Also listed on Invarium, Inc., an earlier holder on the record. The recorded assignments below show how it moved.

Term ends no later than Jul 11, 2028 · Medium confidence

Computed 20-year base term

In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.

Held by Silvaco, Inc.

Filed Aug 13, 2005 as application 11/203,498 · Granted Jun 22, 2010

Base term plus 1063 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Ends no later than Jul 11, 2028

2005 2028

Clock starts
Aug 13, 2005

Ends no later than
Jul 11, 2028

Granted
Jun 22, 2010

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

1,063

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.

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.

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 1063 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. 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 Aug 13, 2005, when this application, 11/203,498, was filed	Aug 13, 2025	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+1063 days, USPTO patent term adjustment record	Jul 11, 2028	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	3 of 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	no later than Jul 11, 2028	Medium confidence

This family

US 7,743,358	this patent no later than Jul 2028	no later than Jul 2028
US 8,122,389	Lapsed on the fee record Feb 2024	Feb 2024

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
Nov 25, 2005 Reel 17256, frame 368	Sezginer, Abdurrahman; Yenikaya, Bayram; Huang, Hsu-tirg	Invarium, Inc.	Assignment of Assignor's Interest
Jun 19, 2008 Reel 21122, frame 763	Invarium, Inc.	Cadence Design Systems, Inc.	Assignment of Assignor's Interest
Mar 14, 2025 Reel 70519, frame 972	Cadence Design Systems, Inc.	Silvaco, 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.

What's changing

Jul 2028

Term ends no later than Jul 11, 2028. No further fees fall due before then

Note

A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed

Note

The 1063 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 Jul 11, 2028. We will not guess the cap.

Citations

later US patents cite this one

That is above the median of utility patents granted in 2010 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

This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.

Apparatus and Method for Segmenting Edges for Optical Proximity Correction