×

Preparation of magnetic carrier particles

  • US 5,272,039 A
  • Filed: 05/04/1992
  • Issued: 12/21/1993
  • Est. Priority Date: 05/04/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for preparing carrier particles for use in the dry development of electrostatic charge patterns, comprising:

  • contacting stainless steel particles with an aqueous solution of oxalic acid;

    removing said stainless steel particles from said solution; and

    rinsing the oxalic acid from said stainless steel particles.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×