Patent record
US4334270
Securities valuation system
| Assignee | — |
|---|---|
| Filed | 1972-08-11 |
| Granted | 1982-06-08 |
| Status | expired term |
| Est. term end | 1999-06-08 |
| Fee lapse date | — |
| CPC codes | G06Q40/06 |
Dates on the curated countdown pages are USPTO-adjusted expiration dates (verified against USPTO/Google Patents legal-status data as of July 2026, including patent-term adjustment); they still assume maintenance fees keep being paid, and are not a legal determination. Dates in the searchable database are raw patent-term math (20 years from filing, or the older 17-from-grant rule) that ignores adjustments, extensions, and terminal disclaimers. This is not legal advice.