US2443816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge valve
Assignee: American Machine and Metals Inc
•
Filing: 1943-10-23
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Granted: 1948-06-22
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Expires: 1963-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Archibald H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:30
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1266; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/86493; Y10T137/877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US122544A
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US806330A
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US1541987A
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US1636769A
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FR818902A
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US2208662A
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US2241294A
Cited
US2310516A
Cited
US2250974A
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US2305724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |