Patent US3100350A successfully refreshed from Google Patents.
US3100350A
Expired / Lapsed
US
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Magnetic direction and inclination indicating device
Assignee: Individual
•
Filing: 1960-07-18
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Granted: 1963-08-13
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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 22:40
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)
US216759A
Cited
US994901A
Cited
US1877593A
Cited
US2192148A
Cited
US2098476A
Cited
US2313168A
Cited
US2746162A
Cited
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 |