US2962641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Null-balance bridge servosystem
Assignee: Robertshaw Controls Co
•
Filing: 1956-05-21
•
Granted: 1960-11-29
•
Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Maltby
- 👤 Joseph W Philippi
- 👤 Edward N Cozzette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:20
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/263; G01F23/266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1975226A
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US2269374A
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US2436807A
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US2338732A
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US2457165A
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US2476496A
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US2530619A
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US2501583A
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US2476849A
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US2632872A
Cited
US2657352A
Cited
US2750556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |