Patents by Inventor Anders R. Axelsson

Anders R. Axelsson 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).

  • Toner for electrophotographic methods and process for preparing the same
    Patent number: 4837107
    Abstract: A toner and a method for the preparation of toner particles essentially consisting of monodisperse spherical thermoplastic particles having a coefficient of variation below 30 per cent and a mean diameter between 2 and 50 .mu.m, the particles having a shell of polymeric material in which a colorant is distributed. The particles are prepared by treating monodispersed spherical polymerized base particles with a shell-polymer and a colorant and contacted to give a uniform distribution of the additives on the base particles whereafter the shell-polymer is fused to the base particles.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: June 6, 1989
    Assignee: Casco Nobel AB
    Inventors: Anders R. Axelsson, Lolo Bylander, Sten Porrvik, Olof Tanner
  • Method for the preparation of aliphatic and alicyclic sulphonic acids by catalytic sulphoxidation of hydro-carbons
    Patent number: 3956371
    Abstract: A process for the preparation of saturated, nonbranched aliphatic or alicyclic sulphonic acids by reacting the corresponding hydrocarbons with sulphur dioxide and elementary oxygen is disclosed, in which process the reaction is carried out in the presence of copper as a catalyst. Reaction rates, considerably higher than those previously reported in literature, are obtained and the formation of by-products resulting in discolouration of the sulphonic acid is counteracted.
    Type: Grant
    Filed: September 13, 1972
    Date of Patent: May 11, 1976
    Assignee: Aminkemi AB
    Inventors: Bengt G. Bjellqvist, Torbjorn E. G. Westermark, Anders R. Axelsson, Martin J. Nilsson