Patents Assigned to Pfizer
  • Patent number: 4891372
    Abstract: An antiarrhythmic agent of the formula ##STR1## or a pharmaceutically acceptable salt thereof; wherein R.sup.1 is H, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy;X is O, ##STR2## or a direct link; and R.sup.2 and R.sup.3, which are the same or different, are each C.sub.1 -C.sub.4 alkyl, with the proviso that when X is ##STR3## R.sup.2 and R.sup.3 are the same.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: January 2, 1990
    Assignee: Pfizer Inc.
    Inventors: John E. Arrowsmith, Peter E. Cross
  • Patent number: 4891373
    Abstract: Novel aminopropanol derivatives of 1,4:3,6-dianhydro-hexitol nitrates of the general formula I ##STR1## in which X has the meaning given in the specification, processes for their preparation and their use in preventing and treating angina pectoris, systemic hypertension and pulmonary hypertension in mammals.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: January 2, 1990
    Assignee: Pfizer Inc.
    Inventors: Peter Stoss, Matyas Leitold, Rodney Yeates
  • Patent number: 4889128
    Abstract: A steerable catheter having a Doppler crystal at the tip to measure the velocity of blood in vivo--and inferentially the blood flow. The catheter includes two passageways, one passageway being exposed to the blood stream with the other passsageway containing the electrical leads to the Doppler crystal. The one passageway is dimensioned for receiving a wire guide for accurately manipulating the catheter. Preferably, the catheter incorporates an inflatable angio-balloon operable to distend the blood vessel in the region of a stenosis. Thus, blood flow can be determined in the region of the stenosis before and/or after the vessel is distended. The passageways are preferably defined by a pair of generally concentric tubes with the doppler crystal doughnut-shaped and sealingly disposed at the tip of the catheter.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: December 26, 1989
    Assignee: Pfizer Hospital Products
    Inventor: Huntley D. Millar
  • Patent number: 4889531
    Abstract: A pressure regulator including high and low pressure chambers separated by a divider having an opening, a closing member biassed to a closing position for closing the opening with a biassing force according to a desired pressure differential between the chambers, and a damping device for damping the resulting force on the closing member. There is also disclosed a fluid drainage system having a suction chamber with a suction regulator, and various arrangements of diaphragms for measuring pressure differentials. An anti-spill device for the draining system is disclosed as well.
    Type: Grant
    Filed: August 6, 1987
    Date of Patent: December 26, 1989
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Nicholas F. D'Antonio, Nicholas J. D'Antonio
  • Patent number: 4885370
    Abstract: A two-step process for the synthesis of certain indol-2(3H)-ones from indoles, and the 3,3-dibromoindol-2-(3H)-ones which are intermediates in that process.
    Type: Grant
    Filed: March 17, 1988
    Date of Patent: December 5, 1989
    Assignee: Pfizer Inc.
    Inventor: Anthony Marfat
  • Patent number: 4885294
    Abstract: An antifungal agent of the formula: ##STR1## wherein R is phenyl group which may be substituted by 1 to 3 substituents each independently selected from halo and CF.sub.3 ; R.sup.1 is either (a) a phenyl group substituted by a group of the formula --N.dbd.CH--N(C.sub.1 -C.sub.4 alkyl).sub.2, ##STR2## or (b) a 5- or 6-membered aromatic heterocyclic group which may be benzo-fused and substituted by 1 or 2 substituents each independently selected from halo, C.sub.1 -C.sub.4 alkyl and halo-(C.sub.1 or C.sub.2 alkyl), said heterocyclic group being attached to the nitrogen atom of the piperazine ring by a carbon atom;andR.sup.2 is H or CH.sub.3 ; or an O-ester or O-ether thereof which is a C.sub.2 -C.sub.4 alkanoyl or benzoyl ester, or a C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl, phenyl-(C.sub.1 -C.sub.4 alkyl) or phenyl ether, said phenyl and benzoyl groups of said O-esters and O-ethers may be substituted by one or two substituents each selected from C.sub.1 -C.sub.4 alkyl, halo and halo-(C.sub.1 or C.sub.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: December 5, 1989
    Assignee: Pfizer Inc.
    Inventors: Stephen J. Ray, Kenneth Richardson
  • Patent number: 4883795
    Abstract: Arylpiperazinyl-ethyl (or butyl)-heterocyclic compounds and their pharmaceutically acceptable acid addition salts are neuroleptic agents. They are useful in the treatment of psychotic disorders.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: November 28, 1989
    Assignee: Pfizer Inc.
    Inventors: John A. Lowe, III, Arthur A. Nagel
  • Patent number: 4882337
    Abstract: Novel 4-amino-6,7-dimethoxy-2-(6,7-disubstituted-1,2,3,4-tetrahydroisoquinol-2-y l)quinoline compounds have been prepared, including their pharmaceutically acceptable salts and various novel key intermediates therefor. These compounds are useful in therapy as anti-arrhythmic agents and therefore, are of value in the treatment of various cardiac arrhythmias. Preferred compounds include 4-amino-6,7-dimethoxy-2-(6-hydroxy-7-methoxy-1,2,3,4-tetrahydroisoquinol-2 -yl)quinoline and 4-amino-6,7-dimethoxy-2-(7-hydroxy-6-methoxy-1,2,3,4-tetrahydroisoquinol-2 -yl)quinoline. Methods for preparing these compounds from known starting materials are provided.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: November 21, 1989
    Assignee: Pfizer Inc.
    Inventor: Nigel J. Cussans
  • Patent number: 4880810
    Abstract: 1-Phenylquinazoline-1H,3H-2,4-diones and 1-phenylpyrido-[2,3d]-pyrimidine-1H,3H-2,4-diones, their esters and acid addition salts, and pharmaceutical compositions containing such compounds have antidepressant, anti-inflammatory and analgesic activity.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: November 14, 1989
    Assignee: Pfizer Inc.
    Inventor: John A. Lowe, III
  • Patent number: 4880741
    Abstract: Process for transformation of Yarrowia lipolytica, vectors useful therefor comprising DNA of a microbial vector and chromosomal DNA of Y. lipolytica and transformants comprising said vectors in E. coli and Y. lipolytica, and integrative shuttle vectors for Escherichia-Yarrowia transgeneric cloning. Said vectors or subclones thereof enable creation of Y. lipolytica cloning vectors into which specific or random segments of DNA can be inserted and the resulting vectors used to transform a suitable host microbe, especially Y. lipolytica, to improve the fermentation characteristics thereof and hence their industrial utilization.The methodology described permits the cloning of genes from a gene library of Y. lipolytica by complementation with an integrating vector.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: November 14, 1989
    Assignee: Pfizer Inc.
    Inventors: Lance S. Davidow, John R. DeZeeuw
  • Patent number: 4879303
    Abstract: Improved pharmaceutical salts of amlodipine, particularly the besylate salt, and pharmaceutical compositions thereof. These salts find utility as anti-ischaemic and anti-hypertensive agents.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: November 7, 1989
    Assignee: Pfizer Inc.
    Inventors: Edward Davison, James I. Wells
  • Patent number: 4879391
    Abstract: Certain substituted 1-phenyl-3-(aminoalkylidene)-2(1H,3H)-indolones are highly potent gabaergic agents, valuable in the treatment of individuals suffering from schizophrenia or reversing the side effects of a previously or concurrently administered neuroleptic agent; or in the treatment of epilepsy. A wider class of substituted 1-phenyl-3-(aminoalkylidene)-2(1H,3H)-indolones, together with 1-phenyl-3-(2-pyrrolidinylidiene-2(1H,3H)-indolones, and homologs thereof, are valuable in the treatment of anxiety.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: November 7, 1989
    Assignee: Pfizer Inc.
    Inventors: Harry R. Howard, Jr., Reinhard Sarges
  • Patent number: 4878913
    Abstract: Devices and methods for transmitting neural signals from a proximal stump of a transected nerve to a prosthetic apparatus are disclosed employing microelectrodes, preferably conductive fiber networks, capable of sensing electrical signals from a nerve and transmitting such signals to a prosthetic apparatus; and a semipermeable guidance channel disposed about the microelectrodes. The channels include an opening adapted to receive the proximal stump of a transected nerve, such that the channel promotes the growth of the stump and the formation of an electrical connection between the transected nerve and the microelectrode.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: November 7, 1989
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Patrick Aebischer, Robert F. Valentini, Pierre M. Galletti
  • Patent number: 4876367
    Abstract: A series of novel, macrocyclic polyether compounds. The macrocycles have a 21-membered ring, containing six oxygen atoms, and they have a carboxy group (or a salt thereof) directed towards the interior of the ring. Administration of the compounds of the invention to ruminant animals (e.g. cattle and sheep) modifies their digestive fermentation processes such that the volatile fatty acids produced in the rumen contain a higher proportion of propionates rather than acetates, thereby increasing the efficiency of feed utilization in said ruminant animals. Additionally, the compounds of the invention show antibacterial activity in vitro against certain gram-positive microorganisms.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: October 24, 1989
    Assignee: Pfizer Inc.
    Inventor: Frank J. Urban
  • Patent number: 4874757
    Abstract: An improved antiinflammatory composition and method of treating inflammation which employs a combination of antiinflammatory piroxicam, or a pharmaceutically acceptable salt thereof, with analgesic acetaminophen, antidepressant doxepin, bronchodilator pirbuterol, minor tranquilizer diazepam, or antihypertensive trimazosin.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: October 17, 1989
    Assignee: Pfizer Inc.
    Inventors: Thomas C. Crawford, Stanley L. Keely, David L. Larson, Joseph G. Lombardino, James J. Maciejko
  • Patent number: 4874864
    Abstract: Compounds of the formula ##STR1## where HET is a heterocyclic group, n is an integer of 0 to 2 and R.sup.1 is hydrogen or lower alkyl are protease inhibitors use as anti-plasmin and anti-thrombin agents.
    Type: Grant
    Filed: May 24, 1988
    Date of Patent: October 17, 1989
    Assignee: Pfizer Inc.
    Inventors: Rodney C. Schnur, Anton F. J. Fliri
  • Patent number: 4874877
    Abstract: Intermediates and a stepwise process for the conversion of D-methionine or certain of its derivatives to optically active compounds of the formula ##STR1## wherein R is (C.sub.1 -C.sub.3) alkyl, phenyl or tolyl. The latter compounds are in turn useful as an intermediate in the preparation of penem antibiotic 5R,6S-6-(1R-hydroxyethyl)-2-(1R-oxo-3S-thiolanylthio)-2-penem-3-carboxylic acid and corresponding pharmaceutically acceptable salts and esters.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: October 17, 1989
    Assignee: Pfizer Inc.
    Inventor: Frank J. Urban
  • Patent number: 4871369
    Abstract: A femoral hip implant for use in patients requiring a long distal section of the femoral component is provided. For example, it can be used in patients undergoing revision surgery or requiring an implant with a long stem because of a fracture in the femur or a bone defect (for example as a result of a tumor removal). The implant is specially curved in its distal section so that the implant avoids impingement on the wall of the medullary canal even in the region of the isthumus of the bone.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: October 3, 1989
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventor: Charles J. Muller
  • Patent number: 4870084
    Abstract: Bicyclic fused benzenoid compounds of the formula ##STR1## and pharmaceutically acceptable cationic and acid addition salts thereof, where M is O, CH.sub.2 or NR.sub.6 ; R.sub.6 is hydrogen, formyl, carbobenzyloxy or certain carboalkoxyalkyl, alkanoyl, alkyl, aralkyl or aralkylcarbonyl groups;A' is:(1) A where one of A and B is hydrogen such that when A is hydrogen, B is C(R.sub.2 R.sub.3)(CH.sub.2).sub.f Q and f is 1 or 2; when B is hydrogen, A is C(R.sub.2 R.sub.3)(CH.sub.2).sub.f Q and f is 0 or 1, when taken together A and OR.sub.1 form a lactone or certain derivatives thereof;(2) A' is ##STR2## (3) A' is Q.sub.3 ; Q is CO.sub.2 R.sub.7, COR.sub.8, C(OH)R.sub.8 R.sub.9, CN, CONR.sub.12 R.sub.13, CH.sub.2 NR.sub.12 R.sub.13, CH.sub.2 NHCOR.sub.14, CH.sub.2 NHSO.sub.2 R.sub.17 or 5-tetrazoyl;Q.sub.3 is ##STR3## 5-tetrazolyl, CH.sub.2 CONHCOR.sub.7, COOH or certain ester, amide, carboximido or sulfonimido derivatives thereof, CONHOH, CONHCONH.sub.2, or COCH.sub.2 Q.sub.4 where Q.sub.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: September 26, 1989
    Assignee: Pfizer Inc.
    Inventors: James F. Eggler, Michael R. Johnson, Lawrence S. Melvin, Jr.
  • Patent number: 4870170
    Abstract: Process and intermediates for the conversion of 3R,4R-4-acetoxy-3-[1R-1-(silyloxy)ethyl]-2-acetidinones to antibacterial 5R,6S-6-(1R-1-hydroxyethyl)-2-(1-oxo-3-thiolanylthio)-2-penem-3-carboxylic acids, and the pharmaceutically-acceptable salts and pivaloyloxymethyl esters thereof.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: September 26, 1989
    Assignee: Pfizer Inc.
    Inventors: Robert A. Volkmann, David L. Lindner