Patent US2638979A successfully refreshed from Google Patents.
US2638979A
Expired / Lapsed
US
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Control device
Assignee: Individual
•
Filing: 1948-08-02
•
Granted: 1953-05-19
•
Expires: 1968-08-02
Abstract
No abstract record available.
Inventors
- 👤 John L Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:31
CPC Classifications
G; G04; G04F; G04F3/00; G04F3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2050614A
Cited
US2106042A
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US2053143A
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US2254795A
Cited
US2230191A
Cited
US2459876A
Cited
US2500476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |