Patents Represented by Attorney Charles J. Knuth
  • Patent number: 4661507
    Abstract: Compounds of the general formula: ##STR1## wherein R is naphthyl, biphenylyl, phenyl or substituted phenyl; n is 0, 1 or 2; and R.sup.1 is H, C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.2-4 alkanoyl, or C.sub.1-2 alkyl substituted by C.sub.2-4 alkenyl with the provisos that when R.sup.1 is H or C.sub.2-4 alkanoyl, n is 0; and when n is 2, R.sup.1 is C.sub.1-3 alkyl; and their pharmaceutically acceptable salts are antifungal agents useful in combatting fungal infections in animals, including humans.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: April 28, 1987
    Assignee: Pfizer Inc.
    Inventors: Geoffrey E. Gymer, Kenneth Richardson
  • Patent number: 4661485
    Abstract: Dihydropyridine Anti-ischaemic agents of the formula ##STR1## and their salts where R is aryl, R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.4 alkyl or 2-methoxyethyl, Y is --(CH.sub.2).sub.n -- where n is 2, 3 or 4 and is optionally substituted by 1 or 2 methyl groups and R.sup.3 is pyrimidyl or di- or tetrahydropyrimidyl.
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: April 28, 1987
    Assignee: Pfizer Inc.
    Inventors: Simon F. Campbell, Peter E. Cross, John K. Stubbs, John E. Arrowsmith
  • Patent number: 4658037
    Abstract: Certain 2-oxindole-1-carboxamide compounds having an acyl substituent at the 3-position, and also on the carboxamide nitrogen atom, are inhibitors of the cyclooxygenase (CO) and lipoxygenase (LO) enzymes, and are useful as analgesic agents and anti-inflammatory agents in mammalian subjects. Certain 2-oxindole compounds unsubstituted at the 1-position but having an acyl substituent at C-3 of the formula ##STR1## and the base salts thereof, wherein X is hydrogen, 5-fluoro, 5-chloro or 5-trifluoromethyl; Y is hydrogen, 6-fluoro, 6-chloro or 6-trifluoromethyl; and R.sup.1 is benzyl, furyl, thienyl or thienylmethyl; provided that when X and Y are both hydrogen, R.sup.1 is not benzyl are useful as intermediates to the aforementioned analgesic and anti-inflammatory agents.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: April 14, 1987
    Assignee: Pfizer Inc.
    Inventor: Saul B. Kadin
  • Patent number: 4657014
    Abstract: A device for conveying high energy electromagnetic radiation from a laser source to an optical fiber which comprises a sleeve having a proximal end and a distal end and being adapted to enclose a liquid which is transparent to said radiation, the distal end of said sleeve being adapted to be attached to the input end of the optical fiber; and a focussing lens attached to the proximal end of said sleeve said liquid having a refractive index which substantially matches the refractive index of the lens and of the optical fiber. A process for removing an obstruction by laser surgery using said device is also disclosed.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: April 14, 1987
    Assignee: Shiley, Inc.
    Inventors: William Edelman, Hamid R. Naghieh, Dennis Constantinou
  • Patent number: 4656174
    Abstract: A series of novel 2-substituted 4-amino-6,7-dimethoxyquinoline derivatives have been prepared, including their pharmaceutically acceptable acid addition salts. These particular compounds are useful in therapy as highly potent antihypertensive agents. Preferred member compounds include 4-amino-2-[4-(2-furoyl)piperazine-1-yl]-6,7-dimethoxyquinoline, 4-amino-2-[4-(1,4-benzodioxan-2-carbonyl)piperazin-1-yl]-6,7-dimethoxyquin oline and 4-amino-6,7-dimethoxy-2-(6,7-dimethoxy-1,2,3,4-tetrahydroisoquinol-2-yl)qu inoline, respectively. Methods for preparing these compounds from known starting materials are provided.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: April 7, 1987
    Assignee: Pfizer Inc.
    Inventors: Simon F. Campbell, John D. Hardstone
  • Patent number: 4656169
    Abstract: Novel biologically-active tetracyclic spiro-hydantoin derivatives which are potent inhibitors of aldose reductase and useful in treating diabetic complications are disclosed. Pharmaceutical compositions containing the novel compounds and a method of treating chronic diabetic complications are also disclosed. A preferred compound is 9'-chloro-5',6'-dihydro-2'-phenyl-spiro[imidazolidine-5,7'-7'H-pyrido(1,2, 3-de)quinoxaline]2,3',4-trione.
    Type: Grant
    Filed: April 10, 1986
    Date of Patent: April 7, 1987
    Assignee: Pfizer Inc.
    Inventor: Rodney C. Schnur
  • Patent number: 4656265
    Abstract: Compounds of the formula ##STR1## or a pharmaceutically acceptable acid addition salt thereof wherein R is 2-pyridyl, 6-chloro-2-pyridyl, 6-methyl-2-pyridyl or 5-methylisoxazol-3-yl; useful as prodrug forms of the corresponding known oxicam antiinflammatory and analgesic agents, piroxicam, the corresponding 6-chloro-2-pyridyl and 6-methyl-2-pyridylcarboxamides, isoxicam and tenoxicam; methods for their use, pharmaceutical compositions containing them and a process for their preparation.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: April 7, 1987
    Assignee: Pfizer Inc.
    Inventors: Joseph G. Lombardino, Anthony Marfat
  • Patent number: 4654352
    Abstract: Compounds of the formula: ##STR1## and pharmaceutically-acceptable acid addition salts thereof, wherein R.sup.1 is at the 3 or 4 position and is phenyl or phenyl substituted by halo, (C.sub.1 -C.sub.4)alkoxy, or (C.sub.2 -C.sub.5)alkoxycarbonyl; R.sup.2 is at the 2 or 7 position and is a group of the formula X(CH.sub.2).sub.n NR.sup.3 R.sup.4 where X is --CH.dbd.CH-- or --(CH.sub.2).sub.2 --; n is 1, 2, 3 or 4; and each of R.sup.3 and R.sup.4 is hydrogen or (C.sub.1 -C.sub.4)alkyl, or R.sup.3 and R.sup.4 together with the nitrogen atom to which they are attached form a 1-pyrrolidinyl or piperidino group; Y is hydrogen, (C.sub.1 -C.sub.4)alkyl, (C.sub.1 -C.sub.4)alkoxy or (C.sub.2 -C.sub.5)-alkoxycarbonyl at the 4, 5, 6 or 7 position; and wherein R.sup.2 is at the 2-position, R.sup.1 is at the 3- or 4-position, or alternatively when R.sup.2 is at the 7-position, R.sup.1 is at the 3-position; are useful for the treatment of diarrhea in humans and animals.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: March 31, 1987
    Assignee: Pfizer Inc.
    Inventor: Stephen J. Ray
  • Patent number: 4653507
    Abstract: A differential thermal testing system comprising a first thermal conductive sensing plate whose temperature is maintained at a constant first temperature, and a second thermal conductive sensing plate whose temperature can be altered. The temperature differential between the first thermal conductive sensing plate and second thermal conductive sensing plate is detected.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: March 31, 1987
    Assignee: Pfizer Inc.
    Inventor: Charles Laudadio
  • Patent number: 4654466
    Abstract: This invention relates to an inbred line of corn having the designation 78010, seeds produced by plants of the inbred line 78010, cells which upon growth and differentiation produces the inbred line 78010, hybrid corn seed produced by crossing the inbred line 78010 with another corn line and a process for the production of hybrid corn seed using the inbred line 78010.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: March 31, 1987
    Assignee: Dekalb-Pfizer Genetics
    Inventor: Marvin F. Lindsey
  • Patent number: 4654353
    Abstract: Compounds of the formula: ##STR1## where R is an optionally substituted aryl or heteroaryl group;R.sup.1 and R.sup.2 are each independently C.sub.1 -C.sub.4 alkyl or 2-methoxyethyl; and Y is --(CH.sub.2).sub.n -- where n is 2, 3 or 4, --CH.sub.2 CH(CH.sub.3)-- or --Ch.sub.2 C(CH.sub.3).sub.2 --; and their pharmaceutically acceptable salts.The compounds have utility as anti-ischaemic and antihypertensive agents and as synthetic intermediates to other dihydropyridine calcium antagonists.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: March 31, 1987
    Assignee: Pfizer Inc.
    Inventors: David Alker, Simon F. Campbell, Peter E. Cross
  • Patent number: 4652658
    Abstract: Preparation of 2-oxindole-1-carboxamides by reaction of 2-oxindoles with chlorosulfonyl isocyanate to produce novel N-chlorosulfonyl-2-oxindole-1-carboxamides which are then hydrolyzed to 2-oxindole-1-carboxamides useful as intermediates for analgesic and antiinflammatory agents.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: March 24, 1987
    Assignee: Pfizer Inc.
    Inventor: Thomas C. Crawford
  • Patent number: 4652523
    Abstract: A new polyether antibiotic has been isolated from fermentations of a new microorganism of the genus Streptomyces. This new microorganism is designated as N478-13 and it has been named Streptomyces routienii Huange sp. nov., (ATCC 30446). The new antibiotic exhibits antibacterial activity against a variety of gram-positive bacteria; it can be used to control swine dysentery; and it promotes increased efficiency of feed utilization (i.e. promotes increased growth) in swine and ruminants.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: March 24, 1987
    Assignee: Pfizer Inc.
    Inventors: Walter D. Celmer, Walter P. Cullen, Hiroshi Maeda, Junsuke Tone
  • Patent number: 4650491
    Abstract: A socket insert component of an acetabular cup prosthesis is held securely within its support shell by a locking mechanism comprising a circumferential groove in the shell concavity perpendicular to the longitudinal axis of the concavity, a first circumferential rib on the outer surface of the insert congruent with the groove, and a second circumferential rib on the outer surface of the insert parallel to and proximate the first rib, the first rib snapping into the groove and the second rib being deformed and pressed against the concavity when the insert and shell are assembled.
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: March 17, 1987
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventor: Thomas J. Parchinski
  • Patent number: 4649920
    Abstract: There is disclosed an improved absorbable surgical suture. The suture is coated with an absorbable composition consisting essentially of a high molecular weight poly(alkylene oxide).
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: March 17, 1987
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventor: Joseph D. Rhum
  • Patent number: 4650851
    Abstract: A process for the purification of glycolide which comprises dissolving the glycolide to be purified in a suitable organic solvent, adding alumina to the resulting solution to form a slurry wherein the alumina is in intimate contact with the dissolved glycolide, stirring the slurry under controlled conditions for a period of 1 to 60 minutes, and filtering to remove the alumina and, if desired, evaporating to remove the solvent and recovering the purified glycolide; and the production of suture-grade polyglycolic acid by the polymerization of the resulting purified glycolide.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: March 17, 1987
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: David Rhum, Richard S. Matthews
  • Patent number: 4647565
    Abstract: Dihydropyridines of the formulae ##STR1## wherein R is chlorothienyl or mono- or disubstituted phenyl where said substituent is fluoro, chloro, bromo or trifluoromethyl; R.sup.1 and R.sup.2 are each alykl; R.sup.3 and R.sup.4 when taken separately are each hydrogen or alkyl; R.sup.3 and R.sup.4 when taken together with the nitrogen to which they are attached are piperidine or pyrrolidine; R.sup.5 is alkyl or 2-hydroxyethyl; R.sup.6 is hydrogen or methoxy; X and Z are each hydrogen or methoxy; Y is alkylene; R.sup.7 is chlorophenyl or trifluoromethyl-chlorophenyl; p is 0 or 1; and Q is CH or N are useful in the treatment of hypertension, heart failure and angina.
    Type: Grant
    Filed: June 5, 1985
    Date of Patent: March 3, 1987
    Assignee: Pfizer Inc.
    Inventors: John E. Arrowsmith, Simon F. Campbell, Peter E. Cross, Roger P. Dickinson
  • Patent number: 4647416
    Abstract: A ribbed, porous tube suitable for use as a vascular graft prosthesis is prepared by scoring a stretched or unstretched tube of PTFE, stretching the tube at 200.degree.-320.degree. C. to develop the desired porosity, and heat setting the scored, stretched tube at 327.degree.-450.degree. C. while restraining the tube from axial shrinkage.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: March 3, 1987
    Assignee: Shiley Incorporated
    Inventors: Louis Seiler, Jr., Robert F. Rosenbluth
  • Patent number: 4644005
    Abstract: Ketone containing 1-substituted oxindole-3-carboxamides as antiinflammatory agents prepared by reaction of the 1-substituted oxindole with an isocyanate or by aminolysis of the corresponding alkyl oxindole-3-carboxylate.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: February 17, 1987
    Assignee: Pfizer Inc.
    Inventor: Lawrence S. Melvin, Jr.
  • Patent number: 4642373
    Abstract: 1,2,3,4,4a,4b,5,6,7,8,8a,12b-Dodecahydro-7-(oxo, hydroxy or amino)-9-hydroxy-11-(alkyl, alkoxy or alkoxyalkyl)triphenylenes, 2,3,3a,3b,4,5,6,7,7a,11b-decahydro-6-(oxo, hydroxy or amino)-8-hydroxy-10-(alkyl, alkoxy or alkoxyalkyl)-1H-cyclopenta[1]-phenanthrenes, 2,3,4,4a,4b,5,6,7,8,8a-decahydro-7-(oxo, hydroxy or amino)-9-hydroxy-11-(alkyl, alkoxy, alkoxyalkyl, aralkyl, aralkoxy, aryloxyalkyl or aralkoxyalkyl)-1H-pyrido[1,2-f]phenanthridines, and 1,2,3,3a,3b,4,5,6,7,7a-decahydro-6-(oxo, hydroxy or amino)-8-hydroxy-10-(alkyl, alkoxy or alkoxyalkyl)pyrrolo[1,2-f]phenanthridines and derivatives are valuable as central nervous system active agents or as intermediates to compounds having such activity.
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: February 10, 1987
    Assignee: Pfizer Inc.
    Inventors: James F. Eggler, Michael R. Johnson, Lawrence S. Melvin, Jr.