US3490032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus utilizing a pair of spaced magnetometers for making magnetic surveys
Assignee: Gulf Research and Development Co
•
Filing: 1966-12-08
•
Granted: 1970-01-13
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Expires: 1986-12-08
Abstract
No abstract record available.
Inventors
- 👤 Ernst G Zurflueh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15; G01V3/165; G01R; G01R33/00; G01R33/02; G01R33/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123766A
Cited
US2535068A
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US2966853A
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US3020470A
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US2696602A
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US2856579A
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US3015060A
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US2891216A
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US3052837A
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US3023359A
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US3188560A
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US3042857A
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US3274488A
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US3263161A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |