Patents by Inventor Peter Osei-Gyimah

Peter Osei-Gyimah 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: 6207828
    Abstract: This invention provides a convenient, new, one step process for the preparation of 2-(trihaloacetyl)-3-(substituted amino)-2-propenoates and related derivatives thereof by reaction of carbonyl compounds substituted with a trihaloacetyl group with an acetal in the presence of an organic acid. The resulting propenoates are useful as intermediates for the construction of trihalomethyl substituted heterocyclic compounds for use in pharmaceutical and agricultural applications.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: March 27, 2001
    Assignee: Rolm and Haas Company
    Inventor: Peter Osei-Gyimah
  • Patent number: 5910602
    Abstract: The present invention relates to methods for preparing 3-amino-4,4,4-trihalocrotonates and their derivatives from a 4,4,4-trihaloacetoacetate derivative and an amine or ammonium salt.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: June 8, 1999
    Assignee: Rohm and Haas Company
    Inventors: Joshua Anthony Chong, Fereydon Abdesken, Peter Osei-Gyimah
  • Patent number: 5883134
    Abstract: Disclosed is a method of controlling or inhibiting the growth of microorganisms comprising introducing in, at, or on a locus an antimicrobially effective amount of an antimicrobially active nitroethene compound.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: March 16, 1999
    Assignee: Rohm and Haas Company
    Inventors: Adam Chi-Tung Hsu, Peter Osei-Gyimah, Barry C. Lange, Rhoda W. Joseph
  • Patent number: 5777154
    Abstract: The present invention relates to methods for preparing 3-amino-4,4,4-trihalocrotonates and their derivatives from a 4,4,4-trihaloacetoacetate derivative and an amine or ammonium salt.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: July 7, 1998
    Assignee: Rohm and Haas Company
    Inventors: Joshua Anthony Chong, Fereydon Abdesken, Peter Osei-Gyimah
  • Patent number: 5688744
    Abstract: A method of inhibiting the growth of bacteria and algae in industrial loci using a compound of formula I or II: ##STR1## is disclosed. Antimicrobial compounds useful in inhibiting the growth of bacteria and algae in industrial loci and compositions containing the antimicrobial compounds are also disclosed.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: November 18, 1997
    Assignee: Rohm and Haas Company
    Inventors: Rhoda Weber Joseph, Diane Lynn Antes, Peter Osei-Gyimah
  • Patent number: 5508417
    Abstract: This invention relates to antimicrobial compounds of formula I, II, or III ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from hydrogen, halogen, or (C.sub.1 -C.sub.4)alkyl;R.sub.1 and R.sub.2 may be taken together with the carbons to which they are attached to form a 5 to 7-membered carbocyclic ring and the ring may be aromatic;R.sub.3 is hydrogen, (C.sub.1 -C.sub.8)alkyl, (C.sub.2 -C.sub.8)alkenyl, (C.sub.5 -C.sub.8)alkynyl, (C.sub.5 -C.sub.7)cycloalkyl or cycloalkenyl, phenyl or substituted phenyl, (C.sub.7 -C.sub.10)aralkyl or substituted (C.sub.7 -C.sub.10)aralkyl, or a 5 to 8-membered heteroaryl having one or more heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen;R.sub.4 is an electron-withdrawing group selected from CN, NO.sub.2, P(O)(OR.sub.7).sub.2, P(S)(OR.sub.7).sub.2, COOR.sub.6, COR.sub.6, CONHR.sub.6, SOR.sub.6, SO.sub.2 R.sub.6, where R.sub.6 is hydrogen, (C.sub.1 -C.sub.8)alkyl, phenyl or substituted phenyl, (C.sub.7 -C.sub.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: April 16, 1996
    Assignee: Rohm and Haas Company
    Inventors: Peter Osei-Gyimah, Barry C. Lange
  • Patent number: 5464832
    Abstract: A thioacryloyl compound of the formula ##STR1## wherein Z is selected from the group consisting of OR, R and NR.sup.1 R.sup.2 ;R is selected from the group consisting of hydrogen; (C.sub.1 -C.sub.18)alkyl; (C.sub.1 -C.sub.8)alkenyl; (C.sub.1 -C.sub.8)haloalkynyl; 2-(5-chlorothienyl)methyl; phenyl optionally substituted with one or more substituents selected from the group consisting of halo-, (C.sub.1 -C.sub.3)alkoxy-, nitro-, and (C.sub.1 -C.sub.3)alkyl; phenacyl optionally substituted with one or more substituents selected from the group consisting of ring halo-, (C.sub.1 -C.sub.3)alkoxy-, nitro-, and (C.sub.1 -C.sub.3)alkyl; arylalkyl optionally substituted with one or more substituents selected from the group consisting of ring halo-, (C.sub.1 -C.sub.3)alkoxy-, nitro-, and (C.sub.1 -C.sub.3)alkyl;R.sup.1 and R.sup.2 are independently selected from (C.sub.1 -C.sub.8)alkyl and phenyl, or R.sup.1 and R.sup.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: November 7, 1995
    Assignee: Rohm and Haas Company
    Inventors: Peter Osei-Gyimah, Samuel E. Sherba, Barry C. Lange, Rai J. Mehta, Rhoda W. Joseph
  • Patent number: 5384326
    Abstract: Girondalones of the formula I useful as microbicides ##STR1## wherein A is a residue of a dialdehyde;R.sub.1 is independently selected from the group consisting of R.sub.2 and (C.sub.1 -C.sub.18)alkyl and;R.sub.2 is ##STR2## wherein (i) X.sub.1 and X.sub.2 can be joined to form a 5 or 6 membered fused carbocyclic ring, said ring being saturated, unsaturated, or aromatic; or(ii) X.sub.1 =Cl, H, methyl, or Br; andX.sub.2 =H, Cl, or Br.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: January 24, 1995
    Assignee: Rohm and Haas Company
    Inventors: Kevin F. Gironda, Peter Osei-Gyimah, Barry C. Lange
  • Patent number: 5321141
    Abstract: Antimicrobial compounds of the formula ##STR1## wherein R is hydrogen, halogen, or (C.sub.1 -C.sub.4)alkyl group;R.sub.1 is hydrogen or halogen; alternatively, R and R1 may be taken together with the carbons to which they are attached to form a 5- to 7-membered carbocyclic ring, said ring optionally being aromatic;R.sub.2 is hydrogen or (C.sub.1 -C.sub.3)alkyl group; andR3 is hydrogen, substituted or unsubstituted (C.sub.1 -C.sub.18)alkyl, substituted or unsubstituted (C.sub.2 -C.sub.18)alkenyl, substituted or unsubstituted (C.sub.2 -C.sub.18)alkynyl, substituted or unsubstituted (C.sub.4 -C.sub.8)cycloalkyl or cycloalkenyl, substituted or unsubstituted (C.sub.6 -C.sub.10)aryl or arylalkyl group are disclosed.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: June 14, 1994
    Assignee: Rohm and Haas Company
    Inventors: Peter Osei-Gyimah, Barry C. Lange
  • Patent number: 5302592
    Abstract: Use as microbicides of thioacryloyl compounds of the formula ##STR1## Compounds and compositions are also disclosed.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: April 12, 1994
    Assignee: Rohm and Haas Company
    Inventors: Peter Osei-Gyimah, Samuel E. Sherba, Raj J. Mehta, Barry C. Lange, Rhoda W. Joseph
  • Patent number: 5288693
    Abstract: Antimicrobial compounds of the formula ##STR1## wherein R is hydrogen, halogen or (C.sub.1 -C.sub.4)alkyl group;R.sub.1 is hydrogen or halogen; alternatively, R and R1 may be taken together with the carbons to which they are attached to form a 5- to 7-membered carbocyclic ring, said ring optionally being aromatic;R.sub.2 is hydrogen or (C.sub.1 -C.sub.3)alkyl group; andR3 is hydrogen, substituted or unsubstituted (C.sub.1 -C.sub.18)alkyl, substituted or unsubstituted (C.sub.2 -C.sub.18)alkenyl, substituted or unsubstituted (C.sub.2 -C.sub.18)alkynyl, substituted or unsubstituted (C.sub.4 -C.sub.8)cycloalkyl or cycloalkenyl, substituted or unsubstituted (C.sub.6 -C.sub.10)aryl or arylalkyl group are disclosed.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: February 22, 1994
    Assignee: Rohm and Haas Company
    Inventors: Peter Osei-Gyimah, Barry C. Lange
  • Patent number: 5091399
    Abstract: Compound having antimicrobial activity having the formula ##STR1## wherein R is (C.sub.1 -C.sub.18)alkyl, (C.sub.3 -C.sub.8)cycloalkyl, (C.sub.6 -C.sub.18)aryl, (C.sub.7 -C.sub.18)aralkyl, or (C.sub.7 -C.sub.18)alkaryl,provided that aryl or the aryl portion of said aralkyl or alkaryl are optionally substituted with halo or methyl; andR.sub.1 is H, Cl or methyland method for inhibiting growth of microorganisms using said compound.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: February 25, 1992
    Assignee: Rohm and Haas Company
    Inventors: Peter Osei-Gyimah, Samuel E. Sherba
  • Patent number: 4745134
    Abstract: Improved, inert separator beads for separating cation exchange resins from anion exchange resins during regeneration of mixed-bed exchange resins have been discovered. These beads are crosslinked copolymers of methyl methacrylate, styrene and a hydrophilic monomer containing an amide functionality, and have little tendency to clump together or clump at an air-water interface.
    Type: Grant
    Filed: June 27, 1984
    Date of Patent: May 17, 1988
    Assignee: Rohm and Haas Co.
    Inventor: Peter Osei-Gyimah
  • Patent number: 4415455
    Abstract: Good salt rejection, flux characteristics and resistance to degradation are obtained with semi-permeable reverse osmosis membranes made by coating a microporous substrate with a copolymer of a hydroxy containing methacrylic ester and methacrylic acid, and cross-linking the copolymer subsequent to deposition on the substrate.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: November 15, 1983
    Assignee: Rohm and Haas Company
    Inventors: Peter Osei-Gyimah, Peter G. Cartier, Paul E. Ellis