Rapid Decryption of Data by Key Synchronization and Indexing

US RE41,919 Lapsed on the fee record

Lapsed Apr 17, 2019 on the fee record · Low confidence

Computed 20-year base term

Third maintenance fee unpaid; grace period ended.

Reissue of US 7,206,411, which was surrendered when this reissue was granted; its term and maintenance fees continue here.

Held by Nytell Software LLC

Filed Apr 16, 2009 as application 12/425,314 · Granted Nov 9, 2010

Base term, 20 years from filing, plus 749 days of patent term adjustment (USPTO delay)

Today

Lapsed Apr 17, 2019

2003 2026

Clock starts
Aug 13, 2003

No longer in force
Apr 17, 2019

Granted
Nov 9, 2010

Term would have run to
Aug 31, 2025

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

749

Days of term adjustment

Read from the original patent's USPTO patent term adjustment record, which governs a reissue. Not recalculated here.

None

Terminal disclaimer

No disclaimer on this record.

2 of 3

Maintenance fees paid

Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from the original patent's grant (Apr 17, 2007). This counts the ones the record shows paid.

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, 2003, when the earliest non-provisional application in its chain was filed (this one was filed Apr 16, 2009)	Aug 13, 2023	High confidence
Continuity chain	A reissue: its term follows the original patent's, with the original's term adjustment	follows the original patent	Medium confidence
Patent term adjustment	+749 days, the original patent's USPTO patent term adjustment record, which governs a reissue (35 U.S.C. 251). This reissue's own record carries none	Aug 31, 2025	Medium confidence
Terminal disclaimer cap	None on record	no cap applied	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	2 of 3 maintenance fees paid	lapsed Apr 17, 2019	High confidence
Computed term end	The steps above, in order	Apr 17, 2019	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.

Rapid Decryption of Data by Key Synchronization and Indexing

Lapsed Apr 17, 2019 on the fee record · Low confidence

20-year base term ended Aug 13, 2023

How we calculated this date

Sources