Patent US2581129A successfully refreshed from Google Patents.
US2581129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electric flashlight with retractable mount for auxiliary lamps
Assignee: Individual
•
Filing: 1947-06-14
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Granted: 1952-01-01
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Expires: 1967-06-14
Abstract
No abstract record available.
Inventors
- 👤 Muldoon Bernard Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:06
CPC Classifications
F; F21; F21V; F21V19/00; F21V19/02; F21L; F21L2/00; F21L4/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR438549A
Cited
US1232824A
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FR740483A
Cited
DE675426C
Cited
US2161872A
Cited
US2228009A
Cited
US2337237A
Cited
US2329556A
Cited
US2427051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |