US2803192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control system
Assignee: General Telephone Laboratories Inc
•
Filing: 1953-03-09
•
Granted: 1957-08-20
•
Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Leonard F Crabtree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:38
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/54; H02P1/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1750161A
Cited
US2158887A
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US2244880A
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US2458683A
Cited
US2486256A
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US2526646A
Cited
US2741986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |