Patent US3080319A successfully refreshed from Google Patents.
US3080319A
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Magnetic recording members and their preparation
Assignee: EIDP Inc
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Filing: 1959-10-22
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Granted: 1963-03-05
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Expires: 1979-10-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles H Arrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:15
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; G11B5/842; G11B5/845; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70636; Y; Y10; Y10S; Y10S264/00; Y10S264/58
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
A PROCESS FOR ORIENTING MAGNETICALLY ANISOTROPIC PARTICLES OF FERROMAGNETIC CHROMIUM OXIDE IN A RECORDING MEMBER WHICH COMPRISES THE STEP OF EXPOSING THE MEMBER TO A MAGNETIC FIELD WHILE THE BINDER IS IN A SUBSTANTIALLY FLUID CONDITION, WHEREUPON AT LEAST PARTIAL ALIGNMENT OF THE MAGNETIC PARTICLES IS EFFECTED, AND AFTER THE BINDER HAS BECOME SELF-SUPPORTING, ELONGATING THE MEMBER IN THE DIRECTION OF PARTICLE ALIGNMENT TO EFFECT FURTHER PARTICLE ALIGNMENT, WHEREIN SAID EXPOSING TO THE MAGNETIC FIELD AND SAID ELONGATION OF THE MEMBER ARE EACH SINGLY SUFFICIENT TO PRODUCE A REMANENCE RATIO OF AT LEAST 1.5.
Claim 2
Dependent Claim
94 words
A PROCESS FOR ORIENTING MAGNETICALLY ANISOTROPIC PARTICLES OF FERROMAGNETIC CHROMIUM OXIDE IN A RECORDING MEMBER WHICH COMPRISES THE STEP OF EXPOSING THE MEMBER TO A MAGNETIC FIELD WHILE THE BINDER IS IN A SUBSTANTIALLY FLUID CONDITION, WHEREUPON AT LEAST PARTIAL ALIGNMENT OF THE MAGNETIC PARTICLES IS EFFECTED, AND AFTER THE BINDER HAS BECOME SELF-SUPPORTING, ELONGATING THE MEMBER IN THE DIRECTION OF PARTICLE ALIGNMENT TO EFFECT FURTHER PARTICLE ALIGNMENT, WHEREIN SAID EXPOSING TO THE MAGNETIC FIELD AND SAID ELONGATION OF THE MEMBER ARE EACH SINGLY SUFFICIENT TO PRODUCE A REMANENCE RATIO OF AT LEAST 1.5.
Claim 3
Dependent Claim
30 words
THE PROCESS OF CLAIM 1 WHEREIN THE MAGNETIC PARTICLES, AFTER BEING MAGNETICALLY ALIGNED, ARE MECHANICALLY ORIENTED IN THE DIRECTION OF PARTICLE ALIGNMENT BY STRETCHING TO AT LEAST 2XTHE ORIGINAL DIMENSION.
References Cited (Backward Citations)
CA577428A
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US2694656A
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US2796359A
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US2849312A
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US2937028A
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US2900282A
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US2911317A
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US2975484A
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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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |