Patents by Inventor Howard A. Harris

Howard A. Harris 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).

  • Benzimidazobenzisoquinolinone ureas useful as grease thickeners
    Patent number: 4089854
    Abstract: Novel benzimidazo [2,1-a]benz[de] isoquinoline-7-one mono-urea compounds having the structure formula: ##STR1## wherein R is a hydrocarbyl radical of 16-22 carbon atoms, are excellent thickening agents for grease compositions employed in high temperature applications.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: May 16, 1978
    Assignee: Shell Oil Company
    Inventor: Howard A. Harris
  • Ketoheterobicyclic grease thickeners
    Patent number: 4040968
    Abstract: Novel Benzimidazo [2,1-a]benz[de] isoquinoline-7-one mono-urea compounds having the structure formula: ##STR1## wherein R is a hydrocarbyl radical of 16-22 carbon atoms, are excellent thickening agents for grease compositions employed in high temperature applications.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: August 9, 1977
    Assignee: Shell Oil Company
    Inventor: Howard A. Harris
  • Organic grease thickening agents
    Patent number: 4022700
    Abstract: Azourethane and urea compounds corresponding to the formula ##STR1## WHEREIN R is an aliphatic hydrocarbyl radical, B is oxygen or nitrogen and Ar is an arylene radical, are highly efficacious grease thickening agents.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: May 10, 1977
    Assignee: Shell Oil Company
    Inventor: Howard A. Harris