Patents by Inventor Randall S. Blum

Randall S. Blum 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).

  • Method for forming a peripheral edge on contact lenses
    Patent number: 4563565
    Abstract: A method of forming edges on contact lenses prepared from laser-machinable, organic polymers wherein the edge is formed by contacting the lens with a laser beam having a wavelength which is absorbed by the polymer. The radiated energy supplied to the polymer by the laser beam is such that the ratio of heat absorbed in vaporization of the polymer to heat absorbed by the polymer bulk is maximized.
    Type: Grant
    Filed: March 2, 1983
    Date of Patent: January 7, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert D. Kampfer, Randall S. Blum