US3030571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for detecting magnetic field gradients
Assignee: Lockheed Martin Corp
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Filing: 1957-01-08
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Granted: 1962-04-17
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Expires: 1977-01-08
Abstract
No abstract record available.
Inventors
- 👤 Dessler Alexander Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:33
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/24; G01R33/02; G01R33/022; G01V; G01V3/00; G01V3/15; G01V3/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23769E
Cited
US2423103A
Cited
US2589494A
Cited
GB727129A
Cited
US2720625A
Cited
US2929018A
Cited
US2856579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |