Patent US3655595A successfully refreshed from Google Patents.
US3655595A
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US
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Epoxy binder for magnetic coating composition
Assignee: Memorex Corp
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Filing: 1969-02-20
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Granted: 1972-04-11
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Expires: 1989-02-20
Abstract
Abstract A FLUID, THERMOSETTING MAGNETIC COATING COMPOSITION COMPRISING MAGNETIC PARTICLES AND A FILM-FORMING COMPOSITION OR BINDER STABLE AT ROOM TEMPERATURES. THE BINDER OR FILM-FORMING COMPOSITION COMPRISES AN ADDUCT BASED UPON DIMER ACID AND THE DIGLYCIDLY ETHER OF BISPHENOL A WITH TERMINAL OXIRANE RINGS, AND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 800 TO ABOUT 5000 AND AN EPOXIDE EQUIVALENT WEIGHT OF FROM ABOUT 400 TO ABOUT 2600 AND ADAPTED TO FORM A FLEXIBLE FILM UPON HARDENING, A FATTY ACID POLYAMIDE, AND A CURING AGENT COMPRISING AN AMINE AND A LEWIS ACID-ALKYL AMINE COMPLEX SALT.
Inventors
- 👤 Louis M Higashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:16
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7023; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31765; Y10T428/31768
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |