US2586972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism operated by a plurality of thermostats
Assignee: Robertshaw Controls Co
•
Filing: 1948-08-16
•
Granted: 1952-02-26
•
Expires: 1968-08-16
Abstract
No abstract record available.
Inventors
- 👤 Neville P Mckenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:28
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/121; G05D23/122; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1920505A
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US2040109A
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US2063613A
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US2073838A
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US2416453A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |