US3100350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic direction and inclination indicating device
Assignee: Individual
•
Filing: 1960-07-18
•
Granted: 1963-08-13
•
Expires: 1980-07-18
Abstract
No abstract record available.
Inventors
- 👤 Clifford K Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:00
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/022; G; G01; G01C; G01C9/00; G01C9/10; G01C9/18; G01C9/24; G01C9/36; G01V; G01V3/00; G01V3/18; G01V3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A MAGNETIC INDICATING DEVICE COMPRISING A SPHERICAL SHELL OF TRANSPARENT MATERIAL HAVING A SMOOTH INTERIOR, A MAGNET FIXEDLY DISPOSED WITHIN SAID SHELL, GRAVITY RESPONSIVE MEANS ALSO WITHIN SAID SHELL AND FREELY MOVABLE RELATIVE TO SAID MAGNET, AND MEANS FOR BUOYINGLY SUPPORTING SAID SHELL IN A LIQUID MEDIUM SO THAT SAID SHELL CAN ORIENT ITSELF IN ACCORDANCE WITH THE FIELD FORCES TO WHICH SAID MAGNET IS SUBJECTED.
Claim 2
Dependent Claim
66 words
A MAGNETIC INDICATING DEVICE COMPRISING A SPHERICAL SHELL OF TRANSPARENT MATERIAL HAVING A SMOOTH INTERIOR, A MAGNET FIXEDLY DISPOSED WITHIN SAID SHELL, GRAVITY RESPONSIVE MEANS ALSO WITHIN SAID SHELL AND FREELY MOVABLE RELATIVE TO SAID MAGNET, AND MEANS FOR BUOYINGLY SUPPORTING SAID SHELL IN A LIQUID MEDIUM SO THAT SAID SHELL CAN ORIENT ITSELF IN ACCORDANCE WITH THE FIELD FORCES TO WHICH SAID MAGNET IS SUBJECTED.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |