US2587158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal detector
Assignee: RCA Corp
•
Filing: 1948-02-27
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Granted: 1952-02-26
•
Expires: 1968-02-27
Abstract
No abstract record available.
Inventors
- 👤 Alf H Hofberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:48
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/344; G; G01; G01V; G01V3/00; G01V3/08; G01V3/10; G01V3/104; B07C2501/00; B07C2501/0036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |