Patent US4448591A successfully refreshed from Google Patents.
Patent US1658951A successfully refreshed from Google Patents.
US1658951A
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US
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Expansion valve
Assignee: STITT REFRIGERATION Co
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Filing: 1926-01-07
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Granted: 1928-02-14
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Expires: 1946-01-07
Abstract
No abstract record available.
Inventors
- 👤 Roscoe R Stitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:38
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/0616; G05D16/0619; F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/7823; Y10T137/7825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-02-13 | 1931-08-15 | 1932-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-13 | 1935-08-15 | 1936-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-13 | 1939-08-15 | 1940-02-14 | $7700.00 | Window Closed / Lapsed |