Patent US2587920A successfully refreshed from Google Patents.
US2587920A
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US
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Lighting fixture with detachable light control panel
Assignee: PITTSBURGH REFLECTOR Co
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Filing: 1949-01-08
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Granted: 1952-03-04
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Expires: 1969-01-08
Abstract
No abstract record available.
Inventors
- 👤 Walter W Stubbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:24
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/18; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2327230A
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US2028453A
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US2283782A
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US2327552A
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US2365614A
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US2431656A
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US2440603A
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US2490191A
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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 |