US2737598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric relay device
Assignee: AT&T Inc
•
Filing: 1950-10-27
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Granted: 1956-03-06
•
Expires: 1970-10-27
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Lewis
- 👤 Karl H Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:51
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1546264A
Cited
US2049647A
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US2207097A
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US2374287A
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US2420716A
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US2512247A
Cited
US2565716A
Cited
US2636128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |