Patent US3549121A successfully refreshed from Google Patents.
US3549121A
Expired / Lapsed
US
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Valve
Assignee: EXOL Inc A CORP OF DE
•
Filing: 1968-06-04
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Granted: 1970-12-22
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Expires: 1988-06-04
Abstract
No abstract record available.
Inventors
- 👤 Jacques H Mercier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:42
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/30; F16K1/301; F16K1/303; F16K1/32; F16K1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |