Patents by Inventor Cherylyn Lee

Cherylyn Lee 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).

  • Melt processable poly(ester-amide) capable of forming an anisotropic melt containing an aromatic moiety capable of forming and amide linkage
    Patent number: 5919889
    Abstract: A melt processable poly(ester-amide) which is capable of forming an anisotropic melt phase is provided. A poly(ester-amide) of the present invention may have recurring units of: (a) 4-hydroxybenzoyl moiety, (b) 6-oxy-2-naphthoyl moiety, (c) 4,4'-biphenol moiety, (d) terephthaloyl moiety, and (e) an aromatic moiety capable of forming an amide linkage in the proportions indicated. Preferably, the moiety capable of forming an amide linkage is derived from p-aminophenol, p-phenylenediamine, N-acetyl-p-aminophenol, etc. The resulting poly(ester-amide) is capable of undergoing melt-processing in the temperature range of from about 300.degree. to about 400.degree. C.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: July 6, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Cherylyn Lee, Larry F. Charbonneau
  • Method of making thermotropic liquid crystalline polymers containing hydroquinone
    Patent number: 5798432
    Abstract: Liquid crystalline polymers that are made from 4-hydroxybenzoic acid, 2,6-naphthalenedicarboxylic acid, terephthalic acid, hydroquinone, and N-acetyl-4-aminophenol by heating the monomers in the presence of acetic anhydride are more easily synthesized in high molecular weight if isophthalic acid is also included as a monomer at a level of about 0.5 mole % to about 10 mole %.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: August 25, 1998
    Assignee: Hoechst Celanese Corp.
    Inventors: Cherylyn Lee, Vincent J. Provino, H. Clay Linstid, III
  • Melt processable poly(ester amide) capable of forming an anisotropic melt containing an aromatic moiety capable of forming an amide linkage
    Patent number: 5508374
    Abstract: A melt processable poly(ester-amide) which is capable of forming an anisotropic melt phase is provided. A poly(ester-amide) of the present invention may have recurring units of: (a) 4-hydroxybenzoyl moiety, (b) 6-oxy-2-naphthoyl moiety, (c) 4,4'-biphenol moiety, (d) terephthaloyl moiety, and (e) an aromatic moiety capable of forming an amide linkage in the proportions indicated. Preferably, the moiety capable of forming an amide linkage is derived from p-aminophenol, p-phenylenediamine, N-acetyl-p-aminophenol, etc. The resulting poly(ester-amide) is capable of undergoing melt-processing in the temperature range of from about 300.degree. to about 400.degree. C.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: April 16, 1996
    Assignee: Hoechst Celanese Corp.
    Inventors: Cherylyn Lee, Larry F. Charbonneau
  • Melt processable poly(ester-amide) capable of forming an anisotropic melt containing an aromatic moiety capable of forming an amide linkage
    Patent number: 5204443
    Abstract: A melt processable poly(ester-amide) which is capable of forming an anisotropic melt phase is provided. A poly(ester-amide) of the present invention may have recurring units of: (a) 4-hydroxybenzoyl moiety, (b) 6-oxy-2-naphthoyl moiety, (c) 4,4'-biphenol moiety, (d) terephthaloyl moiety, and (e) an aromatic moiety capable of forming an amide linkage in the proportions indicated. Preferably, the moiety capable of forming an amide linkage is derived from p-aminophenol, p-phenylenediamine, N-acetyl-p-aminophenol, etc. The resulting poly(ester-amide) is capable of undergoing melt-processing in the temperature range of from about 300.degree. to about 400.degree. C.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: April 20, 1993
    Assignee: Hoechst Celanese Corp.
    Inventors: Cherylyn Lee, Larry F. Charbonneau
  • Process for producing polyarylate having low color
    Patent number: 5164478
    Abstract: A process for preparing polyarylates having low color wherein isophthalic acid, terephthalic acid, and bisphenol A are melt polymerized to form a prepolymer, the prepolymer is crystallized, and then further polymerized in the solid state by heating under an inert gas flow, e.g. nitrogen. Crystallization is accomplished by adding the amorphous prepolymer in powder or pellet form to a organic crystallizing medium such as 2-ethoxyethyl acetate or hexyl acetate. This process produces a polymer having low color content. The crystallized polymer may be made amorphous by melting. This amorphous polymer is useful in applications requiring a transparent, colorless plastic.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: November 17, 1992
    Assignee: Hoechst Celanese Corp.
    Inventors: Cherylyn Lee, Larry F. Charbonneau, Gordon W. Calundann
  • Acrylic copolymers exhibiting nonlinear optical response
    Patent number: 5041510
    Abstract: This invention provides novel side chain copolymers 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: February 7, 1990
    Date of Patent: August 20, 1991
    Assignee: Hoechst Celanese Corp.
    Inventors: Diane Allen, Cherylyn Lee, Ronald N. DeMartino
  • Side chain copolymers exhibiting nonlinear optical response
    Patent number: 5041509
    Abstract: This invention provides novel side chain copolymers 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: February 7, 1990
    Date of Patent: August 20, 1991
    Inventors: Cherylyn Lee, Diane Allen, Ronald N. DeMartino, Walton, Connie R., Brian B. Marr, Jane E. Edwardsen