US2906846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device
Assignee: Robertshaw Controls Co
•
Filing: 1957-02-28
•
Granted: 1959-09-29
•
Expires: 1977-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Jack Witherspoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:22
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0225; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/27537
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1886439A
Cited
US2257477A
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US2428525A
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US2475291A
Cited
US2611850A
Cited
US2775047A
Cited
US2743532A
Cited
US2715673A
Cited
US2715672A
Cited
US2767293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |