Also listed on Invarium, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 12, 2027 · High confidence
20-year base term ended Oct 6, 2024
Held by Cadence Design Systems, Inc.
Filed Oct 22, 2004 as application 10/971,350 · Granted Sep 15, 2009
Base term plus 1040 days of patent term adjustment (USPTO delay)
Today
2004
2027
Clock starts
Oct 6, 2004
Oct 6, 2004
Term ends
Aug 12, 2027
Aug 12, 2027
Granted
Sep 15, 2009
Sep 15, 2009
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,040
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.
11
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 1040 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 Oct 6, 2004, when application 10/960,357, the earliest non-provisional in its chain, was filed (this one was filed Oct 22, 2004) | Oct 6, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1040 days, USPTO patent term adjustment record | Aug 12, 2027 | 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 | Aug 12, 2027 | High confidence |
This family
| US 7,275,225 | Term ended Apr 2025 | Apr 2025 |
| US 7,277,165 | Term ended May 2025 | May 2025 |
| US 7,266,800 | Term ended Apr 2025 | Apr 2025 |
| US 7,246,343 | Term ended Apr 2025 | Apr 2025 |
| US 7,189,481 | Lapsed on the fee record Mar 2019 | Mar 2019 |
| US 7,337,421 | Term ended Aug 2025 | Aug 2025 |
| Application 10/960,357 | Abandoned not computed | not computed |
| US 7,588,868 | this patent Aug 2027 | Aug 2027 |
8 of 11 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 |
|---|---|---|---|
| Mar 8, 2005 Reel 15858, frame 885 | Zach, Franz X.; Sezginer, Abdurrahman; Percin, Gokhan | Invarium, Inc. | Assignment of Assignor's Interest |
| Jun 19, 2008 Reel 21121, frame 930 | Invarium, Inc. | Cadence Design Systems, 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
Aug 2027
Term ends Aug 12, 2027. No further fees fall due before then
Note
The 1040 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
30
later US patents cite this one
That is top 25% of utility patents granted in 2009 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.