Patents by Inventor Donald L. Esmay

Donald L. Esmay 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).

  • Removable pressure-sensitive adhesive tape
    Patent number: 4599265
    Abstract: A roll of pressure-sensitive adhesive tape, the adhesive layer of which is an alkyl acrylate polymer which is low-tack and yet sufficiently tacky to adhere reliably to ordinary substrates but, by virtue of being crosslinked and nearly free from polar substituents, it is readily peelable from those substrates after prolonged dwell.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: July 8, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Donald L. Esmay
  • Linerless double-coated pressure-sensitive adhesive tape
    Patent number: 4522870
    Abstract: A linerless double-coated pressure-sensitive adhesive tape of the prior art is wound directly upon itself into a roll that can later be unwound without delamination or offsetting of adhesive. The novel tape differs from the prior tape in that the pressure-sensitive adhesive at each of its faces is a substantially solvent-free, crosslinked alkyl acrylate polymer and can be aggressively tacky for uses requiring high-performance adhesion.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: June 11, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Donald L. Esmay
  • Composite of separable pressure-sensitive adhesive tapes
    Patent number: 4513039
    Abstract: Composite of two pressure-sensitive adhesive tapes which are releasably adhered together adhesive face to adhesive face and then put to individual uses. The tapes are separable because their facing adhesives are substantially solvent-free, crosslinked alkyl acrylate polymers which can be aggressively tacky for uses requiring high-performance adhesion.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: April 23, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Donald L. Esmay
  • Cellular pressure-sensitive adhesive product and method of making
    Patent number: 4415615
    Abstract: A cellular pressure-sensitive adhesive membrane comprising 15 to 85% voids that does not collapse after being briefly compressed, has remarkably good adhesion on contact with rough surfaces and remarkably good flexibility and conformability at sub-freezing temperatures.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: November 15, 1983
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Donald L. Esmay, Gordon G. Johnson, George F. Vesley
  • Polyurethane foam-backed pressure-sensitive adhesive tape
    Patent number: 3993833
    Abstract: Foam-backed pressure-sensitive adhesive tape having an open-cell polyurethane foam backing containing a foam-stabilizing fluoroaliphatic substance such as a fluoroaliphatic oligomer which affords repellency to oil and water. Moieties of the fluoroaliphatic substance similar to moieties of the polyurethane afford solubility in the polyurethane-forming mixture which is balanced against the insolubilizing effect of the carbon-bonded fluorine to concentrate the fluoroaliphatic substance at the cell membrane surfaces of the foam.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: November 23, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Donald L. Esmay
  • Linerless double-coated pressure-sensitive adhesive tape
    Patent number: RE32249
    Abstract: A linerless double-coated pressure-sensitive adhesive tape of the prior art is wound directly upon itself into a roll that can later be unwound without delamination or offsetting of adhesive. The novel tape differs from the prior tape in that the pressure-sensitive adhesive at each of its faces is a substantially solvent-free, crosslinked alkyl acrylate polymer and can be aggressively tacky for uses requiring high-performance adhesion.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: September 23, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Donald L. Esmay