US2597073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flashlight having a reversible contact plate for establishing either series or series-parallel connections
Assignee: Individual
•
Filing: 1947-09-12
•
Granted: 1952-05-20
•
Expires: 1967-09-12
Abstract
No abstract record available.
Inventors
- 👤 James L Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:32
CPC Classifications
F; F21; F21L; F21L4/00; F21L4/005; F21V; F21V19/00; F21V19/04; F21V23/00; F21V23/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1892075A
Cited
US1932102A
Cited
US2074536A
Cited
US2123435A
Cited
US2224742A
Cited
US2245793A
Cited
US2145631A
Cited
US2408643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |