Patents by Inventor Richard H. Hall

Richard H. Hall 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).

  • Patent number: 4460572
    Abstract: A fumigant swellable fumigant insoluble cross-linked polymer is swollen with volatile fumigant such as 1,3-dichloropropene. Fumigant is released at a slower rate than if polymer is not employed.
    Type: Grant
    Filed: May 13, 1983
    Date of Patent: July 17, 1984
    Assignee: The Dow Chemical Company
    Inventors: Robert L. Derby, Richard H. Hall, Howard L. Young
  • Patent number: 4302337
    Abstract: Water containing traces of oil is cleaned by passing the oil containing water through a foraminous body, the foraminous body having a coating on the surface thereof of an oil-imbibing, oil-swellable latex polymer in a quantity sufficient to blind the foraminous body when the latex is oil swollen.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: November 24, 1981
    Assignee: The Dow Chemical Company
    Inventors: Edwin G. Larson, Daniel H. Haigh, Richard H. Hall
  • Patent number: 4233467
    Abstract: .alpha.-Alkylbenzyl alcohol and substituted .alpha.-alkylbenzyl alcohols are converted in high yield and purity to styrene and substituted styrenes by contacting the alcohol in vapor phase with a high efficiency silica gel catalyst.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: November 11, 1980
    Assignee: The Dow Chemical Company
    Inventors: Junior J. Lamson, Richard H. Hall, Edward Stroiwas, Larry D. Yats
  • Patent number: 4213831
    Abstract: Unstabilized vinylbenzyl chloride and substituted vinylbenzyl chlorides are essentially inert with respect to surfaces of aluminum or alloys containing at least 90 percent by weight of aluminum in sharp contrast to benzyl chloride and similar substituted benzyl halides. Aluminum and such alloys of aluminum are thus practical materials of construction for making containers, pipes, stills, still column packing and the like for handling vinylbenzyl chloride.
    Type: Grant
    Filed: October 30, 1972
    Date of Patent: July 22, 1980
    Assignee: The Dow Chemical Company
    Inventors: Richard H. Hall, Daniel H. Haigh, Robert D. Hansen
  • Patent number: 4178327
    Abstract: Ar-halo-ar(t-alkyl)styrenes, e.g., 2-chloro-4-(t-butyl)styrene, polymerize to form materials having unusually high temperature resistance. Additionally, compositions of such monomers, unsaturated polyesters and free-radical generating catalysts cure at lower temperatures and in less time than similar compositions containing conventional styrene monomers.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: December 11, 1979
    Assignee: The Dow Chemical Company
    Inventors: Richard H. Hall, Daniel H. Haigh, Junior J. Lamson, Larry D. Yats
  • Patent number: 4172031
    Abstract: Water containing traces of oil is cleaned by passing through a porous bed containing oleophilic bodies and oil imbibing bodies. Oil is collected on the surface of the oleophilic bodies and removed from the oleophilic bodies by the oil imbibing bodies. Such beds have a high capacity for oil retention while maintaining separating efficiency.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: October 23, 1979
    Assignee: The Dow Chemical Company
    Inventors: Richard H. Hall, Daniel H. Haigh, Edwin G. Larson
  • Patent number: 4150059
    Abstract: .alpha.-Alkylbenzyl alcohol and substituted .alpha.-alkylbenzyl alcohols are converted in high yield and purity to styrene and substituted styrenes by contacting the alcohol in vapor phase with silica gel and steam.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: April 17, 1979
    Assignee: The Dow Chemical Company
    Inventors: Junior J. Lamson, Richard H. Hall, Edward Stroiwas, Larry D. Yats
  • Patent number: 4054733
    Abstract: Ar-halo-ar(t-alkyl)styrenes, e.g., 2-chloro-4-(t-butyl)styrene, polymerize to form materials having unusually high temperature resistance. Additionally, compositions of such monomers, unsaturated polyesters and free-radical generating catalysts cure at lower temperatures and in less time than similar compositions containing conventional styrene monomers.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: October 18, 1977
    Assignee: The Dow Chemical Company
    Inventors: Richard H. Hall, Daniel H. Haigh, Junior J. Lamson, Larry D. Yats
  • Patent number: 4049736
    Abstract: .alpha.-Alkylbenzyl alcohol and substituted .alpha.-alkylbenzyl alcohols are converted in high yield and purity to styrene and substituted styrenes by contacting the alcohol in vapor phase with silica gel and steam.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: September 20, 1977
    Assignee: The Dow Chemical Company
    Inventors: Junior J. Lamson, Richard H. Hall, Edward Stroiwas, Larry D. Yats
  • Patent number: 4024882
    Abstract: A valve is disposed in a line carrying an aqueous stream, the valve in the form of a permeable bed of particulate swellable polymer particles which imbibe organic materials and on contact therewith will swell to provide a positive shut-off and a polymeric structure which collapses on contact with organic liquid is disposed upstream of the permeable bed. Flow rates can be obtained which are higher than the flow rates with polymer particles alone.
    Type: Grant
    Filed: May 5, 1976
    Date of Patent: May 24, 1977
    Assignee: The Dow Chemical Company
    Inventors: Daniel H. Haigh, Richard H. Hall
  • Patent number: 3999653
    Abstract: A package containing a hazardous liquid is provided. The package comprises a container which is generally impermeable to a hazardous liquid contained therein, the container being subject to discharge of its contents when subjected to impact. The container is disposed within a first jacket of a liquid permeable material of sufficient strength to contain fragments of the container on rupture thereof. A second jacket is provided over first jacket, the second jacket having at least an inner wall and outer wall, the inner wall being liquid permeable, a hazardous liquid swellable body being contained between the inner wall and outer wall and being generally co-extensive with the inner wall and the outer wall, and a third jacket of a hazardous liquid vapor impervious membrane. The package provides substantial improvement in safety when transporting a container containing a hazardous liquid.
    Type: Grant
    Filed: March 11, 1975
    Date of Patent: December 28, 1976
    Assignee: The Dow Chemical Company
    Inventors: Daniel H. Haigh, Richard H. Hall, Edwin G. Larson
  • Patent number: 3958590
    Abstract: A package which comprises a conventional sheet metal can having a bottom and top which is joined to a tubular body by means of peripheral crimps about the periphery of the top and bottom is provided wherein a flexible plastic foam is disposed beneath the ends of the container and between the container and the crimped edge portions. The foam provides a seal in the regions of the crimping and acts as a retainer for particulate material within the package. The construction is particularly useful for imbiber bead valves.
    Type: Grant
    Filed: December 12, 1974
    Date of Patent: May 25, 1976
    Assignee: The Dow Chemical Company
    Inventors: Richard H. Hall, Daniel H. Haigh