Patents Assigned to Pfizer
  • Patent number: 4927847
    Abstract: Antiparasitic milbemycin derivatives having at the C.25 position a substituted 2-propenyl group --C(CH.sub.3).dbd.CH--R.sup.2 wherein R.sup.2 is a C.sub.3 -C.sub.8 alkyl, alkenyl or alkynyl group which may optionally contain an oxygen or sulphur atom as part of the chain, or a C.sub.3 -C.sub.8 cycloalkyl or cycloalkenyl group, or a 3 to 6 membered oxygen or sulphur containing heterocyclic ring which may optionally be substituted by one or more alkyl groups or halogen atoms; and process for their preparation.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: May 22, 1990
    Assignee: Pfizer Inc.
    Inventors: Christopher J. Dutton, David A. Perry
  • Patent number: 4927618
    Abstract: This invention concerns a process for the preparation of large surface area, finely divided precipitated calcium carbonate which comprises introducing carbon dioxide into an aqueous slurry of greater than about five weight percent calcium hydroxide containing an anionic organopolyphosphonate polyelectrolyte, starting the introduction at a temperature above about 7.degree. C. and below about 18.degree. C., continuing the introduction until calcite precipitation is substantially complete and adding a quantity of polybasic acid to the slurry in an amount greater than about 0.3% by weight of the precipitated calcium carbonate. This invention also concerns said large surface area, finely divided precipitated calcium carbonate which has been coated with a fatty acid derivative and polymeric compositions which contain such coated calcium carbonate.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: May 22, 1990
    Assignee: Pfizer Inc.
    Inventors: Krishna K. Mathur, Robert K. Resnik, Randall G. Simmons
  • Patent number: 4923438
    Abstract: An intraoperative blood recovery system and method for salvaging operative blood while simultaneously delivering previously collected blood to a reinfusion system. A blood collection and transfer reservoir, having multiple compartments which can be separated by vacuum or pressure barriers, is designed to maintain a continuous suction for blood inflow while blood previously collected can be simultaneously transported through the reservoir to achieve an uninterrupted flow of blood into and delivery of blood out of the reservoir.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: May 8, 1990
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Alfred V. Vasconcellos, Preston J. Keeler, III
  • Patent number: 4923864
    Abstract: Simple amides and derivatives thereof useful for inhibiting the angiotensinogen-cleaving action of the enzyme renin.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: May 8, 1990
    Assignee: Pfizer Inc.
    Inventor: Robert L. Rosati
  • Patent number: 4921994
    Abstract: Compounds having the formula ##STR1## R.sub.1 is hydrogen, benzyl or an ester moiety; Y is --CH(R.sub.2 ")CH(R.sub.2)-- or --CH(R.sub.3)CH.sub.2 --;R.sub.2 " is hydrogen or methyl;R.sub.2 is OH or X-substituted (C.sub.1-16) alkyl;R.sub.3 is OH, cyano or X-substituted (C.sub.1-3) alkyl;X is --OR.sub.6, --SR.sub.6, --S(O)R.sub.6, --S(O).sub.2 R.sub.6, --NR.sub.6 R.sub.7, --COOR.sub.7, --CONR.sub.7 R.sub.8 or oxo;with the proviso that when X is --NR.sub.6 R.sub.7, --COOR.sub.7 or --CONR.sub.7 R.sub.8, said group is located on the terminal carbon atom of R.sub.2 or R.sub.3 ;R.sub.6 is hydrogen, (C.sub.1-6) alkyl or acetyl;each of R.sub.7 and R.sub.8 is hydrogen or (C.sub.1-6) alkyl;s is an integer of 1 or 2;with the proviso that when R.sub.6 is acetyl, R.sub.7 is hydrogen and X is other than S(O)R.sub.6 or S(O).sub.2 R.sub.6 ;z-w is alkyl, phenylalkyl or pyridylalkyl which can have an oxygen atom as part of the alkyl chain, and their use as CNS agents, antidiarrheals and antiemetics.
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: May 1, 1990
    Assignee: Pfizer Inc.
    Inventors: Michael R. Johnson, Lawrence S. Melvin, Jr.
  • Patent number: 4921972
    Abstract: Intermediates and a stepwise process for the conversion of an alkyl 4-chloro-3R-hydroxybutyrate 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: July 12, 1989
    Date of Patent: May 1, 1990
    Assignee: Pfizer Inc.
    Inventor: Robert A. Volkmann
  • Patent number: 4920967
    Abstract: An invasive, fluid velocity measuring wire guide particularly adapted and of a size (less than 0.030 inch) for subselective placement in the coronary arterial tree, which includes a Doppler mechanism for determining the blood flow velocity in the region of the distal end of the wire guide. Although the wire guide is particularly adapted for diagnosing coronary arterial disease subselectively; it is of such a size and manipulability to be useful in other blood flow and biological fluid flow analyses. Preferably, the wire guide is flexible and steerable for precise placement. The wire guide includes an elongated wire member having a Doppler crystal attached in longitudinal alignment at its distal end. Electrical leads extend from the Doppler crystal along the wire member to the appropriate test equipment for measuring the fluid flow velocity in the region of the Doppler crystal. Preferred embodiments of the Doppler means include piezoelectric crystals and piezoelectric polymers.
    Type: Grant
    Filed: August 11, 1987
    Date of Patent: May 1, 1990
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Cliff N. Cottonaro, Scott M. Evans, David R. Pflueger, Huntly D. Millar
  • Patent number: 4920224
    Abstract: Variously substituted trans-3-[3-(3-hydroxypiperid-2-yl)-2-oxopropyl]quinazolin-4(3H)-ones, a method of controlling or preventing coccidiosis in poultry therewith, intermediates therefor, and a process for the preparation of certain intermediates therefor.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: April 24, 1990
    Assignee: Pfizer Inc.
    Inventor: Edward A. Glazer
  • Patent number: 4920050
    Abstract: An acidic polycyclic ether antibiotic, having structure established by X-ray crystallography, is formed by fermentation of a novel microorganism, Streptomyces sp. ATCC 53862. This novel antibiotic is useful as an anticoccidial in chickens, in the prevention or treatment of swine dysentery, and as a growth promotant in cattle and swine.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: April 24, 1990
    Assignee: Pfizer Inc.
    Inventors: Walter P. Cullen, James R. Hauske, Gloria J. Kostek, Hiroshi Maeda, Junsuke Tone
  • Patent number: 4920215
    Abstract: The antibiotic of the formula: ##STR1## wherein R is ##STR2## The antibiotic is useful for the treatment of swine dysentery and for promoting growth and/or increasing the efficiency of food utilization in poultry, swine and ruminants.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: April 24, 1990
    Assignee: Pfizer Inc.
    Inventors: Kelvin S. Holdom, John C. Ruddock, Junsuke Tone, Hiroshi Maeda, Martin R. Jefson
  • Patent number: 4919121
    Abstract: A hand-operated inflator device for inflating the expander on a balloon-type catheter. It comprises a molded plastic housing for retaining a syringe tube therein for containing an inflation fluid. The housing also includes an internally threaded surface. A syringe plunger having an internal longitudinal bore and a longitudinal slot formed through the wall thereof has a piston mounted on the distal end for insertion into the syringe body. Fitted into the longitudinal slot is an externally threaded member which can be raised and lowered in a radial direction by manipulation of a manuable actuable means positioned in the longitudinal bore of the plunger. When the externally threaded member is raised, its teeth mesh with the teeth on the internally threaded annular surface of the housing, but when lowered, the threaded surfaces are disengaged. When the two are engaged, the piston is advanced in the syringe tube by rotating the plunger.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: April 24, 1990
    Assignee: Schneider (USA) Inc., A Pfizer Company
    Inventors: Mark A. Rydell, Rick L. Shockey
  • Patent number: 4920221
    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: October 16, 1986
    Date of Patent: April 24, 1990
    Assignee: Pfizer Inc.
    Inventors: James F. Eggler, Michael R. Johnson, Lawrence S. Melvin, Jr.
  • Patent number: 4918163
    Abstract: The present invention provides novel hybridoma cell lines which produce monoclonal antibodies (MoAbs) that bind epitopes found on lipopolysaccharide most commonly associated with the endotoxin core of gram negative bacteria and exhibit broad cross-reactivity with gram negative bacteria of different genera and effectively neutralize endotoxin. At least one of the MoAbs disclosed (XMMEN-J5D) binds an epitope also found on gram positive bacteria. The hybridomas are produced by fusing an immortal cell, a cell having the ability to replicate indefinitely in myeloma cell culture, and an effector immune cell following immunization of the immune cell host with a preparation of a gram negative bacteria. While several individual hybridoma cell lines producing monoclonal antibodies to lipopolysaccharide are described, the present invention adds to the state of the art an entire family of hybridoma producing monoclonal antibodies to lipopolysaccharide-associated epitopes.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: April 17, 1990
    Assignee: Pfizer Inc.
    Inventor: Lowell S. Young
  • Patent number: 4916209
    Abstract: Novel, semi-crystalline depsipeptide polymers and copolymers particularly suitable for use in fabricating bioabsorbable medical implant devices such as sutures or clips and obtained through ring-opening polymerization of certain 3-substituted-2,5-morpholinediones prepared by reacting a naturally occurring alpha-amino acid with an alpha-halo acid chloride in inert solvent in the presence of an acid acceptor.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: April 10, 1990
    Assignee: Pfizer Inc.
    Inventors: Fu-Ning Fung, Raymond C. Glowaky
  • Patent number: 4916226
    Abstract: Preparative method for 3S-(3-pyridylmethyl)-6-(2-quinolyl)methoxy-4S-chromanol via its salt with natural tartaric acid.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: April 10, 1990
    Assignee: Pfizer Inc.
    Inventor: Bernard S. Moore
  • Patent number: 4914207
    Abstract: Arylthiazolylimidazoles as 5HT.sub.3 antagonists useful in the treatment of nausea, anxiety, pain, schizoprenia and gastrointestinal disorders.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: April 3, 1990
    Assignee: Pfizer Inc.
    Inventors: Arthur A. Nagel, James P. Rizzi, Terry J. Rosen
  • Patent number: 4914101
    Abstract: R.sup.1 is hydrogen, halogen or C.sub.1 to C.sub.4 alkyl;R.sup.2 is hydrogen or C.sub.1 to C.sub.4 alkyl; and Ar is phenyl or phenyl substituted with one or more substituents selected from C.sub.1 to C.sub.4 alkyl, halo, trifluoromethyl, nitro, hydroxyl, halophenyl, or C.sub.1 to C.sub.4 alkoxy.The compounds are useful in treating inflammation or other prostaglandin or leukotriene mediated diseases.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: April 3, 1990
    Assignee: Pfizer Inc.
    Inventor: Anthony Marfat
  • Patent number: 4912130
    Abstract: A new acidic polycyclic antibiotic UK-61,689 has the formula: ##STR1## or a pharmaceutically acceptable cationic salt thereof. The antiobiotic and its cationic salts are active against a variety of microorganisms and are effective in controlling coccidiosis, enteritis and swine dysentery as well as being effective in promotion of growth and/or improving efficiency of feed utilization in swine and ruminants.
    Type: Grant
    Filed: December 6, 1988
    Date of Patent: March 27, 1990
    Assignee: Pfizer Inc.
    Inventors: Alexander C. Goudie, Nigel D. A. Walshe
  • Patent number: 4910204
    Abstract: A compound of the formula ##STR1## or a pharmaceutically acceptable salt thereof, wherein R.sup.1 is hydrogen; R.sup.2 is (C.sub.1 -C.sub.15) alkyl, (C.sub.3 -C.sub.15)alkenyl, phenyl, substituted phenyl, (C.sub.7 -C.sub.20)-phenylalkyl, or substituted (C.sub.7 -C.sub.20)phenylalkyl wherein the substituents on the substituted phenyl and substituted phenylalkyl are independently one or two of fluoro, chloro, (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3 alkoxy, and trifluoromethyl; or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a pyrrolodinyl, substituted pyrrolidinyl, piperidyl or substituted piperidyl group, wherein the substituents on said substituted pyrrolidinyl and piperidyl groups are independently one of (C.sub.1 -C.sub.6)alkyl, phenyl, and (C.sub.7 -C.sub.9)phenylalkyl; and R.sup.3 is hydrogen, (C.sub.1 -C.sub.6)alkyl, phenyl, substituted phenyl, (C.sub.7 -C.sub.9)phenylalkyl, or substituted (C.sub.7 -C.sub.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: March 20, 1990
    Assignee: Pfizer Inc.
    Inventors: Frederick J. Walker, John L. LaMattina, Brian T. O'Neill
  • Patent number: 4908316
    Abstract: An antibiotic has been isolated from fermentation of a new Streptomyces culture. The new ionophore is active as an antibacterial and anticoccidial agent.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: March 13, 1990
    Assignee: Pfizer Inc.
    Inventors: Walter P. Cullen, John R. Oscarson, Junsuke Tone, Hiroshi Maeda