US2936991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaire hanger
Assignee: Westinghouse Electric Corp
•
Filing: 1954-12-15
•
Granted: 1960-05-17
•
Expires: 1974-12-15
Abstract
No abstract record available.
Inventors
- 👤 George J Picha
- 👤 Frederic C Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:03
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US393400A
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US849132A
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US910765A
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US948902A
Cited
US2297869A
Cited
US2421447A
Cited
US2562406A
Cited
US2459034A
Cited
US2628796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |