US2509832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric flashlight with means for quickly changing bulbs
Assignee: Individual
•
Filing: 1948-03-09
•
Granted: 1950-05-30
•
Expires: 1968-03-09
Abstract
No abstract record available.
Inventors
- 👤 Frank E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:09
CPC Classifications
F; F21; F21L; F21L4/00; F21V; F21V19/00; F21V19/04; F21V19/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR515599A
Cited
US1447378A
Cited
US1594485A
Cited
US1647011A
Cited
US2231382A
Cited
US2221126A
Cited
US2329063A
Cited
US2408643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |