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Patent US2055133A successfully refreshed from Google Patents.
US2055133A
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Valve
Assignee: Robertshaw Thermostat Co
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Filing: 1930-09-19
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Granted: 1936-09-22
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Expires: 1950-09-19
Abstract
No abstract record available.
Inventors
- 👤 Robert E Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:52
CPC Classifications
F; F23; F23L; F23L15/00; F23L15/02; F24; F24D; F24D5/00; Y; Y02; Y02E; Y02E20/00; Y02E20/34; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/86936
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) | 1939-09-22 | 1940-03-23 | 1940-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-09-22 | 1944-03-23 | 1944-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-09-22 | 1948-03-23 | 1948-09-22 | $7700.00 | Window Closed / Lapsed |