Patent US2435731A successfully refreshed from Google Patents.
US2435731A
Expired / Lapsed
US
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Expansion valve
Assignee: Air Products Inc
•
Filing: 1943-10-21
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Granted: 1948-02-10
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Expires: 1963-10-21
Abstract
No abstract record available.
Inventors
- 👤 Carl R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:36
CPC Classifications
F; F16; F16K; F16K49/00; F16B; F16B2200/00; F16B2200/50; F16B2200/506; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T403/00; Y10T403/53; Y10T403/535
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1875511A
Cited
US1828478A
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US1619335A
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US1727693A
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US1987948A
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US2153819A
Cited
US2259280A
Cited
US2209216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |