Patents by Inventor David Oppong

David Oppong 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).

  • Synergistic antimicrobial compositions containing 2-(thiocyanomethylthio)benzothiazole and an organic acid
    Patent number: 5719172
    Abstract: Compositions comprising 2-(thiocyanomethylthio)benzo-thiazole and at least one organic acid or its salt are disclosed which are synergistically effective compared to the respective components alone in controlling the growth of microorganisms in or on a material or medium. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: February 17, 1998
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, C. George Hollis
  • Synergistic antimicrobial compositions containing a halogenated acetophenone and an organic acid
    Patent number: 5654330
    Abstract: Compositions for controlling the growth of microorganisms in or on a product, material or medium comprising synergistically effective amounts of halogenated acetophenones, such as 2-bromo-4-hydroxyacetophenone, and at least one organic acid, its salt or ester are disclosed. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: August 5, 1997
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, Vanja M. King
  • Synergistic antimicrobial compositions containing methylene-bis (thiocyanate) and an organic acid
    Patent number: 5633278
    Abstract: Compositions for controlling the growth of microorganisms in or on a product, material or medium comprising synergistically effective amounts of methylene-bis(thiocyanate) and at least one organic acid, its salt or ester are disclosed. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: May 27, 1997
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, Vanja M. King
  • Synergistic antimicrobial compositions containing 2-(thiocyanomethylthio) benzothiazole and an organic acid
    Patent number: 5604250
    Abstract: Compositions comprising 2-(thiocyanomethylthio)benzothiazole and at least one organic acid or its salt are disclosed which are synergistically effective compared to the respective components alone in controlling the growth of microorganisms in or on a material or medium. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: February 18, 1997
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, C. George Hollis
  • Synergistic antimicrobial compositions containing methylene-bis(thiocyanate) and an organic acid
    Patent number: 5530024
    Abstract: Compositions for controlling the growth of microorganisms in or on a product, material or medium comprising synergistically effective amounts of methylene-bis(thiocyanate) and at least one organic acid, its salt or ester are disclosed. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 25, 1996
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, Vanja M. King
  • Synergistic antimicrobial compositions containing a halogenated acetophenone and an organic acid
    Patent number: 5527826
    Abstract: Compositions for controlling the growth of microorganisms in or on a product, material or medium comprising synergistically effective amounts of halogenated acetophenones, such as 2-bromo-4-hydroxyacetophenone, and at least one organic acid, its salt or ester are disclosed. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 18, 1996
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, Vanja M. King
  • Synergistic antimicrobial compositions containing 2-(thiocyanomethylthio)benzothiazole and an organic acid
    Patent number: 5494904
    Abstract: Compositions comprising 2-(thiocyanomethylthio)benzothiazole and at least one organic acid or its salt are disclosed which are synergistically effective compared to the respective components alone in controlling the growth of microorganisms in or on a material or medium. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: February 27, 1996
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, C. George Hollis
  • Synergistic antimicrobial compositions containing a halogenated acetophenone and an organic acid
    Patent number: 5441981
    Abstract: Compositions for controlling the growth of microorganisms in or on a product, material or medium comprising synergistically effective amounts of halogenated acetophenones, such as 2-bromo-4-hydroxyacetophenone, and at least one organic acid, its salt or ester are disclosed. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: August 15, 1995
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, Vanja M. King
  • Synergistic antimicrobial compositions containing methylene-bis(thiocyanate) and an organic acid
    Patent number: 5441979
    Abstract: Compositions for controlling the growth of microorganisms in on a product, material or medium comprising synergistically effective amounts of methylene-bis(thiocyanate) and at least one organic acid, its salt or ester are disclosed. Methods to control growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: August 15, 1995
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, Vanja M. King
  • Synergistic combinations of iodopropargyl compounds with hexahydro-1,3,5-tris(2-hydroxyethyl)-S-triazine in controlling fungal and bacterial growth in aqueous fluids
    Patent number: 5374631
    Abstract: Synergistic combinations of iodopropargyl compounds and hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine for use in controlling the growth of microorganisms, such as fungi and bacteria in aqueous fluids, such as metalworking fluids.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: December 20, 1994
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, S. Rao Rayudu
  • Synergistic combinations of iodopropargyl compounds with 1,2-benzisothiazolin-3-one in controlling fungal and bacterial growth in aqueous fluids
    Patent number: 5328926
    Abstract: Synergistic combinations of iodopropargyl compounds and 1,2-benzisothiazolin-3-one for use in controlling the growth of at least one microorganism, such as fungi and bacteria in aqueous fluids, such as metalworking fluids.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: July 12, 1994
    Assignee: Buckman Laboratories International, Inc.
    Inventor: David Oppong
  • Synergistic combinations of 2-(thiocyanomethylthio)-benzothiazole with hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine in controlling fungal and bacterial growth in aqueous fluids
    Patent number: 5198440
    Abstract: Disclosed here are synergistic combinations of 2-(Thiocyanomethylthio)benzothiazole and hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine for use in controlling the growth of at least one microorganism, such as fungi and bacteria, in aqueous fluids, such as metalworking fluids. Methods of controlling the growth of at least one microorganism are also disclosed.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: March 30, 1993
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, C. George Hollis
  • Synergistic combinations of 2-(thiocyanomethylthio) benzothiazole with a mixture of 4,4-dimethyloxazolidine and 3,4,4-trimethyloxazolidine in controlling fungal and bacterial growth in aqueous fluids
    Patent number: 5196443
    Abstract: Synergistic combinations of 2-(Thiocyanomethylthio)-benzothiazole and a mixture of 4,4-dimethyloxazolidine and 3,4,4-trimethyloxazolidine for use in controlling the growth of at least one microorganism, such as fungi and bacteria, in aqueous fluids, such as metalworking fluids.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: March 23, 1993
    Assignee: Buckman Laboratories International, Inc.
    Inventors: David Oppong, C. George Hollis