Patents Represented by Attorney Charles J. Knuth
  • Patent number: 4616026
    Abstract: Compounds of the formula ##STR1## a pharmaceutically or agriculturally acceptable acid addition salt thereof wherein R is 5-chloro-2-pyridyl, phenyl or phenyl substituted by from 1 to 3 substituents, each independently selected from F, Cl, Br, I, CF.sub.3, (C.sub.1 -C.sub.4)alkyl and (C.sub.1 -C.sub.4)alkoxy; and R.sup.1 is H, Cl, phenyl, phenyl substituted by from 1 to 3 substituents each independently selected from F, Cl, Br, I and CF.sub.3 or a heterocyclic group linked to the adjacent CF.sub.2 group by a ring carbon atom; method for their use in combatting fungal infections in plants, seeds and animals, including humans, and pharmaceutical and agricultural compositions containing them.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: October 7, 1986
    Assignee: Pfizer Inc.
    Inventors: Kenneth Richardson, Peter J. Whittle
  • Patent number: 4616027
    Abstract: Compounds of the general formula ##STR1## or a pharmaceutically or agriculturally acceptable acid addition salt thereof wherein R is 5-chloro-2-pyridyl, phenyl or phenyl substituted by from one to three substituents, each independently selected from F, Cl, Br, I, CF.sub.3, (C.sub.1 -C.sub.4)alkyl and (C.sub.1 -C.sub.4)alkoxy; and n is zero or an integer from 1 to 5; method for their use in combatting fungal infections in plants, seeds and animals, including humans; and pharmaceutical and agricultural compositions containing them.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: October 7, 1986
    Assignee: Pfizer Inc.
    Inventors: Kenneth Richardson, Peter J. Whittle
  • Patent number: 4616024
    Abstract: 1,4-Dihydropyridine derivatives of the formula: ##STR1## wherein R is aryl or heteroaryl: R.sup.1 and R.sup.2 are each independently C.sub.1 -C.sub.4 alkyl or 2-methoxyethyl; Y is --(CH.sub.2).sub.n --, --CH.sub.2 CH(CH.sub.3)-- or --CH.sub.2 C(CH.sub.3).sub.2 --; n is 1 to 3; and X is a 5 or 6 membered nitrogen containing aromatic heterocyclic ring which may optionally be substituted by one or more C.sub.1 -C.sub.4 alkyl, phenyl, benzyl, CN, --N(R.sup.3).sub.2, (CH.sub.2).sub.m CO.sub.2 H, (CH.sub.2).sub.m CO.sub.2 (C.sub.1 -C.sub.4 alkyl) or (CH.sub.2).sub.m CON(R.sup.3).sub.2 group wherein each R.sup.3 is independently H or C.sub.1 -C.sub.4 alkyl and m is 0 or 1; and their pharmaceutically acceptable acid addition salts, and pharmaceutical preparation containing such compounds, have utility as anti-ischaemic and antihypertensive agents.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: October 7, 1986
    Assignee: Pfizer Inc.
    Inventors: Simon F. Campbell, Peter E. Cross, John K. Stubbs
  • Patent number: 4614737
    Abstract: Certain 2-dioxacycloalkylthio-2-penem-3-carboxylic acid compounds are useful as antibacterials for treating mammals and have the formula ##STR1## or a pharmaceutically acceptable salt thereof, wherein: R is ##STR2## A is carbonyl, methylene or thiocarbonyl; B is alkylene having 2-5 carbon atoms;alk is alkylene having 1-6 carbon atoms;R.sub.1 is hydrogen or a group which results in an ester which is hydrolyzable in vivo; andn is zero or one.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: September 30, 1986
    Assignee: Pfizer Inc.
    Inventor: Ernest S. Hamanaka
  • Patent number: 4613516
    Abstract: The adherence of a bioactive glass coating to a metal substrate is improved by applying said glass to said substrate in admixture with at least one of cobaltic oxide, cobaltous oxide, nickel oxide or manganese oxide, and firing the coated substrate at at least about 730.degree. C.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: September 23, 1986
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Chhattar S. Kucheria, Rodney E. Wells
  • Patent number: 4613462
    Abstract: A series of novel derivatives of penicillanic acid 1,1-dioxide, having a disubstituted methyl group of the formula X-CH-Y at the 6-position, and the pharmaceutically-acceptable salts thereof and the pharmaceutically-acceptable esters thereof readily hydrolyzable in vivo, wherein X is hydroxy, acylated hydroxy or amino and Y is carboxy or esterified carboxy. The compounds of the invention are inhibitors of bacterial beta-lactamases, and they will protect certain beta-lactamase-susceptible beta-lactam antibiotics, e.g. ampicillin, against inactivation by beta-lactamases. Co-administration of a compound of the invention with a beta-lactam antibiotic such as ampicillin to a mammalian subject increases the effectiveness of the beta-lactam antibiotic against infections caused by beta-lactamase-producing bacteria.
    Type: Grant
    Filed: February 6, 1986
    Date of Patent: September 23, 1986
    Assignee: Pfizer, Inc.
    Inventor: Wayne E. Barth
  • Patent number: 4611588
    Abstract: A shielding material for use in such as endotracheal tubes during laser beam surgery comprising a dispersion of particulate graphite in a polymer matrix.
    Type: Grant
    Filed: June 5, 1985
    Date of Patent: September 16, 1986
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Joseph E. Laptewicz, Jr., Roland Bauer
  • Patent number: 4610982
    Abstract: Certain novel 2-acetoxybenzoyl and ring-substituted .alpha.-arylpropionyl derivatives of 4-hydroxy-2-methyl-N-(2-pyridinyl)-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide and several other closely-related known oxicams have been prepared. These particular compounds are useful in therapy as non-steroidal anti-arthritic agents. Typical member compounds include 4-(2-acetoxybenzoyloxy)-2-methyl-N-(2-pyridinyl)-2H-1,2-benzothiazine-3-ca rboxamide 1,1-dioxide, 4-[.alpha.-(4-isobutylphenyl)propionyloxy]-2-methyl-N-(2-pyridinyl)-2H-1,2 -benzothiazine-3-carboxyamide N-(2-pyridinyl)-2H-1,2-benzothiazine-3-carboxyamide 1,1-dioxide, 4-[.alpha.-(3-benzoylphenyl)propionyloxy]-2-methyl-N-(2-pyridinyl)-2H-1,2- benzothiazine-3-carboxamide 1,1-dioxide, "d-4-[.alpha.-6-methoxynaphth-2-yl)propionyloxy]-2-methyl-N-(2-pyridinyl)- 2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide" to -- d-4-[.alpha.-(6-methoxynaphth-2-yl)propionyloxy]-2-methyl-N-(2-pyridinyl)- 2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide.
    Type: Grant
    Filed: June 3, 1985
    Date of Patent: September 9, 1986
    Assignee: Pfizer Inc.
    Inventor: Joseph G. Lombardino
  • Patent number: 4610688
    Abstract: A novel prosthesis for use in repairing or replacing soft tissue is disclosed, which comprises a triaxially-braided fabric element having interwoven first, second and third sets of fibers, with the fibers of the second and third sets being oriented at substantially the same acute braiding angle with respect to the fibers of the first set. An elongated ligament prosthesis exhibiting the desired properties of high strength and high elasticity may be prepared by selecting high elasticity fibers for the first set, orienting said first set of fibers in the longitudinal direction of the prosthesis and selecting fibers having high yield strength and high Young's modulus for the second and third sets. A tubular prosthesis in which high elasticity fibers are oriented in the longitudinal direction is highly suitable for use as a vascular prosthesis. A prosthesis of the invention may also be manufactured in the form of a prosthetic heart valve leaflet.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: September 9, 1986
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Thomas A. Silvestrini, Joseph E. Laptewicz, Jr.
  • Patent number: 4607453
    Abstract: Novel F1 hybrid corn plants DK 672, novel seeds of the hybrid, seeds produced by cultivation of the hybrid, cells which upon growth and differentiation produce the novel hybrid and a method to produce the novel hybrid are disclosed.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: August 26, 1986
    Assignee: DeKalb-Pfizer Genetics
    Inventor: A. Forrest Troyer
  • Patent number: 4605624
    Abstract: A new antibiotic substance, which has been named nargenicin C.sub.1, has been isolated from fermentations of a species of the genus Nocardia. Nargenicin C.sub.1 can be used as an antibacterial agent against susceptible bacteria, especially susceptible strains of Staphylococcus aureus.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: August 12, 1986
    Assignee: Pfizer Inc.
    Inventors: Walter D. Celmer, Walter P. Cullen, Riichiro Shibakawa, Junsuke Tone
  • Patent number: 4603538
    Abstract: A method of preparing a sterile double package by inserting a sterile article into an inner package which has been sealed on three sides, inserting the inner package into an outer package which has three sides sealed, sealing the remaining side of the outer package to form a double package, sterilizing the contents of the outer package, and sealing the fourth side of the inner package through the outer package.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: August 5, 1986
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventor: William H. Shave
  • Patent number: 4602016
    Abstract: N-(mono or disubstituted phenoxyalkyl)imidazoles and the pharmaceutically acceptable acid addition salts thereof are able to selectively inhibit the action of the thromboxane synthetase enzyme without significantly inhibiting the action of the prostacycline synthetase or cyclooxygenase enzymes and are thus useful in the treatment of ischaemic heart disease, stroke, transient ischaemic attack, thrombosis, migraine, and the vascular complications of diabetes.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: July 22, 1986
    Assignee: Pfizer Inc.
    Inventors: Peter E. Cross, Roger P. Dickinson
  • Patent number: 4602067
    Abstract: An aqueous drilling fluid suitable for high-temperature use comprising a water base, clay suspended in said base and from about 0.01-25 pounds per barrel total composition of a hydrolyzed terpolymer of maleic anhydride, styrene and a third monomer selected from acrylamide, methacrylamide, acrylic acid or methacrylic acid, the molar ratio of maleic anhydride to styrene to said third monomer being from about 30:10:60 to 50:40:10, and the alkali metal, ammonium and lower aliphatic amine salts thereof, the weight-average molecular weight of said hydrolyzed terpolymer being from about 500-10,000. An improved drilling process wherein such fluids remain flowable at elevated temperatures is also disclosed.
    Type: Grant
    Filed: March 28, 1985
    Date of Patent: July 22, 1986
    Assignee: Pfizer Inc.
    Inventors: Randel E. Stong, Stanley W. Walinsky
  • Patent number: 4601897
    Abstract: A method for relaxing bronchial tissue in mammals, including humans, by use of a combination of prazosin and pirbuterol or their pharmaceutically acceptable acid addition salts.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: July 22, 1986
    Assignee: Pfizer Inc.
    Inventor: Craig A. P. D. Saxton
  • Patent number: 4601893
    Abstract: Laminate device for the controlled and prolonged release of at least one active agent to an ambient environment comprising at least one core sheet, said core sheet or sheets comprising said agent or agents in a polymer matrix, and, in a preferred embodiment, a porosity enhancing agent in admixture with said agent; said core sheet or sheets being alternately sandwiched or interposed between coextensive inert polymeric films substantially impermeable to said environment and to said agent or agents, said device being perforated by one or a plurality of macroholes extending through said sheets and said films. In a modification of said device the perimeter edge thereof is coated by an inert polymeric film substantially impermeable to said environment and to said agent or agents. Also included are methods for making such a device.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: July 22, 1986
    Assignee: Pfizer Inc.
    Inventor: John R. Cardinal
  • Patent number: 4599198
    Abstract: Bis(t-butoxycarbonyl) derivatives of phenylalanylhistidine as intermediates in the synthesis of rennin inhibiting polypeptides.
    Type: Grant
    Filed: September 26, 1985
    Date of Patent: July 8, 1986
    Assignee: Pfizer Inc.
    Inventor: Dennis J. Hoover
  • Patent number: 4598859
    Abstract: Gases entrapped in a metal assembly are exhausted through a vent closed off by a metal or metal alloy which has a melting point below the temperature at which said assembly is hot rolled. The metal assembly is designed to bond dissimilar metals on hot rolling.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: July 8, 1986
    Assignee: Pfizer Inc.
    Inventors: Peter Cajthaml, Jr., James R. Hunter
  • Patent number: 4595539
    Abstract: Certain 2-substituted-2-penem-3-carboxylic acid compounds and pharmaceutically-acceptable salts thereof can be prepared from the appropriate xanthate or trithiocarbonate by desulfurization and addition of an electrophilic sulfur compound followed by halogenation and ring closure. The corresponding desulfurized and halogenated olefinic intermediates are disclosed.
    Type: Grant
    Filed: June 10, 1983
    Date of Patent: June 17, 1986
    Assignee: Pfizer Inc.
    Inventor: Ernest S. Hamanaka
  • Patent number: D284889
    Type: Grant
    Filed: October 19, 1983
    Date of Patent: July 29, 1986
    Assignee: Howmedica, Inc.
    Inventor: Robert V. Kenna