Patents Represented by Attorney R. J. Hammond

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  • Method of coating carbon bodies
    Patent number: 4879182
    Abstract: Described is a way of sealing a carbon body such as monolithic graphite tooling so that it retains its vacuum integrity through numerous thermal cycles typical of thermoplastic processing. This is accomplished by (a) applying to the body surface a coating formulation composed of a carbon-filled solution of a polyamic acid formed by reaction between pyromellitic acid dianhydride and 2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane, and (b) heat curing the coated body to cause the polyamic acid to imidize into a thermally cured polyimide.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: November 7, 1989
    Assignee: Ethyl Corporation
    Inventors: J. Kenneth Presswood, Alethea H. O'Quinn
  • 15-Deoxy-16-hydroxy-16-vinyl and cyclopropyl substituted prostanoic acids and congeners
    Patent number: 4518790
    Abstract: This disclosure describes novel 15-deoxy-16-hydroxy-16- substituted prostanoic acids and congeners thereof having utility as bronchodilators as hypotensive agents, and as agents for the control of excessive gastric secretion, and particularly, alkyl esters, such as the methyl ester, of such acids.
    Type: Grant
    Filed: July 18, 1980
    Date of Patent: May 21, 1985
    Assignee: American Cyanamid Company
    Inventors: Middleton B. Floyd, Jr., Martin J. Weiss, Charles V. Grudzinskas, Sow-Mei L. Chen
  • Synthesis of d1-(methyl)-16,16-(dimethyl-11-alpha, 15-alpha, beta-dihydroxy-9-oxo-2,13,-trans,trans-prostadienoates
    Patent number: 4474979
    Abstract: A conjugate addition reaction and novel intermediate compounds are disclosed, whereby the reaction of ##STR1## with a lithio-cuprate reagent ##STR2## produces compounds of the class: ##STR3## A new process is disclosed for preparing 1-(methyl)-16,16-(dimethyl)-11-alpha-15-alpha-dihydroxy-9-oxo-2,13,trans,t rans-prostadienoate, and congeners thereof, including racemic mixtures.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: October 2, 1984
    Assignee: American Cyanamid Company
    Inventor: Middleton B. Floyd, Jr.
  • 11-Cyano-prostaglandins of the F-series
    Patent number: 4444691
    Abstract: This disclosure describes 11-deoxy-11-substituted members of the E.sub.2, F.sub.2, E.sub.1, F.sub.1, dihydro E.sub.1 and dihydro F.sub.1 prostaglandin series which are useful as hypotensive agents and as anti-ulcer agents.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: April 24, 1984
    Assignee: American Cyanamid Company
    Inventors: Charles V. Grudzinskas, Martin J. Weiss
  • 1-Hydroxymethyl-1-oxo-prostane derivatives of the F.sub.2 series
    Patent number: 4172839
    Abstract: Derivatives, analogs, and congeners of prostane having a 1-(hydroxymethyl)-1-oxo-prostane structure in the F.sub.2 series.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: October 30, 1979
    Assignee: American Cyanamid Company
    Inventor: Allan Wissner