Patents by Inventor Douglas E. Prather

Douglas E. Prather 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).

  • FLUE PIPE CONTROL
    Publication number: 20030127061
    Abstract: An improved flue pipe construction particularly adapted for a fuel fired water heater is disclosed which serves to reduce or minimize heat loss when the water heater is in a standby mode. The flue pipe construction comprises inner and outer concentric flue pipes which define an air space therebetween and one or more valve arrangements associated therewith to selectively restrict air flow through such air space. The valve arrangements include a thermally responsive actuator operative to open and close the valve member in response to heat generated by firing of the burner assembly without the need for any external power supply or interlocks.
    Type: Application
    Filed: January 9, 2002
    Publication date: July 10, 2003
    Inventors: Prasad S. Khadkikar, Richard L. Gerich, Christine M. Hudson, Jeffrey A. West, Derek J. Rose, Douglas J. Kempf, Douglas E. Prather, Richard E. Welch
  • Flue pipe control
    Patent number: 6584940
    Abstract: An improved flue pipe construction particularly adapted for a fuel fired water heater is disclosed which serves to reduce or minimize heat loss when the water heater is in a standby mode. The flue pipe construction comprises inner and outer concentric flue pipes which define an air space therebetween and one or more valve arrangements associated therewith to selectively restrict air flow through such air space. The valve arrangements include a thermally responsive actuator operative to open and close the valve member in response to heat generated by firing of the burner assembly without the need for any external power supply or interlocks.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: July 1, 2003
    Assignee: Therm-O-Disc, Incorporated
    Inventors: Prasad S. Khadkikar, Richard L. Gerich, Christine M. Hudson, Jeffrey A. West, Derek J. Rose, Douglas J. Kempf, Douglas E. Prather, Richard E. Welch
  • Loracarbef hydrochloride C1-C3 alcohol solvates and uses thereof
    Patent number: 5578720
    Abstract: This invention provides for crystalline hydrochloride C.sub.1 -C.sub.3 alcohol solvate forms of the compound of formula (I): ##STR1## In particular, crystalline hydrochloride ethanol, methanol, and propanol solvates are disclosed.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: November 26, 1996
    Assignee: Eli Lilly and Company
    Inventors: Jane G. Amos, Perry C. Heath, Douglas E. Prather, John E. Toth
  • Loracarbef hydrochloride C1-C3 alcohol solvates and uses thereof
    Patent number: 5550231
    Abstract: This invention provides for crystalline hydrochloride C.sub.1 -C.sub.3 alcohol solvate forms of the compound of formula (I): ##STR1## In particular, crystalline hydrochloride ethanol, methanol, and propanol solvates are disclosed. Also disclosed are processess for preparing and using the above compounds.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: August 27, 1996
    Assignee: Eli Lilly and Company
    Inventors: Jane G. Amos, Perry C. Heath, Douglas E. Prather, John E. Toth
  • Preparation of 3,4,4-trisubstituted-piperidinyl-N-alkylcarboxylates and intermediates
    Patent number: 5434171
    Abstract: This invention relates to a process for preparing certain 3,4,4-trisubstituted-piperidinyl-N-alkylcarboxylates, intermediates, and congeners. Finally, the invention provides new 3,4,4-trisubstituted-piperidinyl-N-alkylcarboxylates with formulations and methods for using the compounds.
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: July 18, 1995
    Assignee: Eli Lilly and Company
    Inventors: Scott A. Frank, Douglas E. Prather, Jeffrey A. Ward, John A. Werner