Patents Represented by Attorney, Agent or Law Firm Marcelo K. Sarkis
  • Patent number: 7429613
    Abstract: A process is provided for preparing (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, R-substituted ester 9 comprising: (a) reacting the aldehyde 1 with the enolate form of (S)-2-hydroxy-1,2,2-triphenylethyl acetate substituent in a chelating co-solvent; (b) hydrolysis of (R,S)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (S)-2-hydroxy-1,2,2-triphenylethyl ester (2a and 2b) using a base, preferably an alkali metal base, preferably in a solvent to form the carboxylic acid 7; (c) treating the acid 7 with a chiral base to form a salt and purifying the salt to obtain enantiomerically enriched (R)-7 chiral base salt; (d) alkylation of the (R)-7 chiral base salt or the free base derived from (R)-7, forming (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid,
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: September 30, 2008
    Assignee: Apotex Pharmachem Inc.
    Inventors: Fan Wang, Daqing Che, Bhaskar Reddy Guntoori, Yajun Zhao, Aaron C. Kinsman, Jody Faught, Alan Chow
  • Patent number: 7193090
    Abstract: A process for preparing (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, tert-butylester comprising: (a) reduction of 5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-oxo-1-pentanoic acid, (R)-2-hydroxy-1,2,2-triphenylethyl ester; (b) hydrolysis of (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (R)-2-hydroxy-1,2,2-triphenylethyl ester using an alkali base in a solvent to form the acid; (c) alkylation of the acid forming (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, tert-butylester.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: March 20, 2007
    Assignee: Apotex Pharmachem Inc.
    Inventors: Bhaskar Reddy Guntoori, Daqing Che, Fan Wang, Yajun Zhao, K. S. Keshava Murthy, Stephen E. Horne
  • Patent number: 7160231
    Abstract: An exercise device comprising a pedal adapted for use with a skate and having a skate engaging portion disposed therewith.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: January 9, 2007
    Inventor: Mohsen Kazemi
  • Patent number: 7125987
    Abstract: A process for preparing Oxcarbazepine III comprising: a) reacting oximinostilbene IV ?with chlorosulfonyl isocyanate in an inert organic solvent and isolating compound V b) hydrolyzing compound V to form crude Oxcarbazepine III c) purifying oxcarbazepine.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: October 24, 2006
    Assignee: Apotex Pharmachem Inc.
    Inventors: Daqing Che, Nadia Corelli-Rennie, Bhaskar Reddy Guntoori, Jodi Faught
  • Patent number: 7112604
    Abstract: A process is provided for preparing (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, R-substituted ester 9 comprising: (a) reacting the aldehyde 1 with the enolate form of (S)-2-hydroxy-1,2,2-triphenylethyl acetate substituent in a chelating co-solvent; (b) hydrolysis of (R,S)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (S)-2-hydroxy-1,2,2-triphenylethyl ester (2a and 2b) using a base, preferably an alkali metal base, preferably in a solvent to form the carboxylic acid 7; (c) treating the acid 7 with a chiral base to form a salt and purifying the salt to obtain enantiomerically enriched (R)-7 chiral base salt; (d) alkylation of the (R)-7 chiral base salt or the free base derived from (R)-7, forming (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid,
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: September 26, 2006
    Assignee: Apotex Pharmachem Inc.
    Inventors: Fan Wang, Daqing Che, Bhaskar Reddy Guntoori, Yajun Zhao, Aaron C. Kinsman, Jody Faught, Alan Chow
  • Patent number: 6875119
    Abstract: An inflatable enclosure comprising: at least one inflating means for inflating said inflatable enclosure; at least one entrance/exit means for entering and exiting said inflatable enclosure; at least one air pressure regulator for maintaining the air pressure in said enclosure when said at least one entrance/exit means is in use, at least one inflatable rigidifying means; wherein at least one of said entrance/exit means and air pressure regulator is air actuated.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: April 5, 2005
    Assignee: Leisure Activities Unlimited
    Inventors: John Kenneth Murphy, Sylvia Ostroskie
  • Patent number: 6812222
    Abstract: The present invention relates to a peritoneal dialysis solution comprising at least one amino sugar in an effective amount sufficient to create an osmotic pressure to effect the removal of water by diffusion from the patient's blood across the peritoneal membrane into the solution. In one embodiment the at least one amino sugar is selected from the group consisting of acetylated amino sugars, preferably N-acetylglucosamine, deacetylated amino sugars and combinations thereof.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: November 2, 2004
    Inventors: George Wu, Paul Y. Tam, Ian W. French
  • Patent number: 6740340
    Abstract: A pharmaceutical tablet which incorporates two smaller tablets, one of which comprises an NSAID and the other of which comprises misoprostol.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: May 25, 2004
    Inventor: Bernard Charles Sherman
  • Patent number: 6739482
    Abstract: A portable device for dispensing drywall patching compound (mud) onto drywall is disclosed. The dispenser has a device on one end used for metering the drywall compound in a controlled manner and has affixed to at least one side an abrasive surface, preferably sand paper that can be used to smooth out the drywall compound when dry. As a preferred embodiment, the cap of the container contains a spatula or other device that can be used to shape the compound as it is being applied.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: May 25, 2004
    Inventor: Kevin M. Jaekel
  • Patent number: 6726588
    Abstract: The differential engine comprises a motor, a torque conversion stage, and a loading mechanism. The torque conversion stage includes first and second differential stages which are coupled together with a pair of shafts, with the shafts rotating in opposite directions. The first differential stage comprises an input shaft which is coupled to the output shaft of the motor, and first and second output shafts which are coupled to the respective shafts. The second differential stage comprises an output coupled to the output drive shaft, and first and second input shafts which are coupled to the respective shafts. The second differential stage includes a gear mechanism which applies a rotational torque to the output drive shaft when a difference occurs between the rotational speeds for the shafts. The rotational speeds of the shafts are varied by loading one or both of the shafts.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: April 27, 2004
    Assignee: CVET Patent Technologies, Inc.
    Inventor: Ervin Weisz
  • Patent number: 6712404
    Abstract: A handle for a movable closure, such as a screen having at least one edge frame preferably for retaining a screen cloth, said closure being movable into a slot-like recess disposed in a structure against which the closure engages. The handle comprising a first inside flexible member and a second outside flexible member.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: March 30, 2004
    Assignee: Preferred Engineering Products Ltd.
    Inventors: Sean Davies, Sinnathamby Kupenthirarajan
  • Patent number: 6701994
    Abstract: A sliding screen frame for a closure assembly, the frame comprising framing sections assembled to form the screen frame, one of the frame sections being adapted to contain a roll out screen, the roll out screen being slidable between a fully extended position, whereat the screen is substantially payed out from the roll, and a fully retracted position; wherein the screen frame is free to slide in the closure assembly whether the roll screen is at the fully extended or the fully retracted position.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: March 9, 2004
    Assignee: 420820 Ontario Limited
    Inventors: Shaul Goldenberg, Sean Davies, Sinnathamby Kupenthirarajan
  • Patent number: 6679002
    Abstract: A reinforcing block for a closure tilt latch, comprising a body fastened in a closure track fastened to a frame, said body having a top and bottom and having a locking detent extending therein said locking detent providing a vertical face extending toward said top of said body from intermediate said top and bottom, the tilt latch being compatible with the vertical face of said locking detent, wherein when said latch engages said detent said block provides a reinforcement path to the closure frame to strengthen the loading capability of said closure and to reduce the risk of the latch from disengaging said track under loading which track would be subject to distortion had the block not been utilized.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: January 20, 2004
    Assignee: 420820 Ontario Limited
    Inventors: John Robert Davies, Sean Davies, Sinnathamby Kupenthirarajan
  • Patent number: 6667054
    Abstract: Tablets for oral administration comprising metformin hydrochloride and methylcellulose.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: December 23, 2003
    Inventor: Bernard Charles Sherman
  • Patent number: 6666234
    Abstract: A colored institutional towel comprising ground warp, fill, and pile warped yarns, all of said yarns being colored by intimately draw blending a predetermined amount of pre-dyed polyester fiber with cotton fiber when the yarn is spun and twisted to thereby form a predetermined color for the institutional towel.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: December 23, 2003
    Assignee: Blair Mills L.P.
    Inventors: David Eugene Hamby, Wilbur Mattison Rice
  • Patent number: 6655444
    Abstract: A method of advertising in a shower for the hospitality industry including providing replaceable advertisements on a shower closure, for example a door, curtain or the like.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: December 2, 2003
    Assignee: 420820 Ontario Limited
    Inventors: Shaul Goldenberg, Sean Davies
  • Patent number: 6656503
    Abstract: A pharmaceutical tablet comprising a core and a film coating wherein the core comprises an NSAID and the film coating comprises a polymer and misoprostol.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: December 2, 2003
    Inventor: Bernard Charles Sherman
  • Patent number: 6642384
    Abstract: The present invention relates to a process for the production of (S)-1,2,3,4-tetrahydro-6,7-dialkoxy-3-isoquinolinecarboxylic acid compounds (1) and their derivatives from Levodopa (L-Dopa). The ultimately prepared compounds are used as intermediates for, but not limited to, the preparation of substituted derivatives of 1,2,3,4-tetrahydro-6,7-dialkoxy-3-isoquinolinecarboxylic acid wherein R1 is hydrogen, lower alkyl, C2-C12 acyl, or R1O together are methylenedioxy; R2 is hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, substituted aryl, aralkyl or substituted aralkyl group; and R3 is hydrogen, C2-C12 acyl group, benzyl, alkoxylcarbonyl group, or aralkoxyl carbonyl group.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: November 4, 2003
    Assignee: Brantford Chemicals Inc.
    Inventors: Zhi-Xian Wang, Stephen E. Horne
  • Patent number: D484991
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: January 6, 2004
    Assignee: 420820 Ontario Limited
    Inventors: Sean Davies, Shaul Goldenberg, Sinnathamby Kupenthirarajan
  • Patent number: D494401
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: August 17, 2004
    Assignee: 420820 Ontario Limited
    Inventors: Sean James Davies, Shaul Goldenberg, Sinnathamby Kupenthirarajan