Patents by Inventor Paul G. LeGras

Paul G. LeGras 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 manufacture of aminomethanephosphonic acid
    Patent number: 5471000
    Abstract: A process for the manufacture of aminomethanephosphonic acid comprises:a) reacting a compound of formula R--CH.sub.2 --NH--CO--NH--CH.sub.2 --R' wherein R and R', which may be the same or different, represent a phosphonation leaving group with a phosphonating agent and subsequentlyb) hydrolysing the product of step (a) to form aminomethanephosphonic acid.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: November 28, 1995
    Assignee: Zeneca Limited
    Inventors: Kenneth R. Randles, Paul G. LeGras