Patent US2016824A successfully refreshed from Google Patents.
US2016824A
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US
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Control system and relay device therefor
Assignee: JOHN M HOPWOOD
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Filing: 1933-03-28
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Granted: 1935-10-08
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Expires: 1953-03-28
Abstract
No abstract record available.
Inventors
- 👤 George W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:56
CPC Classifications
G; G05; G05B; G05B6/00; G05B6/05; Y; Y10; Y10S; Y10S236/00; Y10S236/01; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/7722; Y10T137/7758; Y10T137/7759
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) | 1938-10-07 | 1939-04-08 | 1939-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-10-07 | 1943-04-08 | 1943-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-10-07 | 1947-04-08 | 1947-10-08 | $7700.00 | Window Closed / Lapsed |