Patents by Inventor Ivan J. Stern

Ivan J. Stern 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).

  • Method for the production of improved chymopapain
    Patent number: 4374926
    Abstract: A method of preparing a purified proteolytically active chymopapain from crude chymopapain extracts by the use of exchange resin absorption purification techniques is provided. The purified chymopapain is characterized by relative freedom from proteolytically inactive, colored and/or toxic components and by its failure to form a precipitate with barium chloride test solution (U.S.P.) under acid conditions.
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: February 22, 1983
    Assignee: Smith Laboratories, Inc.
    Inventor: Ivan J. Stern
  • Method and composition for relief of back pain
    Patent number: 4039682
    Abstract: Back pain and other symptoms of intervertebral disk disease are relieved by injecting into the diseased intervertebral disk of the back an aqueous solution of, for example, in each milliliter of solution: 3.5 mg. of cysteine hydrochloride monohydrate; 0.37 mg. of disodium edetate dihydrate; 1 mg. of sodium bisulfite, 20 mg. of sodium iothalamate; and sufficient sodium hydroxide to provide a pH of about 6.5 to the solution. The solution is free of proteolytic enzymes.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: August 2, 1977
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventors: Robert K. Ausman, Ivan J. Stern