Term ended May 24, 2026 · High confidence
20-year base term ends May 13, 2029
Held by Synopsys, Inc.
Filed May 13, 2009 as application 12/465,562 · Granted Mar 19, 2013
Base term plus 747 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Term ended May 24, 2026
2009
2029
Clock starts
May 13, 2009
May 13, 2009
Term ended
May 24, 2026
May 24, 2026
Granted
Mar 19, 2013
Mar 19, 2013
base term
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
747
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 7,560,201.
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.
5
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 747 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. All three maintenance fees were paid, so no fee lapse ended it. 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 May 13, 2009, when this application, 12/465,562, was filed | May 13, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +747 days, USPTO patent term adjustment record | May 30, 2031 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,560,201) | capped to May 24, 2026 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | May 24, 2026 | High confidence |
This family
| US 7,537,866 | In force Feb 2028 | Feb 2028 |
| US 7,560,201 | Term ended May 2026 | May 2026 |
| US 8,399,183 | this patent May 2026 | May 2026 |
| Application PCT/US2009/055615 | PCT application no patent term | no patent term |
| US 8,592,109 | In force May 2029 | May 2029 |
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 13, 2009 Reel 22681, frame 413 | Liu, Tsu-jae King | Synopsys, Inc. | 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
The 747 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 7,560,201.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2013 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.