Patent US3864021A successfully refreshed from Google Patents.
US2365587A
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US
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Lighting apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1939-12-13
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Granted: 1944-12-19
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Expires: 1959-12-13
Abstract
No abstract record available.
Inventors
- 👤 Willis A Pennow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:55
CPC Classifications
B; B63; B63B; B63B22/00; B63B22/16; B63B22/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-12-19 | 1948-06-19 | 1948-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-12-19 | 1952-06-19 | 1952-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-12-19 | 1956-06-19 | 1956-12-19 | $7700.00 | Window Closed / Lapsed |