Patents by Inventor Frank O. Holcombe, Jr.

Frank O. Holcombe, Jr. 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).

  • Hydrophilic contact lenses and lens polymer
    Patent number: 4113686
    Abstract: A superior hydrophilic gel polymer and contact lenses therefrom are formed by bulk polymerization of about 100 parts by volume of hydroxyethyl methacrylate, 10 parts by volume of isobutyl methacrylate, 0.136 parts by volume of trimethylolpropane trimethacrylate, 1.35 parts by volume of methacrylic acid in the presence of 0.25 parts by volume of 2,5 dimethyl 2,5 bis (2-ethyl hexoyl peroxy) hexane at a temperature of about 65.degree. C to produce a material which, when hydrated, exhibits a water content of about 43% and a linear expansion of about 22%.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: September 12, 1978
    Assignee: Burton, Parsons and Company, Inc.
    Inventor: Frank O. Holcombe, Jr.
  • Hydrophilic contact lenses and lens polymer
    Patent number: 3965063
    Abstract: A superior hydrophilic gel polymer and contact lenses therefrom are formed by bulk polymerization of hydroxyethyl methacrylate, 1 to 20 weight percent N-(1,1-dimethyl-3-oxobutyl) acrylamide, or a mixture thereof with iso-butyl methacrylate, up to 5 weight percent cyclohexyl methacrylate, and about 0.01 to 0.50 weight percent trimethylolpropane trimethacrylate.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: June 22, 1976
    Assignee: Burton, Parsons and Company, Inc.
    Inventor: Frank O. Holcombe, Jr.