Patent US2901174A successfully refreshed from Google Patents.
US2901174A
Expired / Lapsed
US
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Thermostatically controlled mixing valves
Assignee: Robertshaw Controls Co
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Filing: 1957-06-06
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Granted: 1959-08-25
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Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Charles D Branson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:17
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1393
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1000435A
Cited
GB234563A
Cited
CH209415A
Cited
US2419630A
Cited
US2524142A
Cited
US2509656A
Cited
US2620134A
Cited
US2778598A
Cited
US2830765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |