Patent US2492837A successfully refreshed from Google Patents.
US2492837A
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Portable signal light
Assignee: EMARCO Corp
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Filing: 1947-03-13
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Granted: 1949-12-27
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Expires: 1967-03-13
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:51
CPC Classifications
F; F21; F21S; F21S9/00; F21S9/02; F21S9/022; F21V; F21V15/00; F21V15/02; F21V21/00; F21V21/40; F21V23/00; F21V23/04; F21V5/00; F21V5/02; H; H01; H01H; H01H35/00; H01H35/02; F21V15/04; F21W; F21W2111/00; F21Y; F21Y2103/00; F21Y2103/30; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |