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).
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Patent number: 6207828Abstract: 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: GrantFiled: November 4, 1999Date of Patent: March 27, 2001Assignee: Rolm and Haas CompanyInventor: Peter Osei-Gyimah
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Patent number: 5910602Abstract: 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: GrantFiled: April 29, 1998Date of Patent: June 8, 1999Assignee: Rohm and Haas CompanyInventors: Joshua Anthony Chong, Fereydon Abdesken, Peter Osei-Gyimah
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Patent number: 5883134Abstract: 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: GrantFiled: August 21, 1996Date of Patent: March 16, 1999Assignee: Rohm and Haas CompanyInventors: Adam Chi-Tung Hsu, Peter Osei-Gyimah, Barry C. Lange, Rhoda W. Joseph
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Patent number: 5777154Abstract: 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: GrantFiled: November 14, 1996Date of Patent: July 7, 1998Assignee: Rohm and Haas CompanyInventors: Joshua Anthony Chong, Fereydon Abdesken, Peter Osei-Gyimah
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Patent number: 5688744Abstract: 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: GrantFiled: October 11, 1996Date of Patent: November 18, 1997Assignee: Rohm and Haas CompanyInventors: Rhoda Weber Joseph, Diane Lynn Antes, Peter Osei-Gyimah
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Patent number: 5508417Abstract: 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: GrantFiled: February 23, 1994Date of Patent: April 16, 1996Assignee: Rohm and Haas CompanyInventors: Peter Osei-Gyimah, Barry C. Lange
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Patent number: 5464832Abstract: 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: GrantFiled: December 13, 1993Date of Patent: November 7, 1995Assignee: Rohm and Haas CompanyInventors: Peter Osei-Gyimah, Samuel E. Sherba, Barry C. Lange, Rai J. Mehta, Rhoda W. Joseph
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Patent number: 5384326Abstract: 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: GrantFiled: November 12, 1991Date of Patent: January 24, 1995Assignee: Rohm and Haas CompanyInventors: Kevin F. Gironda, Peter Osei-Gyimah, Barry C. Lange
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Patent number: 5321141Abstract: 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: GrantFiled: October 28, 1993Date of Patent: June 14, 1994Assignee: Rohm and Haas CompanyInventors: Peter Osei-Gyimah, Barry C. Lange
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Patent number: 5302592Abstract: Use as microbicides of thioacryloyl compounds of the formula ##STR1## Compounds and compositions are also disclosed.Type: GrantFiled: August 16, 1993Date of Patent: April 12, 1994Assignee: Rohm and Haas CompanyInventors: Peter Osei-Gyimah, Samuel E. Sherba, Raj J. Mehta, Barry C. Lange, Rhoda W. Joseph
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Patent number: 5288693Abstract: 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: GrantFiled: June 25, 1993Date of Patent: February 22, 1994Assignee: Rohm and Haas CompanyInventors: Peter Osei-Gyimah, Barry C. Lange
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Patent number: 5091399Abstract: 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: GrantFiled: December 10, 1990Date of Patent: February 25, 1992Assignee: Rohm and Haas CompanyInventors: Peter Osei-Gyimah, Samuel E. Sherba
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Patent number: 4745134Abstract: 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: GrantFiled: June 27, 1984Date of Patent: May 17, 1988Assignee: Rohm and Haas Co.Inventor: Peter Osei-Gyimah
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Patent number: 4415455Abstract: 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: GrantFiled: November 9, 1982Date of Patent: November 15, 1983Assignee: Rohm and Haas CompanyInventors: Peter Osei-Gyimah, Peter G. Cartier, Paul E. Ellis