Patent US2151570A successfully refreshed from Google Patents.
US2151570A
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US
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Control system
Assignee: General Electric Co
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Filing: 1936-02-27
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Granted: 1939-03-21
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Expires: 1956-02-27
Abstract
No abstract record available.
Inventors
- 👤 David R Shoults
- 👤 Harold W Lord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:53
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/08; B41F13/10; B41F13/12; B41F13/14; B41F13/02; B41F13/025; Y; Y10; Y10T; Y10T83/00; Y10T83/141; Y10T83/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-03-20 | 1942-09-19 | 1943-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-20 | 1946-09-19 | 1947-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-20 | 1950-09-19 | 1951-03-21 | $7700.00 | Window Closed / Lapsed |