Patent US2903690A successfully refreshed from Google Patents.
US2903690A
Expired / Lapsed
US
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Photocell probe target selector
Assignee: Individual
•
Filing: 1954-12-16
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Granted: 1959-09-08
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Expires: 1974-12-16
Abstract
No abstract record available.
Inventors
- 👤 Frederick F Slack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:26
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2557949A
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US2668286A
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US2527753A
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US2532338A
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US2595141A
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US2636166A
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US2614226A
Cited
US2855589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |