Patents by Inventor Rees D. Rawlings

Rees D. Rawlings has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Soft magnetic alloys
    Patent number: 4933026
    Abstract: A soft magnetic cobalt/iron alloy with high saturation magnetization comprising 0.15%-0.5% tantalum or niobium or tantalum plus niobium, 33-55% cobalt, the balance consisting of iron apart from very minor alloy ingredients and incidental impurities.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: June 12, 1990
    Inventors: Rees D. Rawlings, Rodney V. Major, Clive M. Orrock
  • Reinforceable sintered glass-ceramics
    Patent number: 4892846
    Abstract: A fibre-reinforced ceramic material is made by making a melt of glass of specified composition, cooling the melt rapidly enough for it to solidify as a glass, crushing the glass to a particle size not exceeding 70 .mu.m but preferably not exceeding 50 .mu.m mixing the powder with reinforcing fibres and heat-treating the mixture, preferably under pressure. The glass composition is: 100 parts by weight of base glass (0-30 CaO, 0-30 MgO, 5-35 Al.sub.2 O.sub.3, and 35-75 SiO.sub.2) plus 1/2-3 parts Cr.sub.2 O.sub.3 plus 1/2-10 parts of Fe.sub.2 O.sub.3 or the equivalent.This ensures the ceramic contains both surface-nucleated and internally-nucleated crystals, enhancing its properties.
    Type: Grant
    Filed: November 17, 1988
    Date of Patent: January 9, 1990
    Assignee: National Research Development Corporation
    Inventors: Philip S. Rogers, Rees D. Rawlings, Hyung S. Kim