Two-Layer Display-Refresh and Video-Overlay Arbitration of Both DRAM and SRAM Memories

US 6,977,656 Surrendered on reissue

Overview Sources & methods

Surrendered on reissue Aug 7, 2012 · Low confidence

Computed 20-year base term

Surrendered on reissue Aug 7, 2012 · its term and maintenance fees continue in US RE43,565.

Held by Intellectual Ventures I LLC

Filed Jul 28, 2003 as application 10/604,524 · Granted Dec 20, 2005

Base term, 20 years from filing, plus 103 days of patent term adjustment (USPTO delay)

Today

Surrendered Aug 7, 2012

2003 2026

Clock starts
Jul 28, 2003

No longer in force
Aug 7, 2012

Granted
Dec 20, 2005

Term would have run to
Nov 8, 2023

base term patent term adjustment after the term ends 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

103

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

None

Terminal disclaimer

No disclaimer on this record.

1 of 3

Maintenance fees paid

Fees paid on this patent before its reissue. Those after fall due on the reissue, which carries the term on.

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 Jul 28, 2003, when this application, 10/604,524, was filed	Jul 28, 2023	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+103 days, USPTO patent term adjustment record	Nov 8, 2023	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	No fee event states this; the fee state is read from the payments the fee record holds; the fee record shows no payment for this window, and USPTO's status still reads "Patented Case"	no change	Low confidence
Reissue	US RE43,565 issued Aug 7, 2012, and this patent's term continues in it (35 U.S.C. 251, 252)	surrendered Aug 7, 2012	High confidence
Surrendered on reissue	The steps above, in order	Aug 7, 2012	Low confidence

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.

Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.

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.

Two-Layer Display-Refresh and Video-Overlay Arbitration of Both DRAM and SRAM Memories

Surrendered on reissue Aug 7, 2012 · Low confidence

20-year base term ended Jul 28, 2023

How we calculated this date

Sources