Patent US2431091A successfully refreshed from Google Patents.
US2431091A
Expired / Lapsed
US
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Multicolored electric flashlight
Assignee: Individual
•
Filing: 1945-06-25
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Granted: 1947-11-18
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Expires: 1965-06-25
Abstract
No abstract record available.
Inventors
- 👤 Robert B Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:51
CPC Classifications
F; F21; F21L; F21L4/00; F21L4/02; F21V; F21V9/00; F21V9/08; F21V9/083; G; G09; G09F; G09F21/00; G09F21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1661785A
Cited
US1448353A
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US1613203A
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US2092664A
Cited
US2242981A
Cited
US2340530A
Cited
US2362131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |