US3262813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording medium coated with a binder copolymer of butadiene, acrylonitrile, and a hydroxy methacrylate
Assignee: Ampex Corp
•
Filing: 1963-11-19
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Granted: 1966-07-26
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Dervin L Flowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:06
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7023; C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F236/00; C08F236/02; C08F236/04; C08F236/06; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31924; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A MAGNETIC RECORDING MEDIUM INCLUDING A SUPPORT AND A COATING ON SAID SUPPORT, SAID COATING CONSISTING OF FINELY DIVIDED MAGNETIC PARTICLES DISPERSED IN AN ORGANIC BINDER, SAID ORGANIC BINDER COMPRISING A COPOLYMERIZED MIXTURE OF ACRYLONITRILE, BUTADIENE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2-HYDROXY ETHYL METHACRYLATE AND 2-HYDROXY PROPYL METHACRYLATE.
Claim 2
Dependent Claim
52 words
A MAGNETIC RECORDING MEDIUM INCLUDING A SUPPORT AND A COATING ON SAID SUPPORT, SAID COATING CONSISTING OF FINELY DIVIDED MAGNETIC PARTICLES DISPERSED IN AN ORGANIC BINDER, SAID ORGANIC BINDER COMPRISING A COPOLYMERIZED MIXTURE OF ACRYLONITRILE, BUTADIENE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2-HYDROXY ETHYL METHACRYLATE AND 2-HYDROXY PROPYL METHACRYLATE.
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US2628929A
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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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |