Rapid Decryption of Data by Key Synchronization and Indexing
US 7,206,411 Surrendered on reissueSurrendered on reissue Nov 9, 2010 · Low confidence
20-year base term ended Aug 13, 2023
Surrendered on reissue Nov 9, 2010 · its term and maintenance fees continue in US RE41,919.
Aug 13, 2003
Nov 9, 2010
Apr 17, 2007
Aug 31, 2025
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Aug 13, 2003, when this application, 10/640,118, was filed | Aug 13, 2023 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +749 days, USPTO patent term adjustment record | Aug 31, 2025 | 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 RE41,919 issued Nov 9, 2010, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered Nov 9, 2010 | High confidence |
| Surrendered on reissue | The steps above, in order | Nov 9, 2010 | 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.