Patent US2587956A successfully refreshed from Google Patents.
US2587956A
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US
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Light projecting apparatus
Assignee: FISH SCHURMAN CORP
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Filing: 1948-05-28
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Granted: 1952-03-04
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Expires: 1968-05-28
Abstract
No abstract record available.
Inventors
- 👤 Bastien Roy Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G02B21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1426722A
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US1932817A
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US1891348A
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US2138665A
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US2289575A
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US2351736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |