Patents by Inventor Timothy Pritchett

Timothy Pritchett 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: 20230303302
    Abstract: Molded foam articles are provided. The molded foam articles are formed from polylactic acid and are capable of a number of post-processing or secondary uses. Forming the molded foam articles from polylactic acid advantageously extend the life of the molded bead foam article by permitting users to cut, heat, adhere, modify, and repurpose the molded foam articles.
    Type: Application
    Filed: March 28, 2023
    Publication date: September 28, 2023
    Inventors: Saumitra Bhargava, Jonathan Godfrey, Timothy Pritchett
  • Publication number: 20220281635
    Abstract: Fully recyclable shippers and methods of making fully recyclable shippers. The shippers are formed from polyethylene terephthalate and may include additional insulating filler material. The shippers are non-hygroscopic and, when filled with insulating filler material, have improved thermal insulating properties than other ecofriendly shippers while remaining completely recyclable by typical material reclamation facilities.
    Type: Application
    Filed: March 7, 2022
    Publication date: September 8, 2022
    Inventors: Saumitra Bhargava, Timothy Pritchett
  • Patent number: 8363300
    Abstract: A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: January 29, 2013
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert C. Hoffman, Timothy Pritchett
  • Publication number: 20120170099
    Abstract: A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer.
    Type: Application
    Filed: March 7, 2012
    Publication date: July 5, 2012
    Applicant: US GOVERNMENT AS REPRESENTED BY SECRETARY OF THE ARMY
    Inventors: Robert C. Hoffman, Timothy Pritchett
  • Patent number: 8159738
    Abstract: A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: April 17, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert C. Hoffman, Timothy Pritchett
  • Publication number: 20100321756
    Abstract: A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 23, 2010
    Applicant: U.S.Government as represented by the Secretary of the Army
    Inventors: Robert C. Hoffman, Timothy Pritchett
  • Patent number: 7751109
    Abstract: Various embodiments of an improved electro-optic shutter are disclosed. One embodiment comprises an electro-optic element, first and second polarizers, and a pair of electrodes. The electro-optic element has opposing transverse surfaces and operates as a half wave plate when a voltage V? is applied to the element. The first and second polarizers are each disposed adjacent to one transverse surface of the electro-optic element. The first and second electro-optic element have parallel transmission axes. Each electrode is disposed on one of the transverse surfaces of the electro-optic element and has an electric field which is substantially uniform over the transverse extent of the electro-optic element.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: July 6, 2010
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert C. Hoffman, Timothy Pritchett