Patents by Inventor Marsha L. Langhorst

Marsha L. Langhorst 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: 11254793
    Abstract: The present invention provides thermosetting resin pre-impregnated or infused fiber materials or prepregs comprising a thermosetting resin mixture and a fiber material component of a heat resistant fiber, such as carbon fiber, having an areal weight of from 500 to 3,000 g/m2 having a coating of from 0.5 to 4 phr of a latent, particulate curative or solid curative, preferably, dicyandiamide, wherein the prepregs are infused with a thermosetting resin mixture comprising (a) at least one liquid epoxy resin, and (b) a hardener and/or a catalyst, as well as methods of making the same. The prepregs of present invention enables the simple provision of lightweight composites having consistent resin cure throughout.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: February 22, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: David H. Bank, Richard Baumer, Kevin J. Bouck, Jun Cai, Marsha L. Langhorst, Abhijit A. Namjoshi, Weijun Wang
  • Publication number: 20210292499
    Abstract: The present invention provides thermosetting resin pre-impregnated or infused fiber materials or prepregs comprising a thermosetting resin mixture and a fiber material component of a heat resistant fiber, such as carbon fiber, having an areal weight of from 500 to 3,000 g/m2 having a coating of from 0.5 to 4 phr of a latent, particulate curative or solid curative, preferably, dicyandiamide, wherein the prepregs are infused with a thermosetting resin mixture comprising (a) at least one liquid epoxy resin, and (b) a hardener and/or a catalyst, as well as methods of making the same. The prepregs of present invention enables the simple provision of lightweight composites having consistent resin cure throughout.
    Type: Application
    Filed: August 30, 2017
    Publication date: September 23, 2021
    Inventors: David H. Bank, Richard Baumer, Kevin J. Bouck, Jun Cai, Marsha L. Langhorst, Abhijit A. Namjoshi, Weijun Wang
  • Publication number: 20100112122
    Abstract: A method of reducing the amount of saturated fatty acids capable of being absorbed by an animal body relative to the amount of unsaturated fatty acids capable of being absorbed by an animal body in or from a fat-containing food product comprises the steps of i) identifying a food product comprising one or more saturated fatty acids and one or more unsaturated fatty acids, and ii) incorporating one or more water-soluble cellulose derivatives in the food product or administering one or more water-soluble cellulose derivatives before, during or after the consumption of the food product.
    Type: Application
    Filed: April 30, 2008
    Publication date: May 6, 2010
    Inventors: Yun-Jeong Hong, Scott A. Young, Maciej Turowski, Wallace H. Yokoyama, Marsha L. Langhorst, David R. Albers
  • Patent number: 5235843
    Abstract: A sample of a volatile chemical component-containing liquid is segmented in stream flow with a gas with the volatile components partitioning or separating into the two phases, the gas then being separated from the stream and the volatile components therein analyzed for identification and concentration.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: August 17, 1993
    Assignee: The Dow Chemical Company
    Inventor: Marsha L. Langhorst
  • Patent number: 4818264
    Abstract: A multicapillary gas chromatography column comprising a bundle of single capillary columns each of which have essentially the same internal diameter and which are coated with essentially the same thickness of essentially the same stationary phase so that each column has essentially the same standard retention factor. A method of producing such a column is to cut a single fused silica capillary column into a number of essentially equal lengths and then to bundle the lengths together. Each bundle end can then be inserted into, for example, a graphite ferrule and then the multicapillary column can be conventionally installed into a gas chromatograph. The multicapillary column of the invention has the injection, detection and sample capacity advantages of a relatively large diameter capillary column with the speed and resolving power of a relatively narrow diameter capillary column.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: April 4, 1989
    Assignee: The Dow Chemical Company
    Inventor: Marsha L. Langhorst
  • Patent number: 4612019
    Abstract: A device for separating water vapor from a sample of air has been developed. The device utilizes a water permeable membrane to separate the water vapor from an air stream containing other vapors, for example, organic vapors. The device is applicable, for example, in industrial hygiene applications to reduce or change humidity in an air stream prior to collection of organics on a sorbent tube.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: September 16, 1986
    Assignee: The Dow Chemical Company
    Inventor: Marsha L. Langhorst