US3519919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency stabilizing element for metal detectors
Assignee: Individual
•
Filing: 1968-12-11
•
Granted: 1970-07-07
•
Expires: 1988-12-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin Rance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:03
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1073614B
Cited
US1320980A
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US1651922A
Cited
US1850580A
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US2288735A
Cited
US2417785A
Cited
US2442805A
Cited
US2786984A
Cited
US3181057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |