Patents by Inventor Ratna Chatterjee

Ratna Chatterjee 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 the isolation of an active principle from azadirachta indica useful for controlling gastric hyperacidity and gastric ulceration
    Patent number: 5730986
    Abstract: A new process for isolation of a phenolic glycoside from Neem bark aqueous extract. This phenolic glycoside is highly potent in inhibiting gastric acid secretion and stress-induced gastric ulceration. The aqueous extract is lyophilised and the powder is extracted with petroleum ether. The insoluble residue is extracted with solvents of increasing polarity and the final residue is subjected to HPLC using a reverse phase column to isolate the active compound.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: March 24, 1998
    Assignee: Council of Scientific & Industrial Research
    Inventors: Uday Bandyopadhyay, Ratna Chatterjee, Ranajit Kumar Bandyopadhyay