Patent US2540583A successfully refreshed from Google Patents.
US2540583A
Expired / Lapsed
US
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Relief valve
Assignee: NAT ALUMINUM Manufacturing CO
•
Filing: 1944-03-10
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Granted: 1951-02-06
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Expires: 1964-03-10
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Ives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:00
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/08; A47J27/09; A47J27/092; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7921; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1322324A
Cited
US1326124A
Cited
US1820120A
Cited
US367324A
Cited
US858131A
Cited
US1515184A
Cited
US1369754A
Cited
US1569187A
Cited
GB229837A
Cited
US1586273A
Cited
US1871984A
Cited
US1834837A
Cited
US1974274A
Cited
US1958429A
Cited
US2200903A
Cited
US2166003A
Cited
US2164450A
Cited
US2254570A
Cited
US2308320A
Cited
US2340593A
Cited
US2297378A
Cited
US2428483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |