Patents by Inventor Viacheslav Alexandrovich Petrov

Viacheslav Alexandrovich Petrov 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: 6486280
    Abstract: Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: November 26, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Colin Anolick, Viacheslav Alexandrovich Petrov, Bruce Edmund Smart, Charles Winfield Stewart, Robert Clayton Wheland, William Brown Farnham, Andrew Edward Feiring, Weiming Qiu
  • Publication number: 20020137946
    Abstract: This invention is directed to compounds and intermediates of Formulae (6 and 3), useful in preparing herbicidal sulfonamides of Formula (1), including all geometric and stereoisomers thereof, and agricultural salts thereof, wherein X is H, F or Cl; Y is F or Cl; R1 is C1-C3 haloalkyl, C2-C4 alkoxyalkyl; C2-C6 haloalkoxyalkyl or C2-C6 cyanoalkyl; R2 is H, C1-C4 alkyl, C1-C4 haloalkyl; C3-C4 alkenyl, C3-C4 alkynyl, C2-C4 alkoxyalkyl, C2-C4 alkylcarbonyl or C2-C4 alkoxycarbonyl; R3 is H or OH; R4 is H, F or Cl; and R5 is F or Cl; provided that when R3 is H then R4 is F or Cl and when R3 is OH then R4 is H.
    Type: Application
    Filed: January 4, 2002
    Publication date: September 26, 2002
    Applicant: DEGUSSA AG
    Inventors: Eric Deguyon Taylor, Viacheslav Alexandrovich Petrov, Matthias Schaeffer, Karlheinz Drauz, Anne Vogt, Christoph Weckbecker, Steven H. Swearingen, Balreddy Kamireddy
  • Patent number: 6384234
    Abstract: This invention is directed to compounds and intermediates of Formulae 6 and 3, useful in preparing herbicidal sulfonamides of Formula 1, including all geometric and stereoisomers thereof, and agricultural salts thereof. wherein the substituents are defined in the specification.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: May 7, 2002
    Assignee: Degussa AG
    Inventors: Eric Deguyon Taylor, Viacheslav Alexandrovich Petrov, Matthias Schaeffer, Karlheinz Drauz, Anne Vogt, Christoph Weckbecker, Steven Swearingen, Balreddy Kamireddy
  • Patent number: 6291730
    Abstract: A liquid phase process is disclosed for producing halogenated alkane adducts of the formula: CAR1R2CBR3R4 (where A, B, R1, R2, R3, and R4 are as defined in the specification) which involves contacting a corresponding halogenated alkane, AB, with a corresponding olefin, CR1R2═C3R4 in a dinitrile or cyclic carbonate ester solvent which divides the reaction mixture into two liquid phases and in the presence of a catalyst system containing: (i) at least one catalyst selected from monovalent and divalent copper; and optionally (ii) a promoter selected from aromatic or aliphatic heterocyclic compounds which contain at least one carbon-nitrogen double bond in the heterocyclic ring. When hydrochlorofluorocarbons are formed, the chlorine content may be reduced by reacting the hydrochlorofluorocarbons with HF. New compounds disclosed include CF3CF2CCl2CH2CCl3, CF3CCl2CH2CH2Cl and CF3CCl2CH2CHClF. These compounds are useful as intermediates for producing hydrofluorocarbons.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: September 18, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ralph Thomas Baker, Viacheslav Alexandrovich Petrov, Velliyur Nott Mallikarjuna Rao, Allen Capron Sievert
  • Patent number: 6262320
    Abstract: A process for the Lewis acid catalyzed addition of trifluoromethanes across the carbon-carbon double bond of fluoroolefins is disclosed. A process for isomerization of monohaloperfluoro alkanes is also disclosed.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: July 17, 2001
    Assignee: E. I. duPont de Nemours and Company
    Inventors: Carl George Krespan, Viacheslav Alexandrovich Petrov
  • Patent number: 6248823
    Abstract: Disclosed is a liquid/gelatinous composition of matter comprising: (a) a solvent or a mixture of solvents selected from the group consisting of: (i) a CnF2n+2−xHx compound, wherein n is an integer from 6 to 15 and x is an integer from 1 to 3; and (ii) a Cn′F2n′−x′Hx′ compound, wherein n′ is an integer from 7 to 15 and x′ is an integer from 1 to 3; and (b) one or more amorphous fluoropolymers selected from the group consisting of: (i) poly(HFP/TFE); (ii) iodine ended poly(TFE/PMVE); (iii) poly(TFE/PMVE/PEVE); (iv) poly(TFE/PDD); (v) poly(TFE/perfluorovinylether); (vi) poly(CF2═CF(CF2)2OCF═CF2/TFE); and wherein the amorphous fluoropolymer has no detectable Tm (<1 J/g) by differential scanning calorimetry and wherein the amorphous fluoropolymer makes up 0.05 to 30 wt % of the composition and wherein at least 5% of the amorphous fluoropolymer present is in solution in the solvent or mixture of solvents.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: June 19, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jeffrey A. Hrivnak, Walter Mahler, William George O'Brien, Viacheslav Alexandrovich Petrov, Robert Clayton Wheland
  • Patent number: 6156943
    Abstract: Processes are disclosed for producing hydrohaloolefins having the formula CF.sub.2 .dbd.C(CH.sub.2 RF)CF.sub.3, the formula FRCF.dbd.C(CH.sub.2 RF)CF.sub.3 or the formula FRCF.dbd.C(CH.sub.2 RF)(CF.sub.2 RF) wherein each R is a difinctional group of the formula --C.sub.2 F.sub.2 XY-- where X and Y are attached to the same carbon, each X is H, Br, Cl or F and each Y is F or CF.sub.3. The processes involve reacting (CF.sub.3).sub.2 C.dbd.CH.sub.2 or certain olefinic adducts thereof with a second olefm of the formula CF.sub.2 .dbd.CXY in the liquid phase in the presence of a Lewis acid catalyst selected from the group consisting of antimony pentafluoride and aluminum chlorofluoride.Also disclosed is 1,1,2,2,-tetrafluoro-3,3-bistrifluoromethylcyclobutane and a process for its production which involves reacting (CF.sub.3).sub.2 C.dbd.CH.sub.2 with CF.sub.2 .dbd.CF.sub.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: December 5, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Viacheslav Alexandrovich Petrov
  • Patent number: 6133389
    Abstract: Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: October 17, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Colin Anolick, Viacheslav Alexandrovich Petrov, Bruce Edmund Smart, Charles Winfield Stewart, Robert Clayton Wheland, William Brown Farnham, Andrew Edward Feiring, Weiming Qiu
  • Patent number: 6040487
    Abstract: A liquid phase process is disclosed for producing halogenated alkane adducts of the formula: CAR.sup.1 R.sup.2 CBR.sup.3 R.sup.4 (where, A, B, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are defined in the specification) which involves contacting a corresponding halogenated alkane, AB, with a corresponding olefin, CR.sup.1 R.sup.2 .dbd.CR.sup.3 R.sup.4, in the presence of a catalyst system containing (i) at least one catalyst selected from monovalent and divalent copper, and (ii) a promoter selected from aromatic or aliphatic hetercyclic compounds which contain at least one carbon-nitrogen double bond in the heterocyclic ring. When hydrochlorofluorocarbons are formed, hydrofluorocarbons may be formed therefrom by reacting the hydrochlorofluorocarbons with HF.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: March 21, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ralph Thomas Baker, Viacheslav Alexandrovich Petrov, Velliyurnott Mallikarjuna Rao
  • Patent number: 6025521
    Abstract: This invention relates to carbon based initiators for polymerization and telomerization reactions. Polymers produced are useful as water repellants and materials with high temperature resistance. Telomers are useful as intermediates in the production of chemically inert and temperature resistant materials.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: February 15, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Carl George Krespan, Viacheslav Alexandrovich Petrov
  • Patent number: 5994599
    Abstract: A process is disclosed for preparing an adduct of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m R.sup.2.sub.a wherein R.sup.1 is selected from the group consisting of --(CF.sub.2).sub.p H and --C.sub.p F.sub.2p+1 where p is 0 or an integer from 1 to 6; R.sup.2 is selected from the group consisting of --H, --CHF.sub.2, --CHFCF.sub.3, --CHFOCF.sub.3, --CHFO(CF.sub.2).sub.2 CF.sub.3, and --CHClF; each X is independently selected from the group consisting of Br, Cl and F; a is 0 or 1; m is 1 or 2, provided that when a is 1 and R.sup.2 is other than hydrogen, then m is 1; and n is 0, 1 or 2. The process involves reacting a fluorinated ether of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a R.sup.2.sub.a with an olefin of the formula C.sub.2 H.sub.n X.sub.4-n in the liquid phase in the presence of antimony pentafluoride catalyst. Also disclosed is a process for preparing unsaturated ethers of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: November 30, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Viacheslav Alexandrovich Petrov
  • Patent number: 5929293
    Abstract: The invention concerns processes for the preparation of fluoroolefins, including a process for the deiodofluorination of an iodine containing fluorocarbon comprising contacting said iodine containing fluorocarbon with a fluoroolefin in the presence of an aluminum chlorofluoride catalyst.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: July 27, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Carl George Krespan, Viacheslav Alexandrovich Petrov