Patent US2539974A successfully refreshed from Google Patents.
US2539974A
Expired / Lapsed
US
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Flashlight with adjustable head
Assignee: GORDON J TURNER
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Filing: 1947-03-03
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Granted: 1951-01-30
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Expires: 1967-03-03
Abstract
No abstract record available.
Inventors
- 👤 Leo H Riddell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:02
CPC Classifications
F; F21; F21L; F21L4/00; F21L4/04; F21L4/045; F21V; F21V23/00; F21V23/04; F21V23/0414
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US669546A
Cited
US1392163A
Cited
US1532493A
Cited
GB248030A
Cited
US2099167A
Cited
US2164529A
Cited
US2401366A
Cited
US2299148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |