US2520446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic mixing valve
Assignee: H A Thrush & Co
•
Filing: 1946-08-16
•
Granted: 1950-08-29
•
Expires: 1966-08-16
Abstract
No abstract record available.
Inventors
- 👤 Homer A Thrush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:27
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D19/1066; F24D3/00; F24D3/08; G; G05; G05D; G05D23/00; G05D23/01; G05D23/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US854450A
Cited
US1145476A
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US1137921A
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US1934499A
Cited
FR773505A
Cited
US2216346A
Cited
US2262194A
Cited
GB522577A
Cited
US2326096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |