US3740289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making adhesive coated ferrite magnets
Assignee: Allen Bradley Co LLC
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Filing: 1971-02-26
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Granted: 1973-06-19
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Expires: 1991-02-26
Abstract
Abstract FERRITE MAGNETS ARE SHOWN WITH A COATING OF A DRY, SOLID PARTIALLY-CURED ADHESIVE, SO THAT THEY CAN BE ATTACHED TO OTHER ARTICLES, SUCH AS MAGNETIC STEEL MEMBERS, BY FINAL CURE OF THE ADHESIVE COATING UPON THE APPLICATION OF HEAT AND PRESSURE. THERE IS ALSO DISCLOSED A METHOD FOR APPLYING THE ADHESIVE IN WHICH A LAYER OF POWDERED DRY BLEND OF AN ADHESIVE COMPOSITION IS APPLIED TO A HEATED FERRITE BODY, THE ADHESIVE MELTS AND BECOMES PARTIALLY CURED, AND THE FERRITE BODY IS RAPICLY COOLED TO HOLD THE ADHESIVE IN THE PARTIALLY CURED STATE.
Inventors
- 👤 Alten T Von
- 👤 J Battige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:00
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/0221; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/17
Claims Analysis
Total Claims: 0
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |