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Patent US2535819A successfully refreshed from Google Patents.
US2535819A
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US
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Electric safety lamp
Assignee: Thomas A Edison Inc
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Filing: 1945-12-13
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Granted: 1950-12-26
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Expires: 1965-12-13
Abstract
No abstract record available.
Inventors
- 👤 Willson Y Stamper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:21
CPC Classifications
F; F21; F21L; F21L4/00; F21V; F21V25/00; F21V25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1453281A
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US1806868A
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US2312613A
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US1186454A
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US1345212A
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US1514637A
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US1586795A
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US1965664A
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US2250644A
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US2204752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |