Patent US3725285A successfully refreshed from Google Patents.
US3725285A
Expired / Lapsed
US
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Magnetic coating compositions
Assignee: International Business Machines Corp
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Filing: 1970-06-24
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Granted: 1973-04-03
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Expires: 1990-06-24
Abstract
Abstract MAGNETIC COATING COMPOSITIONS COMPRISING MAGNETIC OXIDE PIGMENT AND A BINDER SELECTED FROM CERTAIN WATERBASED ACRYLIC RESIN EMULSIONS. THE COMPOSITIONS OF THIS INVENTION ARE PARTICULARLY SUITABLE FOR IMPARTING MAGNETIC DATA FIELDS TO PAPER, CARD STOCK, FILM, OR OTHER SUBSTRATES. THEY ARE PARTICULARLY SUITABLE FOR APPLICATION TO MAGNETIC TAPES TO BE SUBJECTED TO HIGH TRANSPORT SPEEDS PAST MAGNETIC TAPE HEADS WITH WHICH INTIMATE CONTACT MUST BE MAINTAINED.
Inventors
- 👤 H Denk
- 👤 J Sabad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:21
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7023
Claims Analysis
Total Claims: 0
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |