Patent US2964685A successfully refreshed from Google Patents.
US2964685A
Expired / Lapsed
US
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Photoelectric relay devices
Assignee: R Hoe and Co Inc
•
Filing: 1957-10-23
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Granted: 1960-12-13
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Expires: 1977-10-23
Abstract
No abstract record available.
Inventors
- 👤 Francis A Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:11
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1721216A
Cited
US2065758A
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US2278920A
Cited
US2353218A
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US2420058A
Cited
US2562176A
Cited
US2721297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |