Patent US2947876A successfully refreshed from Google Patents.
US2947876A
Expired / Lapsed
US
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Pinhole detecting unit
Assignee: General Electric Co
•
Filing: 1955-12-30
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Granted: 1960-08-02
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 John J Larew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:47
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/892; G01N21/894
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1897219A
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US2229638A
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US2229451A
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US2193590A
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US2371963A
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US2444442A
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US2563274A
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US2627064A
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US2753464A
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US2758712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |