Patents by Inventor John Thomas Stephan

John Thomas Stephan 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).

  • Urea treated fish egg bait
    Patent number: 3987205
    Abstract: Fish eggs which have been rendered hard and opaque by protein coagulation are made into fish egg bait by reacting them with an aqueous solution of urea under conditions predetermined to swell and plasticize the eggs and render them translucent.
    Type: Grant
    Filed: August 1, 1975
    Date of Patent: October 19, 1976
    Inventor: John Thomas Stephan
  • Urea-treating fish egg bait in acid medium
    Patent number: 3985900
    Abstract: Fish eggs which have been rendered hard and substantially opaque by coagulation of their protein content are made into fish egg bait by treating them with an aqueous acid solution of urea, i.e. with an acid salt of urea, and under conditions predetermined to swell and plasticize the eggs and render them substantially translucent.
    Type: Grant
    Filed: August 1, 1975
    Date of Patent: October 12, 1976
    Inventor: John Thomas Stephan