US1538992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash light and recharging device for the battery thereof
Assignee: National Carbon Co Inc
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Filing: 1920-12-20
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Granted: 1925-05-26
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Expires: 1940-12-20
Abstract
No abstract record available.
Inventors
- 👤 Hopkins Nevil Monroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:17
CPC Classifications
F; F21; F21V; F21V25/00; F21V25/02; F21V25/04; A; A61; A61M; A61M31/00; F21L; F21L13/00; F21L4/00; F21L4/08; F21L4/085; F21V23/00; F21V23/04; F21V23/0414; F21V31/00; F21V31/03
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) | 1928-05-25 | 1928-11-24 | 1929-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-05-25 | 1932-11-24 | 1933-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-05-25 | 1936-11-24 | 1937-05-26 | $7700.00 | Window Closed / Lapsed |