Patents by Inventor Robin T. Gray

Robin T. Gray 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).

  • Cyclohexane derivatives
    Patent number: 4352937
    Abstract: Novel cyclohexane derivatives of the formula: ##STR1## wherein R.sup.1 represents an alkyl group, R.sup.2 and R .sup.3 each represents a hydrogen atom or an alkyl group, and X represents an epoxy or hydroxy group; are useful as aroma chemicals.
    Type: Grant
    Filed: August 14, 1978
    Date of Patent: October 5, 1982
    Assignee: Shell Oil Company
    Inventors: Robin T. Gray, Aaldert J. De Jong
  • Cyclopentane aldehydes
    Patent number: 4168281
    Abstract: Novel cyclopentane derivatives of the formula: ##STR1## wherein R.sup.1 and R.sup.4 each represents an alkyl group and R.sup.2 and R.sup.3 each represents a hydrogen atom or alkyl group, are useful as aroma chemicals.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: September 18, 1979
    Assignee: Shell Oil Company
    Inventors: Robin T. Gray, Aaldert J. De Jong
  • Tertiary alcohols
    Patent number: 4125484
    Abstract: Novel tertiary alcohols of the general formula: ##STR1## in which R.sub.1 represents an alkenyl or a cycloalkyl or cycloalkenyl optionally substituted by one or more alkyl groups, R.sub.2 represents hydrogen or alkyl; or R.sub.1 and R.sub.2, together with the carbon atom to which they are linked, from a bicyclo group optionally substituted by up to two alkyl groups; R.sub.3 and R.sub.4 each represents an alkyl group, and Y represents a divalent aliphatic group of up to 4 carbon atoms, are disclosed along with their use as aroma chemicals and a process for their preparation.
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: November 14, 1978
    Assignee: Shell Oil Company
    Inventors: Robin T. Gray, Aaldert J. De Jong
  • Process for the preparation of 2,2-bis(3,5-di-t-butyl-4-hydroxyphenyl)propane
    Patent number: 4073815
    Abstract: A process for the preparation of 2,2-bis(3,5-di-t-butyl-4-hydroxyphenyl)propane by reacting isobutylene with diphenylolpropane in the presence of a substantially anhydrous aromatic sulfonic acid.
    Type: Grant
    Filed: October 19, 1976
    Date of Patent: February 14, 1978
    Assignee: Shell Oil Company
    Inventors: John W. Cornforth, John A. Schofield, Sidney J. French, Robin T. Gray
  • Macrocyclic polyethers
    Patent number: 4072693
    Abstract: Macrocyclic polyethers, their preparation, complexes of these macrocyclic polyethers and their preparation are described.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: February 7, 1978
    Assignee: Shell Oil Company
    Inventors: David N. Reinhoudt, Robin T. Gray