Patent US2670457A successfully refreshed from Google Patents.
US2670457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector for ferrous metal
Assignee: Remington Arms Co LLC
•
Filing: 1952-01-23
•
Granted: 1954-02-23
•
Expires: 1972-01-23
Abstract
No abstract record available.
Inventors
- 👤 Robert B Hartman
- 👤 William H Aitken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:44
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1778653A
Cited
US1976636A
Cited
US1971189A
Cited
US2346773A
Cited
GB575150A
Cited
US2543570A
Cited
US2487047A
Cited
US2579404A
Cited
US2600857A
Cited
US2585974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |