Patents by Inventor William H. Dalzell

William H. Dalzell 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: 20200247773
    Abstract: Chromatography systems and methods for using carbon dioxide to separate one or more cannabis-derived compounds from other components of a mixture are generally described. Some of the methods described herein comprise transporting a mixture comprising a first cannabis-derived compound and one or more other components through a chromatography column containing a stationary phase comprising a packing material. In some embodiments, the mixture is transported through the column within a mobile phase that comprises carbon dioxide (e.g., supercritical CO2, liquid CO2). The mobile phase may be substantially free of a co-solvent that is in liquid phase at standard room temperature and pressure. In some embodiments, the mobile phase is free of any co-solvent and comprises 100 vol % carbon dioxide.
    Type: Application
    Filed: August 7, 2018
    Publication date: August 6, 2020
    Applicant: Massachusetts Institute of Technology
    Inventors: Clark K. Colton, John M. Moses, Veronica M. Wilson, William H. Dalzell, Mariya Layurova, Tony J. Elian, Truong H. Cai, John MacKay
  • Patent number: 9969856
    Abstract: Composites, such as syntactic foams, are described. The composite contains at least one polymer and at least one aerogel. The aerogel is coated with a coating substance to at least substantially prevent the intrusion of the polymer into the pores of the aerogel. Methods of making the composite are also described, as well as uses of the composite.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: May 15, 2018
    Assignee: Cabot Corporation
    Inventors: Jameel Menashi, Ulrich Bauer, Elmar Pothmann, Andrew A. Peterson, Anna K. Wilkins, Mihai Anton, Dhaval A. Doshi, William H. Dalzell
  • Patent number: 9365972
    Abstract: A process for producing a water-absorbent high-porosity fibrous matrix from lignocellulosic raw materials, comprising wet mechanical processing of the raw material, drying, and then dry mechanical processing the fibers to provide a fibrous matrix is provided. The high-porosity fibrous matrix and absorbent articles prepared therefrom are also provided.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: June 14, 2016
    Assignee: Sustainable Health Enterprises (SHE)
    Inventors: Elizabeth Scharpf, Bernice Liying Huang, Hannah Hale, Joshua Velson, Sina Salehi Omran, Jeffrey Zhou, Rachel B. Licht, Clark K. Colton, William H. Dalzell
  • Publication number: 20150152597
    Abstract: A process for producing a water-absorbent high-porosity fibrous matrix from lignocellulosic raw materials, comprising wet mechanical processing of the raw material, drying, and then dry mechanical processing the fibers to provide a fibrous matrix is provided. The high-porosity fibrous matrix and absorbent articles prepared therefrom are also provided.
    Type: Application
    Filed: December 5, 2014
    Publication date: June 4, 2015
    Inventors: Elizabeth SCHARPF, Liying HUANG, Hannah BRICE, Joshua VELSON, Sina Salehi OMRAN, Jeffrey ZHOU, Rachel B. LICHT, Clark K. COLTON, William H. DALZELL
  • Patent number: 8936697
    Abstract: A process for producing a water-absorbent high-porosity fibrous matrix from lignocellulosic raw materials, comprising wet mechanical processing of the raw material, drying, and then dry mechanical processing the fibers to provide a fibrous matrix is provided. The high-porosity fibrous matrix and absorbent articles prepared therefrom are also provided.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: January 20, 2015
    Assignee: Sustainable Health Enterprises
    Inventors: Elizabeth Scharpf, Liying Huang, Hannah Brice, Joshua Velson, Sina Salehi Omran, Jeffrey Zhou, Rachel B. Licht, Clark K. Colton, William H. Dalzell
  • Publication number: 20080287561
    Abstract: Composites, such as syntactic foams, are described. The composite contains at least one polymer and at least one aerogel. The aerogel is coated with a coating substance to at least substantially prevent the intrusion of the polymer into the pores of the aerogel. Methods of making the composite are also described, as well as uses of the composite.
    Type: Application
    Filed: April 18, 2008
    Publication date: November 20, 2008
    Applicant: CABOT CORPORATION
    Inventors: Jameel Menashi, Ulrich Bauer, Elmar Pothmann, Andrew A. Peterson, Anna K. Wilkins, Mihai Anton, Dhaval A. Doshi, William H. Dalzell
  • Patent number: 5805336
    Abstract: A thermoformed plastic laminar light-polarizing composite lens blank is produced from a laminate comprising a light-polarizing layer between polymeric layers. The absorption axis of the light-polarizing layer of the laminate is aligned to substantial parallelism with a principal index of refraction of the polymeric layer which forms the convex surface of the lens blank and which is birefringent, thereby to minimize retardation effects of the birefringent material on plane polarized light. The polymeric layer which forms the concave surface of the lens blank is substantially thicker than the opposed polymeric layer in order to accommodate grinding of the surface thereof to an ophthalmic prescription. Thermoforming of unitary portions cut from a supply of the laminate is performed under heat and pressure.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: September 8, 1998
    Assignee: Polaroid Corporation
    Inventors: William H. Dalzell, Igor Loshak
  • Patent number: 5751481
    Abstract: A thermoformed plastic laminar light-polarizing composite lens blank is produced from a laminate including light-polarizing layer between polymeric layers. At least one of the polymeric layers is an optically isotropic sheet, i.e., a sheet having an optical retardance of 20 nanometers in order to minimize retardation effects of the birefringent material on plane polarized light. The isotropic layer or subsequent thermoforming of unitary portions cut from the laminate provides the convex lens surface of the lens blank. The polymeric layer which forms the concave surface of the lens blank is substantially thicker than the opposed polymeric layer in order to accommodate grinding of the surface thereof to an ophthalmic prescription. Lens blanks are prepared from unitary portions which are cut from a supply of the laminate, placed between thermoforming platens and formed under heat and pressure.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: May 12, 1998
    Assignee: Polaroid Corporation
    Inventors: William H. Dalzell, Igor Loshak
  • Patent number: 5434707
    Abstract: Plastic lenses having substantially no optical power and a light-polarizing layer therein are prepared by shaping composite laminate of the light-polarizing layer between opposed sheets of thermoplastic material by heating and pressing the laminate between opposed shaping molds (platens), the platens having predetermined radii of curvature for the production of a lens having substantially no optical power. Shaping is effected under conditions of heating and pressing sufficient to cause flow of the thermoplastic sheets and conformation thereof to the respective curvatures of the forming surfaces of the platens. The lenses are especially suited as sunglass lenses for spectacles.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: July 18, 1995
    Assignee: Polaroid Corporation
    Inventors: William H. Dalzell, Igor Loshak, Nancy J. Gettens, Carole L. G. McCarthy