Patents by Inventor Lynden J. Stryker

Lynden J. Stryker 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).

  • Low porosity aggregate-containing cement composition and process for producing same
    Patent number: 4032353
    Abstract: Disclosed herein are low porosity aggregate-containing cement compositions comprising hydraulic cement containing substantially no calcium sulfate at least 0.1% alkali bicarbonate by weight based on dry ground cement, and at least 0.1% of a lignosulfonate or sulfonated lignin by weight based on dry ground cement, said aggregate-containing cement composition having been made at a water-to-cement ratio of between 0.4 and 0.15. Also, disclosed are methods for producing these low porosity aggregate-containing cements.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: June 28, 1977
    Assignee: Westvaco Corporation
    Inventors: Frank J. Ball, David V. Braddon, Lynden J. Stryker
  • Low porosity cement and process for producing same
    Patent number: 3960582
    Abstract: A method is disclosed for making low-porosity, free-flowing cement pastes with extended set times, improved workability and reduced expansion due to alkali aggregate reactions by combining hydraulic cements, especially portland-type cements, ground without gypsum with from 0.1 to about 1.0% of an alkali or alkaline earth lignosulfonate or sulfonated lignin, and 0.1 to 2.0% of an alkali bicarbonate, and combining with 20 to 40% water. Mixtures of aggregates with such low-porosity pastes made according to this process produce very workable mortars and concretes with extended set times and upon hardening have reduced expansion.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: June 1, 1976
    Assignee: Westvaco Corporation
    Inventors: Frank J. Ball, David V. Braddon, Lynden J. Stryker
  • Process for producing low porosity cement
    Patent number: 3959004
    Abstract: A method is disclosed for making low-porosity, free-flowing cement pastes with extended set times, improved workability and reduced expansion due to alkali aggregate reactions, by combining hydraulic cements, especially Portland-type cements, ground without gypsum with from 0.1% to about 1.0% of an alkali or alkaline earth lignosulfonate or sulfonated lignin, combining 20% to 40% of water with 0.1% to 2.0% of an alkali bicarbonate, and thereafter mixing together the combined cement and lignin with the combined water and alkali bicarbonate. As an alternate embodiment of this process, the alkali or alkaline earth lignosulfonate or sulfonated lignin may be added to the water-bicarbonate rather than blended directly with the cement. These low-porosity pastes when mixed with aggregates produce mortars and concretes that have extended set times and are very workable during processing.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: May 25, 1976
    Assignee: Westvaco Corporation
    Inventor: Lynden J. Stryker