US2550233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flashlight, fuse, and circuit tester
Assignee: Individual
•
Filing: 1947-12-11
•
Granted: 1951-04-24
•
Expires: 1967-12-11
Abstract
No abstract record available.
Inventors
- 👤 James J Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:59
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/54; G01R31/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1637472A
Cited
US1845764A
Cited
US2001382A
Cited
US2128810A
Cited
US2156319A
Cited
US2275696A
Cited
US2324661A
Cited
US2401366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |