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US2908480A
Expired / Lapsed
US
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Pressure relieved valve seal
Assignee: Chiksan Co
•
Filing: 1955-01-31
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Granted: 1959-10-13
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Leland S Hamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:14
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/12; Y; Y10; Y10S; Y10S277/00; Y10S277/928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB349813A
Cited
FR976026A
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US2389824A
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US2401377A
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US2474132A
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US2587091A
Cited
US2701117A
Cited
US2655936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |