Patents by Inventor Michael S. Cholod

Michael S. Cholod 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).

  • Craze resistant transparent sheet
    Patent number: 5643645
    Abstract: A melt calendered sheet and a process for making melt calendered sheet having excellent transparency and solvent craze resistance. Clear melt calendered sheet having a critical stress rating above 12,000 KPa, heat distortion temperature above 85.degree. C., and flexural modulus above 3,275 MPa is produced from acrylic copolymer having a melt flow rate of from about 0.3 to about 1.3 grams/10 minutes.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 1, 1997
    Assignee: Ato Haas B.V.
    Inventors: Harold Reid Banyay, Michael S. Cholod, Laurence Mitchell Kolanko, Bonnie Vineis Smith
  • Craze resistant transparent sheet
    Patent number: 5549941
    Abstract: A melt calendered sheet and a process for making melt calendered sheet having excellent transparency and solvent craze resistance. Clear melt calendered sheet having a critical stress rating above 12,000 KPa, heat distortion temperature above 85.degree. C., and flexural modulus above 3,275 MPa is produced from acrylic copolymer having a melt flow rate of from about 0.3 to about 1.3 grams/10 minutes.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: August 27, 1996
    Assignee: Atohaas Bolding C.V.
    Inventors: Harold R. Banyay, Michael S. Cholod, Laurence M. Kolanko, Bonnie V. Smith
  • Copolyester of polyethylene terephthalate and bis (4-beta hydroxy ethoxy phenyl) sulfone
    Patent number: 4547563
    Abstract: A copolyester of polyethylene terephthalate and bis (4-beta hydroxy ethoxy phenyl) sulfone and a process for its preparation are provided. The copolyester has an intrinsic viscosity, glass transition temperature, and impact strength comparable to polyethylene terephthalate homopolymer but exhibits an increased crystallization time and is capable of being molded into clear articles. The process for preparing the copolyester comprises the steps of forming a polyethylene terephthalate prepolymer and polycondensing the prepolymer, preferably in the solid phase, with from about 2 to about 5 mole percent of bis (4-beta hydroxy ethoxy phenyl) sulfone in the presence of a suitable metallic catalyst system.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: October 15, 1985
    Assignee: Rohm and Haas Company
    Inventor: Michael S. Cholod
  • Preparation of methacrolein and methacrylonitrile from tert-butyl alkanoates
    Patent number: 4443383
    Abstract: The present invention relates to a process of the conversion of tert-butyl alkanoates to methacrolein or methacrylonitrile, and more particularly to a process for the conversion of tert-butyl acetate to methacrolein or methacrylonitrile.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: April 17, 1984
    Assignee: Rohm and Haas Company
    Inventors: Joseph W. Nemec, Michael S. Cholod
  • Copolyester of polyethylene terephthalate and sulfonyl diphenol
    Patent number: 4436893
    Abstract: A copolyester of polyethylene terephthalate and sulfonyl diphenol and a process for its preparation are provided. The copolyester has an instrinsic viscosity, glass transition temperature, and impact strength comparable to polyethylene terephthalate homopolymer but exhibits an increased crystallization time and is capable of being molded into clear articles. The process for preparing the copolyester comprises the steps of forming a polyethylene terephthalate prepolymer and polycondensing the prepolymer, preferably in the solid phase, with from about 2 to about 20 mole percent of sulfonyl diphenol in the presence of a suitable metallic catalyst system.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: March 13, 1984
    Assignee: Rohm and Haas Company
    Inventor: Michael S. Cholod
  • Preparation of methacrolein and methacrylonitrile from tert-butyl alkanoates
    Patent number: 4358622
    Abstract: The present invention relates to a process of the conversion of tert-butyl alkanoates to methacrolein or methacrylonitrile, and more particularly to a process for the conversion of tert-butyl acetate to methacrolein or methacrylonitrile.
    Type: Grant
    Filed: March 19, 1981
    Date of Patent: November 9, 1982
    Assignee: Rohm and Haas Company
    Inventors: Joseph W. Nemec, Michael S. Cholod
  • Catalyst system for a polyethylene terephthalate polycondensation
    Patent number: 4356299
    Abstract: A polyethylene terephthalate polycondensation catalyst system comprises from about 2 parts to about 18 parts of catalyst metal in the form of an alkyl titanate and from about 40 parts to about 300 parts of catalyst metal in the form of an antimony compound, each of said metals being per million parts of polymer product.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: October 26, 1982
    Assignee: Rohm and Haas Company
    Inventors: Michael S. Cholod, Nipun M. Shah