Magnetic chips for barrel finishing and process for producing the same
Abstract
Abstract THIS INVENTION RELATES TO HARDENED MAGNETIC CHIPS FOR USE IN BARREL-FINISHING OF METAL BODIES FORMED BY PRESING OR DIE-CASTING, AND TO A PROCESS FOR PRODUCING SUCH CHIPS. THE DISCLOSED MAGNETIC CHIPS ARE SUBSTANTIALLY IN A GRANULAR FORM AND HAVE HIGH MAGNETIC AND HIGH ABRASIVE PROPERTIES, SUBSTANTIALLY COMPRISING A POWDERY MAGNETIC MATERIAL A MEDIUM SELECTED FROM THE GROUP CONSISTING OF METAL COMPOUND AQUEOUS SOLUTION AND AN ACID DENATURED ALUMINA, AND A LAMINATING HARDENING AGENT CONTAINING AT LEAST ONE SELECTED FROM THE GROUP CONSISTING OF KAOLIN, CLAY, FRIT, LIME AND BORIC ACID, SAID POWDERY MAGNETIC MATERIAL BEING COATED WITH SAID LAMINATING HARDENING AGENT THROUGH SAID MEDIUM.
Inventors
- 👤 Sakae Fukui
- 👤 Hisamine Kobayashi
Bibliographic Details
Claims Analysis
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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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |