Patents by Inventor Pushpa Khann

Pushpa Khann 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).

  • Process for isolation of insulin from plant source
    Patent number: 3945988
    Abstract: A method for isolating insulin from the cultured seeds or fruit of Memordica charantia Linn in which the starting material is extracted with ethanol, water and sulfuric acid, adjusting the pH of the extract to 1.5 to 2.0 and then precipitating the insulin by adding cold ethanol and diethyl ether. Zinc traces are added to precipitate the insulin as white crude crystals which are then purified to white needle-like crystals. Comparison of this product with standard insulin by chromatography showed that the present product is substantially the same as the standard insulin.
    Type: Grant
    Filed: July 16, 1974
    Date of Patent: March 23, 1976
    Inventors: Pushpa Khann, Tej Narain Nag, Satish Chandrajain, Suchendra Mohan