interest |
| Jun 20, 2008 Reel 21145, frame 414 | Synplicity, Inc. | Synopsys, Inc., a Delaware Corporation | Merger |
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 2029
Term ends Mar 18, 2029. No further fees fall due before then
Note
The 2065 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
62
later US patents cite this one
That is top 10% of utility patents granted in 2011 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.