Patents by Inventor Wayne A. Pletcher

Wayne A. Pletcher 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).

  • Heat activatable adhesive with improved temperature resistance
    Patent number: 4430479
    Abstract: A heat activatable thermoplastic adhesive composition is described which comprises (a) a thermoplastic polymer, (b) an organic polymer having a plurality of functional groups available for crosslinking, and (c) a crosslinking agent capable of reacting with (b). The adhesive compositions exhibit delayed tack and improved temperature resistance.
    Type: Grant
    Filed: December 15, 1981
    Date of Patent: February 7, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: W. Randolph Merton, Wayne A. Pletcher
  • Bonding method utilizing polyester adhesive exhibiting "open time"
    Patent number: 4173506
    Abstract: A method for forming a strong bond between a substrate and a solid thermoplastic polymer which comprises melting a thermoplastic polymer having an effective open time (a period after melting the polymer during which it remains aggressively tacky and bondable below the melting temperature), cooling it below the melting temperature, contacting the open polymer with a substrate and allowing the polymer to revert to its non-bondable, solid state. Also disclosed are a class of copolyesters suitable for use in the method and certain novel articles adapted for carrying out the method.
    Type: Grant
    Filed: August 26, 1977
    Date of Patent: November 6, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Wayne A. Pletcher
  • Non-glare glass coating
    Patent number: 4168332
    Abstract: A non-glare, abrasion resistant coating can be produced by spraying a polymerizable composition onto a surface. The composition comprises an epoxy prepolymer of an epoxy-terminated silane and an oxirane comonomer in solution. The composition may be conveniently applied from an aerosol can.
    Type: Grant
    Filed: August 10, 1978
    Date of Patent: September 18, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Roger W. Leinen, Jerome A. Pieterick, Wayne A. Pletcher, Janis Robins
  • Friction-activatable adhesive and articles thereof
    Patent number: 4066600
    Abstract: A friction-activatable adhesive composition comprising a mixture of a crystallizable linear polyester, a tackifier and, optionally, a plasticizer therefor and adhesive sticks prepared from the adhesive compositions.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: January 3, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Wayne A. Pletcher, Roy Wong
  • Adhesive composition and sheet-like product formed therewith
    Patent number: 4059715
    Abstract: A method for forming a strong bond between a substrate and a solid thermoplastic polymer which comprises melting a thermoplastic polymer having an effective open time (a period after melting the polymer during which it remains aggressively tacky and bondable below the melting temperature), cooling it below the melting temperature, contacting the open polymer with a substrate and allowing the polymer to revert to its non-bondable, solid state. Also disclosed are a class of copolyesters suitable for use in the method and certain novel articles adapted for carrying out the method.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: November 22, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Wayne A. Pletcher
  • Magnetic recording medium having segmented copolyester binder
    Patent number: 4025694
    Abstract: Magnetic recording tape, the binder of which is a segmented copolyester of crystallizable ester units ##STR1## and amorphous ester units ##STR2## where R.sub.1 may be the divalent radical of adipic acid, R.sub.2 may be the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 may be R.sub.1 or the divalent radical of C.sub.36 dimer acid, R.sub.4 may be R.sub.2 or the divalent radical of a polyetherglycol of 200-4000 molecular weight.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: May 24, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Wayne A. Pletcher, Russell L. Vermillion