US2707481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Individual
•
Filing: 1951-09-28
•
Granted: 1955-05-03
•
Expires: 1971-09-28
Abstract
No abstract record available.
Inventors
- 👤 Mcpherson Hal Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/06; F16K7/00; F16K7/12; F16K7/14; F16K7/16; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/6851; Y10T137/7043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE403549C
Cited
US1803957A
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US1836976A
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US1771410A
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US1807277A
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US1855991A
Cited
US1988026A
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US1976851A
Cited
US2054909A
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US2208181A
Cited
US2550672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |