Patents by Inventor Thomas A. Hylton

Thomas A. Hylton 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).

  • Publication number: 20160223068
    Abstract: An example idler shaft assembly in accordance with the present disclosure may include a ring, a shaft, a dowel, and a fastener. The ring and the shaft may each have openings that are coaxial with respect to each other. The fastener may be inserted into the openings in the ring and shaft to coupled them together. The dowel may be coupled into a portion of the shaft's opening via interference fit. The ring and the shaft may be non-concentric with respect to each other.
    Type: Application
    Filed: February 2, 2015
    Publication date: August 4, 2016
    Applicant: Caterpillar Inc.
    Inventor: Thomas Hylton
  • Patent number: 4684725
    Abstract: Crystalline, non-hygroscopic adinazolam methanesulfonate, per se, preparable from xylene or preferably from a C.sub.1 to C.sub.2 -alkanol/C.sub.4 to C.sub.6 -alkyl acetate liquid mixture, aids processability of adinazolam methanesulfonate in pharmaceutical production plants.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: August 4, 1987
    Assignee: The Upjohn Company
    Inventors: Burris D. Tiffany, Steve Nichols, Paul A. Meulman, Thomas A. Hylton, Michael F. Lipton
  • Patent number: 4518799
    Abstract: Novel processes for making arylpropionic acids are described. One process comprises carboxylating particular Grignard compounds which are the products of a catalyzed reaction between corresponding arylmagnesium bromides and ethylene. Furthermore, the reaction making the particular Grignard compounds is itself novel. Also, an improved method is disclosed for making coupled aryl compounds useful as intermediates for making compounds having a pharmaceutical use. For example, particular biaryls may be used to make some of the Grignard compounds herein from which the arylpropionic acids are made. Finally, an improved bromination is disclosed giving high yields of 4-bromo-2-fluoroaniline, which is thereafter coupled with benzene, then used to make the arylmagnesium bromide reacted with ethylene to obtain the particular Grignard compound and subsequent desired arylpropionic acid, i.e. 2-(2-fluoro-4-biphenylyl)propionic acid.
    Type: Grant
    Filed: June 8, 1982
    Date of Patent: May 21, 1985
    Assignee: The Upjohn Company
    Inventor: Thomas A. Hylton
  • Patent number: 4324904
    Abstract: The invention concerns the novel compounds dialkyl 2-(3-fluoro-4-nitrophenyl)-2-methylmalonate IIIa and dialkyl 2-(3-fluoro-4-aminophenyl)-2-methylmalonate IVa useful as intermediates in an improved process for making 2-(2-fluoro-4-biphenylyl)propionic acid, known as flurbiprofen, having the formula ##STR1## and ester thereof. It has anti-inflammatory activity which is about 240 times that of aspirin and analgesic activity which is about 180 times that of aspirin in standard laboratory tests. However, despite this high activity, the toxicity (LD.sub.50) is only 1.2 to 2.4 times greater than that of aspirin in standard laboratory tests.Also within the invention is a novel method of making the above intermediates and analogs thereof useful to prepare corresponding biaryl compounds which have pharmaceutical uses.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: April 13, 1982
    Assignee: The Upjohn Company
    Inventors: Thomas A. Hylton, Jerry A. Walker
  • Patent number: 4098791
    Abstract: An improved multistep process for the production of intermediates for hypotensive compounds, which intermediates are of the formula V: ##STR1## wherein R.sub.1 and R.sub.2 are lower alkyl of 1 to 4 carbon atoms, inclusive, alkenyl of 3 or 4 carbon atoms, cycloalkyl from 3 to 7 carbon atoms, phenylalkyl in which the alkyl group is defined as above, or the group ##STR2## is a heterocyclic moiety of 4 to 8 ring members, e.g., azetidinyl, piperidino, pyrrolidinyl, hexahydroazepinyl, or heptamethyleneimino, each of which can be substituted by one or two methyl groups, N-alkylpiperazino, wherein alkyl is defined as above, morpholino, or thiomorpholino, and wherein R.sub.3 is hydrogen or alkyl of 1 to 4 carbon atoms, inclusive, starts with the corresponding secondary amine I ##STR3## wherein R.sub.1 and R.sub.2 have the significance of above.
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: July 4, 1978
    Assignee: The Upjohn Company
    Inventors: Thomas A. Hylton, Muniraj D. Pillai
  • Patent number: 4072698
    Abstract: The present invention is a chemical method for obtaining an optically pure 2-aminonitrile or a 2-aminoamide from (1) an optically impure mixture, (2) a racemic mixture, or (3) the optically pure enantiomer of the opposite configuration, in an amount greater than actually present, by use of optically active acids with a ketone or an aldehyde catalyst. Yields of greater than 70 percent of one enantiomer are obtained from racemic mixtures in very short time periods.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: February 7, 1978
    Assignee: The Upjohn Company
    Inventors: Thomas A. Hylton, Francis L. Shenton