Patent US3330693A successfully refreshed from Google Patents.
US3330693A
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Method of making a magnetic record member with encapsulated ferromagnetic particles in a binder and resulting product
Assignee: Pateco
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Filing: 1962-10-29
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Granted: 1967-07-11
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 George G Rumberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:56
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; G11B5/70647; G11B5/702; G11B5/7023; G11B5/712; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF MAKING A MAGNETIC IMPULSE RECORD MEMBER WHICH COMPRISES PROVIDING FERROMAGNETIC PARTICLES, GRINDING SAID FERROMAGNETIC PARTICLES UNDER AQUEOUS CONDITIONS TO REDUCE THE SIZE OF SAID PARTICLES, ADDING A POLYMERIZABLE VINYL MONOMER TO THE SLURRY OF GROUND FERROMAGNETIC PARTICLES AND WATER FOR ENCAPSULATING EACH OF THE PARTICLES, ADDING A CATALYST TO SAID SLURRY, AGITATING UNDER POLYMERIZATION CONDITION TO FORM FERROMAGNETIC PARTICLES INDIVIDUALLY ENCAPSULATED WITHIN A POLYMER SHELL, SEPARATING THE ENCAPSULATED FERROMAGNETIC PARTICLES THUS FORMED FROM THE WATER SUSPENSION, SUSPENDING SAID ENCAPSULATED PARTICLES IN A NON-MAGNETIZABLE BINDER, APPLYING SAID BINDER CONTAINING THE ENCAPSULATED PARTICLES TO A NON-MAGNETIC BACKING, AND ADHERINGLY SETTING SAID BINDER ON SAID BACKING.
Claim 2
Independent Claim
106 words
A METHOD OF MAKING A MAGNETIC IMPULSE RECORD MEMBER WHICH COMPRISES PROVIDING FERROMAGNETIC PARTICLES, GRINDING SAID FERROMAGNETIC PARTICLES UNDER AQUEOUS CONDITIONS TO REDUCE THE SIZE OF SAID PARTICLES, ADDING A POLYMERIZABLE VINYL MONOMER TO THE SLURRY OF GROUND FERROMAGNETIC PARTICLES AND WATER FOR ENCAPSULATING EACH OF THE PARTICLES, ADDING A CATALYST TO SAID SLURRY, AGITATING UNDER POLYMERIZATION CONDITION TO FORM FERROMAGNETIC PARTICLES INDIVIDUALLY ENCAPSULATED WITHIN A POLYMER SHELL, SEPARATING THE ENCAPSULATED FERROMAGNETIC PARTICLES THUS FORMED FROM THE WATER SUSPENSION, SUSPENDING SAID ENCAPSULATED PARTICLES IN A NON-MAGNETIZABLE BINDER, APPLYING SAID BINDER CONTAINING THE ENCAPSULATED PARTICLES TO A NON-MAGNETIC BACKING, AND ADHERINGLY SETTING SAID BINDER ON SAID BACKING.
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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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |