Patents by Inventor Robert G. Craig

Robert G. Craig 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).

  • Hydrophobic composite restorative materials and their use in tooth treatment
    Patent number: 4292029
    Abstract: Penetration of fluids between a tooth and a restoration is prevented, without chemical adhesive of the restorative material to the tooth by forming the restoration from a dental composition which is hydrophobic to the extent that the advancing contact angle of water or saliva on the restorative material is at least about 130.degree.. The hydrophobic nature of the contoured surface of the composite also minimizes staining by soluble dyes and accretion of hydrophilic gelatinous surface films.
    Type: Grant
    Filed: September 5, 1979
    Date of Patent: September 29, 1981
    Assignee: University of Michigan
    Inventors: Robert G. Craig, William H. Douglas
  • Protective eye shield for surgical patients
    Patent number: 4122847
    Abstract: A protective eye shield for patients during surgery comprises a flexible face mask, preferably soft, foamed plastic, for lying across the patient's brow or forehead, around the eyes and upper cheeks, and across the nose bridge, and having a pair of openings covered by transparent eye covers secured to the mask member, and a contact adhesive inner surface for securing the periphery of the mask to the face of the patient.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: October 31, 1978
    Inventor: Robert G. Craig