Patent US2560281A successfully refreshed from Google Patents.
US2560281A
Expired / Lapsed
US
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Luminaire with glare shielding means for producing an optimum distribution of light on a work surface
Assignee: SIGHT LIGHT Corp
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Filing: 1945-11-29
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Granted: 1951-07-10
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Expires: 1965-11-29
Abstract
No abstract record available.
Inventors
- 👤 Leroy C Doane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:25
CPC Classifications
F; F21; F21V; F21V13/00; F21V13/02; F21V13/10; F21S; F21S6/00; F21S6/002; F21S6/003; F21V11/00; F21V11/02; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1197383A
Cited
US1563884A
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US2065164A
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US2033235A
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US2270680A
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US2305721A
Cited
US2345235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |