US2706764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuits
Assignee: AT&T Inc
•
Filing: 1952-03-20
•
Granted: 1955-04-19
•
Expires: 1972-03-20
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:51
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/22; G05D23/2236; G05D23/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US915974A
Cited
US1582702A
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US1730254A
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US1910381A
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US2086120A
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US2216595A
Cited
US2266569A
Cited
US2429827A
Cited
US2568411A
Cited
US2608635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |