Patent US2405286A successfully refreshed from Google Patents.
Patent US2809281A successfully refreshed from Google Patents.
US2809281A
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Surgical lighting system for television and other cameras
Assignee: Wilmot Castle Co
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Filing: 1955-01-21
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Granted: 1957-10-08
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Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Greppin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:39
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/14; G; G03; G03B; G03B15/00; G03B15/02; F21W; F21W2131/00; F21W2131/20; F21W2131/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US837084A
Cited
US1514069A
Cited
FR608016A
Cited
US2114664A
Cited
US2551753A
Cited
US2675462A
Cited
US2758196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |