US3560388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic coating composition with three component epoxy binder
Assignee: Memorex Corp
•
Filing: 1969-07-22
•
Granted: 1971-02-02
•
Expires: 1989-07-22
Abstract
Abstract A FLUID, HEAT CURABLE MAGNETIC COATING COMPOSITION IN WHICH MAGNETIC PARTICLES ARE DISPERSED IN A THREE COMPONENT THERMOSETTING EPOXY BINDER. THE COATING ALSO CONTAINS VOLATILE SOLVENTS. THE EPOXY BINDER CONTAINS (1) A HIGH EQUIVALENT WEIGHT EPOXY WITH A MOLECULAR WEIGHT OF ABOUT 400-4,000 PER EPOXY GROUP, (2) A LOW EQUIVALENT WEIGHT EPOXY WITH AMOLECULAR WEIGHT OF ABOUT 130211 PER EPOXY GROUP. AND (3) AN AROMATIC POLYAMINE CURING AGENT HAVING AT LEAST TWO PRIMARY AMINE GROUPS PER MOLECULE.
Inventors
- 👤 Louis M Higashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:21
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |