Patent US1880981A successfully refreshed from Google Patents.
US3474809A
Expired / Lapsed
US
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Normally-closed explosive-operated valve
Assignee: PYRONETICS Inc
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Filing: 1965-12-27
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Granted: 1969-10-28
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Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 William Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:08
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K13/00; F16K13/04; F16K13/06; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1782
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |