Patents by Inventor Diane E. Allen

Diane E. Allen 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: 7906679
    Abstract: Materials for making apparatus and a method of inhibiting polymerization during manufacture, purification, handling and storage of subject ethylenically unsaturated monomers are disclosed. In particular, copper or metals containing copper, in the presence of oxygen, have inhibit undesired polymerization resulting in polymer fouling in apparatus used during the manufacture, purification, handling and storage of the monomers, such as acrylic acid, methacrylic acid, acrylic acid esters and methacrylic acid esters. The copper or copper alloys as described herein, in the presence of an oxygen-containing gas, exhibit self-inhibiting surface characteristics when used to make at least a portion of the apparatus to inhibit polymerization of the monomers in contact with the portion of the apparatus including such copper-containing metal.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: March 15, 2011
    Assignee: Arkema Inc.
    Inventors: Salvador Aldrett-Lee, Diane E. Allen, Olan Stanley Fruchey, Roger L. Roundy, Tao Wang
  • Publication number: 20080228002
    Abstract: Materials for making apparatus and a method of inhibiting polymerization during manufacture, purification, handling and storage of subject ethylenically unsaturated monomers are disclosed. In particular, copper or metals containing copper, in the presence of oxygen, have inhibit undesired polymerization resulting in polymer fouling in apparatus used during the manufacture, purification, handling and storage of the monomers, such as acrylic acid, methacrylic acid, acrylic acid esters and methacrylic acid esters. The copper or copper alloys as described herein, in the presence of an oxygen-containing gas, exhibit self-inhibiting surface characteristics when used to make at least a portion of the apparatus to inhibit polymerization of the monomers in contact with the portion of the apparatus including such copper-containing metal.
    Type: Application
    Filed: September 24, 2003
    Publication date: September 18, 2008
    Inventors: Salvador Aldrett-Lee, Diane E. Allen, Olan Stanley Fruchey, Roger L. Roundy, Tao Wang
  • Patent number: 5763608
    Abstract: The present invention provides a process for preparing a 5,6-dihydro-3H-pyrimidin-4-one derivatives which comprises the steps of (a) dehydrating a N-acyl beta amino acid in the presence of a dehydration agent and an organic solvent for a sufficient period of time and under suitable temperature and pressure conditions to form an oxazone (b) adding a carboxylic acid and a primary amine salt of a carboxylic acid to said oxazone to form a mixture, (c) distilling azeotropically said mixture for a suitable period of time and under suitable temperature and pressure conditions to substantially remove said dehydration agent and said organic solvent, and (d) heating the product of step (c) for a sufficient period of time and under suitable temperature and pressure conditions to form said pyrimidin derivatives.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: June 9, 1998
    Assignee: Hoechst Celanese Corporation
    Inventors: Apurba Bhattacharya, Diane E. Allen
  • Patent number: 5739330
    Abstract: The present invention provides a process for preparing a quinazolone which comprises the steps of (a) dehydrating a N-acyl beta amino acid in the presence of a dehydration agent and an organic solvent for a sufficient period of time and under suitable temperature and pressure conditions to form an oxazone (b) adding a carboxylic acid and a primary amine salt of a carboxylic acid to said oxazone to form a mixture, (c) distilling azeotropically said mixture for a suitable period of time and under suitable temperature and pressure conditions to substantially remove said dehydration agent and said organic solvent, and (d) heating the product of step (c) for a sufficient period of time and under suitable temperature and pressure conditions to form said quinazolone.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: April 14, 1998
    Assignee: Hoechst Celanese Corporation
    Inventors: Apurba Bhattacharya, Diane E. Allen
  • Patent number: 5574196
    Abstract: A process for preparing tertiary alkanols which comprises the step of oxidizing with ozone a saturated hydrocarbon having a tertiary carbon center in the presence of a carboxylic acid and for a sufficient period of time and at suitable temperature and pressure to form said alkanols.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: November 12, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Charles E. Tucker, Diane E. Allen, Charles C. Hobbs
  • Patent number: 5498802
    Abstract: A process for preparing 6-chloro-2-hexanone which comprises the steps of (a) dehydrating cyclohexanol in the presence of a suitable catalyst and at a suitable temperature and for a sufficient period of time to form cyclohexene; (b) rearranging said cyclohexene at a higher temperature than in step (a) in the presence of a suitable catalyst and for a sufficient period of time to form 1-methylcyclopentene; (c) hydrating said 1-methylcyclopentene at a temperature lower than step (b) and in the presence of a resin catalyst for a sufficient period of time to form 1-methylcyclopentanol; (d) reacting said 1-methylcylcopentanol with a suitable amount of an alkali metal hypochlorite in the presence of a carboxylic acid to form 1-methylcyclopentyl hypochlorite; and (e) heating said 1-methylcyclopentyl hypochlorite for a sufficient period of time to form 6-chloro-2-hexanone.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: March 12, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Diane E. Allen, Ramakrishnan Chidambaram
  • Patent number: 5491265
    Abstract: A process for preparing 6-chloro-2-hexanone which comprises the steps of (a) oxidizing methylcyclopentane with ozone in the presence of a carboxylic acid and for a sufficient period of time to form 1-methylcyclopentanol; (b) reacting said 1-methylcyclopentanol with a suitable amount of an alkali metal hypochlorite in the presence of a carboxylic acid to form 1-methylcyclopentyl hypochlorite; and (c) heating said 1-methylcyclopentyl hypochlorite for a sufficient period of time to form 6-chloro-2-hexanone.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: February 13, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Diane E. Allen, Charles E. Tucker, Charles C. Hobbs, Ramakrishnan Chidambaram
  • Patent number: 5247042
    Abstract: This invention provides novel side chain polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in all-optical and electrooptical light switch and light modulator devices.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: September 21, 1993
    Assignee: Hoechst Celanese Corp.
    Inventors: Diane E. Allen, Ronald N. DeMartino, Hyun-Nam Yoon
  • Patent number: 5196509
    Abstract: In one embodiment this invention provides polymalonamide polymers with side chains which exhibit nonlinear optical response.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: March 23, 1993
    Assignee: Hoechst Celanese Corp.
    Inventor: Diane E. Allen
  • Patent number: 5100985
    Abstract: In one embodiment this invention provides novel organic compounds and polymers characterized by a 1,4-bis(4-arylbutadienyl)benzene structure which exhibits third order nonlinear optical response.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: March 31, 1992
    Assignee: Hoechst Celanese Corp.
    Inventor: Diane E. Allen
  • Patent number: 4978476
    Abstract: This invention provides novel side chain polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in all-optical and electrooptical light switch and light modulator devices.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: December 18, 1990
    Assignee: Hoechst Celanese Corp.
    Inventors: Diane E. Allen, Ronald N. DeMartino