Patent US2962641A successfully refreshed from Google Patents.
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 23:49
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/263; G01F23/266
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2365706A
Cited
US1975226A
Cited
US2269374A
Cited
US2436807A
Cited
US2338732A
Cited
US2457165A
Cited
US2476496A
Cited
US2530619A
Cited
US2501583A
Cited
US2476849A
Cited
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 |