Patents by Inventor Ronald M. Randklev

Ronald M. Randklev 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).

  • Patent number: 5814682
    Abstract: The present invention provides a method of luting a provisional prosthetic device to tooth structure using glass ionomer cement systems having reduced bulk shear adhesion. The invention also provides a kit for luting a prosthetic device to tooth structure. The kit contains at least three containers of glass ionomer luting cement compositions. The kit advantageously can be utilized for providing both a provisional and a permanent luting cement depending upon which components are admixed.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: September 29, 1998
    Inventors: Richard P. Rusin, Paula D. Ario, Dwight W. Jacobs, Joel D. Oxman, Sumita B. Mitra, Ronald M. Randklev
  • Patent number: 5015180
    Abstract: A dental tape is disclosed comprising a light-curable, non-toxic paste layered between two cover sheets, at least one of which releasably adheres to the paste, and a dental article is disclosed comprising an orthodontic bracket having a base and a light-curable, non-toxic paste sandwiched between the base and a releasably adhering substrate.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: May 14, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4972969
    Abstract: A disposable, single chamber ampule is initially provided with a single reactive component, with additional component or components added to the ampule immediately prior to use. The ampule is placed within a capsule, and the capsule is then secured in a holding mechanism of a dental amalgamator for mixing the ingredients. The ampule has flexible wall portions and may be compressed by finger pressure or by use of a dispenser in order to expel the mixed contents directly to an application site.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: November 27, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4966465
    Abstract: A flexible, disposable ampule is pre-dosed with a first ingredient, and a second ingredient is introduced into the ampule immediately before a mixing operation. The ampule conveniently fits within a rigid capsule adapted for use with a dental amalgamator which, when activated, thoroughly mixes the ingredients within the ampule. After the ingredients are mixed and the preparation is formed, the ampule is removed from the capsule and the preparation is dispensed by establishing an outlet opening and compressing the ampule between the distal phalange segments of a thumb and a finger.
    Type: Grant
    Filed: November 2, 1988
    Date of Patent: October 30, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4906185
    Abstract: A manufacture for orthodontic bracket application and removal, employing an orthodontic bracket adhesive containing a non-toxic, inorganic filler which is insoluble in mouth fluids and has a Mohs hardness less than about 4.5, together with an abrasive for removal of the adhesive. The abrasive is a non-toxic, inorganic material having a Mohs hardness greater than that of the adhesive filler but less than about 5.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: March 6, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4871261
    Abstract: A mixing apparatus includes a capsule having two or more segments which nay be uncoupled or opened for adding additional ingredients to a pre-dosed ingredient just prior to the mixing operation. The capsule includes a port which is brought into registration with a vacuum port and an adjacent passageway carried by an arm of a dental amalgamator when the capsule is mounted on the arms, and sealing engagement of the perimeter of the capsule port with the port carried by amalgamator arm enables the establishment of sub-atmospheric pressure conditions within the capsule during the mixing operation. Optionally, the ingredients are mixed in a disposable ampule carried within the capsule, and vacuum conditions are established both internally and externally of the ampule for preventing unintentional compression of the ampule. The apparatus is particularly useful for mixing materials which, after mixing, have a consistency ranging from a light cream to a thick, viscous paste.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: October 3, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4808228
    Abstract: Carboxylic acids are comminuted with fluoroaluminosilicate glass frit to form a cement powder containing carboxylate salt. The cement powder can be used to prepare glass ionomer dental cements with extended work times.
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: February 28, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4695251
    Abstract: A manufacture for orthodontic bracket application and removal, employing an orthodontic bracket adhesive containing a non-toxic, inorganic filler which is insoluble in mouth fluids and has a Mohs hardness less than about 4.5, together with an abrasive for removal of the adhesive. The abrasive is a non-toxic, inorganic material having a Mohs hardness greater than that of the adhesive filler but less than about 5.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: September 22, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4503169
    Abstract: Radiopaque, low visual opacity dental composites and non-vitreous microparticles for use therein, the microparticles individually containing amorphous silica microregions interspersed with radiopacifying polycrystalline ceramic metal oxide microregions, the microparticles being substantially free of visually opacifying inclusions such as crystalline microregions having diameters greater than about 0.4 micrometers.
    Type: Grant
    Filed: April 19, 1984
    Date of Patent: March 5, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4435160
    Abstract: A method and manufacture for orthodontic bracket application and removal, employing an orthodontic bracket adhesive containing a non-toxic, inorganic filler which is insoluble in mouth fluids and has a Mohs hardness less than about 4.5, together with an abrasive for removal of the adhesive. The abrasive is a non-toxic, inorganic material having a Mohs hardness greater than that of the adhesive filler but less than about 5.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: March 6, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4358549
    Abstract: This invention is a dental filling composition for making dental restorations. More particularly, the invention provides a radiopaque dental filling material. Specifically, the dental filling material contains a zinc-containing glass as the component imparting opacity to X-rays.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: November 9, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4350532
    Abstract: This invention provides a novel glass composition having numerous uses. More particularly, the invention provides a single phase, radiopaque glass composition.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: September 21, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: 4288355
    Abstract: A surgical cement comprised of a concentrated non-gelling aqueous solution of a polycarboxylic acid and an aqueous suspension of metal oxide powder which when mixed together form a plastic mass which is formable into the desired shape before it hardens. The surgical cement has particular utility for dental applications.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: September 8, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Harvey L. Anderson, Ronald M. Randklev
  • Patent number: RE32073
    Abstract: This invention is a dental filling composition for making dental restorations. More particularly, the invention provides a radiopaque dental filling material. Specifically, the dental filling material contains a zinc-containing glass as the component imparting opacity to X-rays.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: January 28, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev
  • Patent number: RE32299
    Abstract: This invention provides a novel glass composition having numerous uses. More particularly, the invention provides a single phase, radiopaque glass composition.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: December 2, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald M. Randklev