US2448429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief valve
Assignee: Individual
•
Filing: 1945-10-29
•
Granted: 1948-08-31
•
Expires: 1965-10-29
Abstract
No abstract record available.
Inventors
- 👤 Guy J Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:59
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1752; Y10T137/7722; Y10T137/7738; Y10T137/774; Y10T137/7781; Y10T137/7835; Y10T137/7836; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1290030A
Cited
US633421A
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US1210913A
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US2179165A
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US2239169A
Cited
US2272318A
Cited
US2343901A
Cited
US2397269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |