Patents by Inventor Walter Hasselman, Jr.

Walter Hasselman, Jr. 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).

  • Process for the preparation of phenol-urea-formaldehyde condensation products
    Patent number: 4345061
    Abstract: This invention relates to cellular plastic compositions of condensation products of phenol-urea and formaldehyde useful for thermal and acoustical insulation and methods for their preparation in which the phenol is present in amounts of about 1 to about 20 percent by weight wherein the condensation product prior to foaming and setting as a rigid cellular plastic has a viscosity at room temperature of approximately 30 to 36 seconds, No. 1 Zahn cup, and a pH maintained in the range of about 6 to 8.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: August 17, 1982
    Assignee: C.P. Chemical Co., Inc.
    Inventor: Walter Hasselman, Jr.
  • Phenal-urea-formaldehyde condensation product
    Patent number: 4239881
    Abstract: This invention relates to cellular plastic compositions of condensation products of phenol-urea and formaldehyde useful for thermal and acoustical insulation and methods for their preparation in which the phenol is present in amounts of about 1 to about 20 percent by weight wherein the condensation product prior to foaming and setting as a rigid cellular plastic has a viscosity at room temperature of approximately 30 to 36 seconds, No. 1 Zahn cup, and a pH maintained in the range of about 6 to 8.
    Type: Grant
    Filed: December 27, 1978
    Date of Patent: December 16, 1980
    Assignee: C.P. Chemical Company, Inc.
    Inventor: Walter Hasselman, Jr.