Patents by Inventor James D. Willett

James D. Willett 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).

  • Phase partition separation of sperm based on seminolipid expression
    Patent number: 4722887
    Abstract: Male- and female-determining sperm are separated by polymeric phase partition chromatography, based on differential expression of a sulfoglycolipid. In a preferred embodiment, a mobile phase comprises a polymer derivatized with a sulfoglycolipid-binding protein, such as an antibody directed against the sulfoglycolipid. The sulfoglycolipid is preferably SGG.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: February 2, 1988
    Assignee: Biosyne Corporation
    Inventors: Jill D. Fabricant, James D. Willett
  • Method of obtaining neutral lipid material used as a hatching agent for sugar beet nematode
    Patent number: 4032551
    Abstract: A neutral lipid fraction derived from sugar beet, such as the seedlings of Beta vulgaris, or from sugar beet exudate has been found to be an effective hatching agent for the cysts and eggs of sugar beet nematodes.
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: June 28, 1977
    Assignee: Research Corporation
    Inventors: James D. Willett, Luther Michael Cheek
  • Hatching agent for sugar beet nematode
    Patent number: 3956485
    Abstract: A neutral lipid fraction derived from sugar beet, such as the seedlings of Beta vulgaris, or from sugar beet exudate has been found to be an effective hatching agent for the cysts and eggs of sugar beet nematodes.
    Type: Grant
    Filed: February 15, 1974
    Date of Patent: May 11, 1976
    Assignee: Research Corporation
    Inventors: James D. Willett, Luther Michael Cheek