Patent US5366459A successfully refreshed from Google Patents.
US2425863A
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Light projection apparatus
Assignee: General Electric Co
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Filing: 1945-05-18
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Granted: 1947-08-19
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Expires: 1965-05-18
Abstract
No abstract record available.
Inventors
- 👤 Frank E Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:47
CPC Classifications
G; G02; G02B; G02B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1020371A
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US1496427A
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US1720011A
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US1573314A
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FR826102A
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US2203658A
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US2243084A
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US2194384A
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US2361667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |