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Patent US2646487A successfully refreshed from Google Patents.
US2646487A
Expired / Lapsed
US
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Control device
Assignee: Individual
•
Filing: 1949-02-01
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Granted: 1953-07-21
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Expires: 1969-02-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick O Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/54; B23Q5/58; G; G05; G05G; G05G15/00; G05G15/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/1896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |