US3247017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording tape for sound, image and pulse recording
Assignee: Agfa Gevaert NV
•
Filing: 1961-12-27
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Granted: 1966-04-19
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Eichler Wolfgang
- 👤 Abeck Wilhelm
- 👤 Josten Wolfgang
- 👤 Krones Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7021; G11B5/7022; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31573; Y10T428/3158; Y10T428/31609; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A MAGNETIC RECORDING TAPE COMPRISING (A) A SUPPORTING LAYER FORMED OF A HIGHLY POLYMERIC ORGANIC MATERIAL HAVING COATED THEREON (B) AT LEAST ONE MAGNETIZABLE LAYER FORMED OF AN ORGANIC NONMAGNETIC FILM-FORMING BINDING AGENT THROUGHOUT WHICH FERROMAGNETIC PARTICLES ARE DISPERSED IN AN AMOUNT BETWEEN 30 AND 50 PERCENT BY VOLUME BASED ON THE TOTAL VOLUME OF MAGNETIZABLE LAYER, THE SAID BINDING AGENT CONSISTING ESSENTIALLY OF A MIXTURE OF (I) BETWEEN 75-95% OF A POLYURETHANE RESIN PRODUCED BY REACTION OF A POLYESTE CONTAINING FREE HYDROXYL RADICALS WITH A POLYISOCYNATE, AND (II) BETWEEN 5-25% OF A THERMOPLASTIC NON-CROSSLINKED POLYMERIC RESIN SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF VINYL CHLORIDE AND VINYL ACETATE, AND POLYVINYL ISOBUTYL ETHERS.
Claim 2
Dependent Claim
114 words
A MAGNETIC RECORDING TAPE COMPRISING (A) A SUPPORTING LAYER FORMED OF A HIGHLY POLYMERIC ORGANIC MATERIAL HAVING COATED THEREON (B) AT LEAST ONE MAGNETIZABLE LAYER FORMED OF AN ORGANIC NONMAGNETIC FILM-FORMING BINDING AGENT THROUGHOUT WHICH FERROMAGNETIC PARTICLES ARE DISPERSED IN AN AMOUNT BETWEEN 30 AND 50 PERCENT BY VOLUME BASED ON THE TOTAL VOLUME OF MAGNETIZABLE LAYER, THE SAID BINDING AGENT CONSISTING ESSENTIALLY OF A MIXTURE OF (I) BETWEEN 75-95% OF A POLYURETHANE RESIN PRODUCED BY REACTION OF A POLYESTE CONTAINING FREE HYDROXYL RADICALS WITH A POLYISOCYNATE, AND (II) BETWEEN 5-25% OF A THERMOPLASTIC NON-CROSSLINKED POLYMERIC RESIN SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF VINYL CHLORIDE AND VINYL ACETATE, AND POLYVINYL ISOBUTYL ETHERS.
References Cited (Backward Citations)
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Cited
US2948707A
Cited
US2989415A
Cited
US3001891A
Cited
US3049442A
Cited
US3149995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |