Patents by Inventor Richard E. Crutcher

Richard E. Crutcher 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).

  • Gibberellin A.sub.4 separation
    Patent number: 4156684
    Abstract: Gibberellin A.sub.4 can be separated from the mixture of gibberellin A.sub.4 /A.sub.7 by placing a dilute aqueous mixture thereof at the pH of at least 9 for one day or more and subsequent adjustment of the pH to below 5.5, thereby precipitating substantially pure A.sub.4.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: May 29, 1979
    Assignee: Abbott Laboratories
    Inventor: Richard E. Crutcher
  • Bacterial source of vitamin K for animal feeds
    Patent number: 3940491
    Abstract: The vitamin K is produced by bacteria which are a mixture of normal gastrointestinal flora which are fermented, spray dried and added to a feed supplement. The use is mainly for poultry but could be used also on other animals.
    Type: Grant
    Filed: April 25, 1975
    Date of Patent: February 24, 1976
    Assignee: Abbott Laboratories
    Inventors: Richard E. Crutcher, Victor W. Winkler