US2773172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting unit
Assignee: Westinghouse Electric Corp
•
Filing: 1951-08-25
•
Granted: 1956-12-04
•
Expires: 1971-08-25
Abstract
No abstract record available.
Inventors
- 👤 Willis A Pennow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:10
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20; F; F21; F21V; F21V5/00; F21V5/04; F21V5/045; F21W; F21W2111/00; F21W2111/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191308585A
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US1635372A
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US1834041A
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US2021611A
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US1941079A
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US2133378A
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US2170912A
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GB492626A
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US2332362A
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US2375311A
Cited
US2486754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |