US3281669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for indicating and visibly permanently recording a magnetic field utilizing a magnetostrictive material and a chemical reaction
Assignee: Individual
•
Filing: 1963-04-02
•
Granted: 1966-10-25
•
Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Lyne S Trimble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:12
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS OF OBTAINING A VISIBLE IMAGE OF A MAGNETIC FIELD, WHICH COMPRISES THE STEPS OF: CONFINING A MAGNETOSTRICTIVE SUBSTANCE WITHIN A BRITTLE SHELL OF RELATIVELY INERT MATERIAL CAPABLE OF BEING RUPTURED BY THE CHANGE IN SAID SUBSTANCE UNDER THE INFLUENCES OF A MAGNETIC FIELD; SURROUNDING THE SHELL WITH A CHEMICAL ENVIRONMENT CAPABLE OF REACTING WITH SAID SUBSTANCE; AND THEREAFTER RUPTURING THE SHELL BY SUBJECTING THE SUBSTANCE TO A MAGNETIC FIELD SO AS TO PERMIT A CHEMICAL REACTION BETWEEN THE EXPOSED MAGNETOSTRICTIVE SUBSTANCE AND THE CHEMICAL ENVIRONMENT.
Claim 2
Dependent Claim
87 words
THE PROCESS OF OBTAINING A VISIBLE IMAGE OF A MAGNETIC FIELD, WHICH COMPRISES THE STEPS OF: CONFINING A MAGNETOSTRICTIVE SUBSTANCE WITHIN A BRITTLE SHELL OF RELATIVELY INERT MATERIAL CAPABLE OF BEING RUPTURED BY THE CHANGE IN SAID SUBSTANCE UNDER THE INFLUENCES OF A MAGNETIC FIELD; SURROUNDING THE SHELL WITH A CHEMICAL ENVIRONMENT CAPABLE OF REACTING WITH SAID SUBSTANCE; AND THEREAFTER RUPTURING THE SHELL BY SUBJECTING THE SUBSTANCE TO A MAGNETIC FIELD SO AS TO PERMIT A CHEMICAL REACTION BETWEEN THE EXPOSED MAGNETOSTRICTIVE SUBSTANCE AND THE CHEMICAL ENVIRONMENT.
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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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |