US3054422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid seal for pressure responsive valve
Assignee: Individual
•
Filing: 1958-09-26
•
Granted: 1962-09-18
•
Expires: 1978-09-26
Abstract
No abstract record available.
Inventors
- 👤 Pellegrino E Napolitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:17
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K1/385; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7835; Y10T137/7837; Y10T137/7866; Y10T137/7867
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899973A
Cited
US1514233A
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AU1215528A
Cited
US2163472A
Cited
US2170588A
Cited
US2330881A
Cited
US2567391A
Cited
GB759178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |