0 patents currently held, every record listed here
4 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
This portfolio holds none of the 4 US patents in force on its record. from the record
Of the 4 now held by other companies, 2 name Cadence Design Systems Inc. as their current owner, and 2 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
none
Next term end
When these terms end
Each bar runs from grant to computed term end. 2009 to 2028.
US 7,600,212
Method of Compensating Photomask Data for the Effects of Etch and Lithography Processes
May 7, 2027
US 7,588,868
Method and System for Reducing the Impact of Across-Wafer Variations on Critical Dimension Measurements
Aug 12, 2027
US 7,743,358
Apparatus and Method for Segmenting Edges for Optical Proximity Correction
no later than Jul 11, 2028
20132017202120252028
A dotted end marks a recorded terminal disclaimer this site has not resolved: the term can only be shorter than the bar, never longer.
Every computed term in this portfolio is shown above.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
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
None of the currently held patents qualifies as notable.
Formerly held, still cited
Notable
Ends Dec 2026 · Medium confidence
The most cited patent in this portfolio, cited by 356 later US patents, top 1% of utility patents granted in 2009 in our data. Protection runs to 2026. A terminal disclaimer caps this term to an earlier patent's.
now held by Silvaco, Inc.
Also notable
Ends Aug 2027 · High confidence
Cited by 30 later US patents, top 25% of utility patents granted in 2009 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2027.
now held by Cadence Design Systems, Inc.
Also notable
Ends no later than Jul 2028 · Medium confidence
Renewed at every maintenance window since the 2010 grant; no more fees are due before its term ends in 2028. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.
now held by Silvaco, Inc.
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
Patents held now
Soonest term end first.
Also on record: 4 patents in force now held by others · 22 patents ended · 1 application abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
1 terminal disclaimer is on file with no resolved reference. No cap is applied and none is guessed