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

Term ends no later than Jan 15, 2029 · 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 Cadence Design Systems, Inc.

Filed Nov 17, 2004 as application 10/992,165 · Granted Jun 15, 2010

Base term plus 1520 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Ends no later than Jan 15, 2029

2004 2029

Clock starts
Nov 17, 2004

Ends no later than
Jan 15, 2029

Granted
Jun 15, 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

1,520

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.

This patent's term runs 1520 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 Nov 17, 2004, when this application, 10/992,165, was filed	Nov 17, 2024	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+1520 days, USPTO patent term adjustment record	Jan 15, 2029	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 Jan 15, 2029	Medium confidence

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 18, 2004 Reel 16013, frame 527	Quayle, Barton L.; Poplack, Mitchell G.; Tannerbaum, Peter	Quickturn Design Systems, Inc.	Assignment of Assignor's Interest
Sep 17, 2009 Reel 23249, frame 281	Quayle, Barton L.; Poplack, Mitchell G.; Tannenbaum, Peter	Quickturn Design Systems Inc.	Corrective Assignment to Correct the Typograpical Error in the Spelling of MR. Tannenbaum's Last Name on the Recordation Form Previously Recorded on Reel 016013 Frame 0527. Assignor(S) Hereby Confirms the Peter Tannerbaum's Name Was Incorrectly Spelled Tannerbaum on the Recordation Form.
Mar 1, 2012 Reel 27789, frame 450	Quickturn Design Systems, 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

Jan 2029

Term ends no later than Jan 15, 2029. 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 1520 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 Jan 15, 2029. We will not guess the cap.

Citations

later US patents cite this one

That is below 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.

System and Method for Configuring Communication Systems