Patents by Inventor David Walter Piotrowski

David Walter Piotrowski 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: 20220184041
    Abstract: This application includes a compound of Formula I or a pharmaceutically acceptable salt thereof; wherein the variables R1a, R1b, R2, R3, X, Y and Z are as defined herein, pharmaceutical compositions comprising the compounds of Formula I and methods of treatment comprising administering to a patient in need thereof a compound of Formula I for the treatment of transthyretin amyloidosis and diseases related thereto.
    Type: Application
    Filed: November 23, 2021
    Publication date: June 16, 2022
    Applicant: Pfizer Inc.
    Inventors: Shawn Cabral, Daniel Paul Canterbury, Robert Lee Dow, Andrew Fensome, Magdalena Korczynska, Sophie Yvette Lavergne, Allyn Timothy Londregan, Vincent Mascitti, David Walter Piotrowski, Andre Shavnya, Meihua Mike Tu, Tao Wang, Hanna Maria Wisniewska
  • Patent number: 11014908
    Abstract: The invention relates to pyrazole derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes. More particularly the invention relates to HbS modulators of formula (I) or tautomers thereof, or pharmaceutically acceptable salts of said modulators or tautomers thereof, wherein X, Y, R2 and R3 are as defined in the description. HbS modulators are potentially useful in the treatment of a wide range of disorders, including sickle cell disease (SCD).
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: May 25, 2021
    Assignee: Pfizer Inc.
    Inventors: Ariamala Gopalsamy, Arjun Venkat Narayanan, Agustin Casimiro-Garcia, Chulho Choi, David Hepworth, David Walter Piotrowski, Hatice Gizem Yayla, Jayasankar Jasti, Lee Richard Roberts, Lyn Howard Jones, Mihir Dineshkumar Parikh, Ming Zhu Chen, Olugbeminiyi Omezia Fadeyi, Ralph Pelton Robinson, Jr., Robert Lee Dow, Shawn Cabral
  • Publication number: 20200172512
    Abstract: The invention relates to pyrazole derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes. More particularly the invention relates to HbS modulators of formula (I) or tautomers thereof, or pharmaceutically acceptable salts of said modulators or tautomers thereof, wherein X, Y, R2 and R3 are as defined in the description. HbS modulators are potentially useful in the treatment of a wide range of disorders, including sickle cell disease (SCD).
    Type: Application
    Filed: November 26, 2019
    Publication date: June 4, 2020
    Applicant: Pfizer Inc.
    Inventors: Ariamala Gopalsamy, Arjun Venkat Narayanan, Agustin Casimiro-Garcia, Chulho Choi, David Hepworth, David Walter Piotrowski, Hatice Gizem Yayla, Jayasankar Jasti, Lee Richard Roberts, Lyn Howard Jones, Mihir Dineshkumar Parikh, Ming Zhu Chen, Olugbeminiyi Omezia Fadeyi, Ralph Pelton Robinson, JR., Robert Lee Dow, Shawn Cabral
  • Publication number: 20120022058
    Abstract: Mineralocorticoid receptor antagonists (MRa), pharmaceutical compositions containing such inhibitors and the use of such inhibitors to treat, for example, diabetic nephropathy and hypertension in mammals, including humans.
    Type: Application
    Filed: March 26, 2010
    Publication date: January 26, 2012
    Inventors: Graciela Barbieri Arhancet, Agustin Casimiro-Garcia, Xiangyang Chen, David Hepworth, Marvin Jay Meyers, David Walter Piotrowski, Raj Kumar Raheja
  • Publication number: 20080132551
    Abstract: The invention provides compounds of Formula I: wherein A, B, and X are described herein. These compounds may be in the form of pharmaceutical salts or compositions, may be in pure enantiomeric form or racemic mixtures, and are useful in pharmaceuticals used to treat diseases or conditions in which ?7 nAChR is known to be involved.
    Type: Application
    Filed: March 24, 2004
    Publication date: June 5, 2008
    Inventors: Bruce Nelsen Rogers, David Walter Piotrowski, Brandon J. Margolis, Jason K. Myers, Vincent Edward Groppi, Daniel G. Rudmann
  • Patent number: 7074742
    Abstract: Compounds of Formula (I), their N-oxides and agriculturally suitable salts are disclosed which are useful as fungicides formula (I), (II) wherein A is a substituted pyridinyl ring; B is a substituted pyridinyl ring; W is C=L or SOn is O or S; R1 and R2 are each independently H; or C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl or C3-C6 cycloalkyl, each optionally substituted; R3 is H; or C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl or C3-C6 cycloalkyl, C2-C6 alkylcarbonyl, C2-C6 alkoxycarbonyl, C2-C6 alkylaminocarbonyl or C3-C8 dialkylaminocarbonyl; R4 is C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl or C3-C6 cycloalkyl, each optionally substituted; X is O or S; and n is 1 or 2; provided that when W is C?O and R1, R2 and R3 are H; then B is other than 4-trifluoromethyl-3-pyridinyl, 2-chloro-4-pyridinyl and 2,6-dihalo-4-pyridinyl.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: July 11, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Timothy Donald Neubert, David Walter Piotrowski, Michael Paul Walker
  • Patent number: 6818641
    Abstract: Compounds of Formula (I), and their N-oxides and agriculturally suitable salts, are disclosed which are useful as arthropodicides wherein A is H; E is H or C1-C3 alkyl; or A and E can be taken together to form —CH2—, —CH2CH2—, —O—, —S—, —S(O)—, —S(O)2—, —NR8—, —OCH2—, —SCH2—, —N(R8)CH2—, substituted —CH2— and substituted —CH2CH2—, the substituents independently selected from 1-2 halogen and 1-2 methyl; W is N or CR4; X is CR5R6, O, S, NR7 or a direct bond, provided that when W is N, then X is other than a direct bond; Y is H, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C1-C3 alkylsulfonyl, C3-C6 cycloalkyl, C3-C6 cycloalkylalkyl, NR9R10, N═CR11R12, OR7, COR13, CO2R14 or C1-C6 alkyl substituted by at least one group selected from halogen, C1-C3 alkoxy, CN, NO2, S(O)rR15, COR13, CO2R14 and optionally substituted phenyl; Z is O or S; and R2, R3, R4, R5, R6, R7, R8, R
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: November 16, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: David Walter Piotrowski
  • Publication number: 20040044040
    Abstract: Compounds of Formula (I), their N-oxides and agriculturally suitable salts are disclosed which are useful as fungicides formula (I), (II) wherein A is a substituted pyridinyl ring; B is a substituted pyridinyl ring; W is C═L or SOn is O or S; R1 and R2 are each independently H; or C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl or C3-C6 cycloalkyl, each optionally substituted; R3 is H; or C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl or C3-C6 cycloalkyl, C2-C6 alkylcarbonyl, C2-C6 alkoxycarbonyl, C2-C6 alkylaminocarbonyl or C3-C8 dialkylaminocarbonyl; R4 is C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl or C3-C6 cycloalkyl, each optionally substituted; X is O or S; and n is 1 or 2; provided that when W is C═O and R1, R2 and R3 are H; then B is other than 4-trifluoromethyl-3-pyridinyl, 2-chloro-4-pyridinyl and 2,6-dihalo-4-pyridinyl.
    Type: Application
    Filed: March 12, 2003
    Publication date: March 4, 2004
    Inventors: Timothy Donald Neubert, David Walter Piotrowski, Michael Paul Walker
  • Publication number: 20030139397
    Abstract: Compounds of Formula (I), and their N-oxides and agriculturally suitable salts, are disclosed which are useful as arthropodicides wherein A is H; E is H or C1-C3 alkyl; or A and E can be taken together to form —CH2—, —CH2CH2—, —O—, —S—, —S(O)—, —S(O)2—, —NR8—, —OCH2—, —SCH2—, —N(R8)CH2—, substituted —CH2— and substituted —CH2CH2—, the substituents independently selected from 1-2 halogen and 1-2 methyl; W is N or CR4;X is CR5R6, O, S, NR7 or a direct bond, provided that when W is N, then X is other than a direct bond; Y is H, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C1-C3 alkylsulfonyl, C3-C6 cycloalkyl, C3-C6 cycloalkylalkyl, NR9R10, N═CR11R12, OR7, COR13, CO2R14 or C1-C6 alkyl substituted by at least one group selected from halogen, C1-C3 alkoxy, CN, NO2, S(O)1R15, COR13, CO2R14 and optionally substituted phenyl; Z is O or S; and R2, R3, R4, R5, R6, R7, R8, R9
    Type: Application
    Filed: August 28, 2002
    Publication date: July 24, 2003
    Inventor: David Walter Piotrowski