Patents by Inventor Mark Chasin

Mark Chasin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6037470
    Abstract: The present invention comprises a method of synthesizing compounds of formula (I): wherein Z, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.8 are as described herein; comprising the steps of.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: March 14, 2000
    Assignee: Euro-Celtique S.A.
    Inventors: David J. Cavalla, Mark Chasin, Peter Hofer
  • Patent number: 6025361
    Abstract: Disclosed are compounds of formula (I), wherein R.sup.1, R.sup.3 and R.sup.8 are independently alkyl, aryl or aralkyl, and R.sup.2 is selected from the group consisting of S and O, R.sup.6 is selected from the group consisting of S and O, provided that R.sup.2 and R.sup.6 are not both O. The compounds are effective PDE IV inhibitors and possess improved PDE IV inhibition and improved selectivity with regard to PDE III inhibition. Methods of treatment using the compounds are also disclosed.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: February 15, 2000
    Assignee: Euro-Celtique, S.A.
    Inventors: David Cavalla, Peter Hofer, Mark Chasin
  • Patent number: 6024982
    Abstract: A controlled release tablet for oral administration is disclosed which has a tablet core including an insoluble therapeutically active agent having an aqueous solubility of less than or equal to about 5 mg/ml in a sufficient amount to render a therapeutic effect. The core provides rapid release of said therapeutically active agent upon exposure to aqueous solutions. The tablet core is coated with a controlled release coating permitting sustained release of said therapeutically active agent when said coated tablet is exposed to aqueous solutions.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: February 15, 2000
    Assignee: Euro-Celtique, S.A.
    Inventors: Benjamin Oshlack, Mark Chasin
  • Patent number: 5977119
    Abstract: Disclosed are compounds of the formula: ##STR1## wherein R.sup.1, R.sup.3 and R.sup.8 are independently alkyl, aryl or aralkyl, and R.sup.2 is selected from the group consisting of S and O, R.sup.6 is selected from the group consisting of S and O, provided that R.sup.2 and R.sup.6 are not both O. The compounds are effective PDE IV inhibitors and possess improved PDE IV inhibition and improved selectivity with regard to PDE III inhibition. Methods of treatment using the compounds are also disclosed.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: November 2, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: David John Cavalla, Peter Hofer, Mark Chasin
  • Patent number: 5968551
    Abstract: Sustained release oral solid dosage forms of opioid analgesics are provided as multiparticulate systems which are bioavailable and which provide effective blood levels of the opioid analgesic for at least about 24 hours. A unit dose of the opioid analgesic contains a plurality of substrates including the opioid analgesic in sustained release form. The substrates have a diameter from about 0.1 mm to about 3 mm.
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: October 19, 1999
    Assignee: Purdue Pharma L.P.
    Inventors: Benjamin Oshlack, Mark Chasin
  • Patent number: 5965161
    Abstract: A unit dose sustained-release oral dosage form containing a plurality of melt-extruded particles, each consisting essentially of a therapeutically active agent, one or more retardants, and an optional water-insoluble binder is disclosed. The particles have a length of from about 0.1 to about 12 mm and can be of varying diameters and each unit dose provides a release of therapeutically active agents over at least about 8 hours. Methods of preparing the unit doses as well as extrusion processes and methods of treatment are also disclosed.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: October 12, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: Benjamin Oshlack, Mark Chasin, Hua-Pin Huang
  • Patent number: 5958459
    Abstract: Solid controlled-release oral dosage forms comprising a therapeutically effective amount of an opioid analgesic or a salt thereof which provide an extended duration of pain relief of about 24 hours, have a dissolution rate in-vitro of the dosage form, when measured by the USP Paddle Method of 100 rpm in 900 ml aqueous buffer at 37.degree. C. from about 12.5% to about 42.5% (by weight) active agent released after 1 hour, from about 25% to about 55% (by weight) active agent released after 2 hours, from about 45% to about 75% (by weight) opioid analgesic released after 4 hours and greater than about 60% (by weight) opioid analgesic released after 8 hours, the in-vitro release rate being substantially independent of pH and chosen such that the peak plasma level of active agent obtained in-vivo between about 2 and about 8 hours after administration of the dosage form.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: September 28, 1999
    Assignee: Purdue Pharma L.P.
    Inventors: Mark Chasin, Benjamin Oshlack, Frank Pedi, Jr.
  • Patent number: 5958452
    Abstract: Bioavailable sustained release oral opioid analgesic dosage forms, comprising a plurality of multiparticulates produced via melt extrusion techniques are disclosed.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: September 28, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: Benjamin Oshlack, Mark Chasin, Hua-Pin Huang
  • Patent number: 5942241
    Abstract: A formulation and methods for inducing sustained regional local anesthesia in a patient comprising a substrate comprising a local anesthetic and an effective amount of a biocompatible, biodegradable, controlled release material prolonging the release of the local anesthetic from the substrate to obtain a reversible local anesthesia when implanted or injected in a patient, and a pharmaceutically acceptable, i.e., non-toxic, non-glucocorticoid augmenting agent effective to prolong the duration of the local anesthesia for a time period longer than that obtainable from the substrate without the augmenting agent.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: August 24, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: Mark Chasin, Richard Sackler, Ronald M. Burch, Paul Goldenheim, Joseph Tigner
  • Patent number: 5939422
    Abstract: Disclosed is a compound of the formula (I): whereinR.sub.3, R.sub.6a and R.sub.8 are the same or different and represent a C.sub.2-8 alkyl which is unbranched or branched and unsubstituted or substituted; C.sub.3-8 cycloalkyl which is unsubstituted or substituted; C.sub.4-8 cycloalkylalkyl wherein the cycloalkyl portion is unsubstituted or substituted; aryl which is unsubstituted or substituted; aralkyl C.sub.1-4 ; heterocyclyl; and heterocyclylalkyl (C.sub.1 -C.sub.4)R.sub.6b represents H or R.sub.6a, or together R.sub.6b, N, and R.sub.6a make a C.sub.3 -C.sub.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: August 17, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: David Cavalla, Anddre Gehrig, Mark Chasin, Peter Hofer, Peter Wintergest
  • Patent number: 5922751
    Abstract: Novel compounds which are effective PDE IV inhibitors are disclosed The compounds possess similar or improved PDE IV inhibition as compared to rolipram, with improved selectivity with regard to, e.g., PDE III inhibition. Preferred compounds are 3-(3-cyclopentyloxy-4-methoxy-benzylamino)-4-hydroxymethyl pyrazole and 3-(3-cyclopentyloxy-4-methoxybenzylamino)-4-methoxymethylpyrazole.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: July 13, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: David John Cavalla, Mark Chasin, Lloyd J. Dolby, Richard William Frith
  • Patent number: 5889014
    Abstract: Novel compounds which are effective PDE IV inhibitors are disclosed. The compounds have the formula: ##STR1## wherein: R.sub.1 and R.sub.2 may be the same or different and each is selected from the group consisting of hydrogen, saturated or unsaturated straight-chain or branched C.sub.1-12 alkyl groups, cycloalkyl and cycloalkyl-alkyl groups containing from 3 to 10 carbon atoms in the cycloalkyl moiety;R.sub.3 is hydrogen, halogen, or a saturated or unsaturated straight-chain or branched C.sub.1-12 alkyl group, a cycloalkyl and cycloalkyl-alkyl groups containing from 3 to 7 carbon atoms in the cycloalkyl moiety;R.sub.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: March 30, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: David John Cavalla, Lloyd J. Dolby, Mark Chasin
  • Patent number: 5864037
    Abstract: Disclosed is a process for the preparation of a compound of Formula IV having the structure: ##STR1## wherein R.sub.6 is N(R.sub.6a)(R.sub.6b);R.sub.3 represents a C.sub.2-8, alkyl which is unbranched or branched and unsubstituted or substituted; C.sub.3-8 cycloalkyl which is unsubstituted or substituted; C.sub.4-8 cycloalkylalkyl wherein the cycloalkyl portion is unsubstituted or substituted; aryl or benzyl which is optionally unsubstituted or substituted; ar(C.sub.1-4)alkyl; a heterocyclyl group, ring optionally substituted; heterocyclyl (C.sub.1 -C.sub.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: January 26, 1999
    Assignee: Euro-Celtique, S.A.
    Inventors: Mark Chasin, David Cavalla, Peter Hofer
  • Patent number: 5747060
    Abstract: A formulation for inducing sustained regional local anesthesia in a patient comprising a substrate comprising a local anesthetic and an effective amount of a biocompatible, biodegradable, controlled release material prolonging the release of the local anesthetic from the substrate to obtain a reversible nerve blockade when implanted or injected in a patient, and an amount of colchicine effective to prolong the duration of the local anesthesia for a time period longer than that obtainable from the substrate without colchicine.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: May 5, 1998
    Assignee: Euro-Celtique, S.A.
    Inventors: Richard Sackler, Paul Goldenheim, Mark Chasin
  • Patent number: 5744473
    Abstract: Novel compounds which are effective PDE IV inhibitors are disclosed. The compounds possess improved PDE IV inhibition as compared to theophylline or rolipram, with improved selectivity with regard to, e.g., PDE V inhibition. Also provided is a process of making compounds of Formula I. Compounds of the present invention are represented by Formula I: ##STR1## its pharmaceutically acceptable salts, hydrochloride salts, or prodrug forms thereof, wherein:X.sub.1a, X.sub.1b are independently selected from --NH and --N-lower alkyl;X.sub.2a, X.sub.2b are optionally present and are independently selected from S(O)n, O, CH.sub.2, and NH;P.sub.1a, P.sub.1b, P.sub.2a, P.sub.2b, P.sub.4a, and P.sub.4b are independently selected from N, or CH;R.sub.1a, R.sub.1b, R.sub.2a, R.sub.2b, R.sub.3a and R.sub.3b are independently selected from H, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 branched alkyl, C.sub.3 -C.sub.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: April 28, 1998
    Assignee: Euro-Celtique, S.A.
    Inventors: Mark Chasin, Peter Hofer, David Cavalla
  • Patent number: 5716611
    Abstract: Novel topical formulations an anti-microbially effective amount of povidone iodine and a water-washable emollient, as well as, methods for their preparation, are disclosed.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: February 10, 1998
    Assignee: Euro-Celtique, S.A.
    Inventors: Benjamin Oshlack, Mark Chasin, Richard Sackler, Dileep Bhagwat
  • Patent number: 5681585
    Abstract: A stabilized solid controlled release dosage form having a coating derived from an aqueous dispersion of ethylcellulose is obtained by overcoating a substrate including a therapeutically active with an aqueous dispersion of ethylcellulose and then curing the coated substrate at a temperature and relative humidity elevated to a suitable level above ambient conditions until the coated dosage form attains a stabilized dissolution profile substantially unaffected by exposure to storage conditions of elevated temperature and/or elevated relative humidity.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: October 28, 1997
    Assignee: Euro-Celtique, S.A.
    Inventors: Benjamin Oshlack, Mark Chasin, Frank Pedi, Jr.
  • Patent number: 5665737
    Abstract: Novel compounds which are effective PDE IV inhibitors are disclosed. The compounds possess improved PDE IV inhibition as compared to theophylline or rolipram, with improved selectivity with regard to, e.g., PDE III inhibition.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: September 9, 1997
    Assignee: Euro-Celtique, S.A.
    Inventors: John David Cavalla, Lloyd J. Dolby, Peter Hofer, Mark Chasin
  • Patent number: 5656295
    Abstract: A method for substantially reducing the range in daily dosages required to control pain in approximately 90% of patients is disclosed whereby an oral solid controlled release dosage formulation having from about 10 to about 40 mg of oxycodone or a salt thereof is administered to a patient. The formulation provides a mean maximum plasma concentration of oxycodone from about 6 to about 60 ng/ml from a mean of about 2 to about 4.5 hours after administration, and a mean minimum plasma concentration from about 3 to about 30 ng/ml from about 10 to about 14 hours after repeated "q12h" (i.e., every 12 hour) administration through steady-state conditions.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: August 12, 1997
    Assignee: Euro-Celtique, S.A.
    Inventors: Benjamin Oshlack, Mark Chasin, John Joseph Minogue, Robert Francis Kaiko
  • Patent number: 5639476
    Abstract: A stable solid controlled release formulation having a coating derived from an aqueous dispersion of a hydrophobic acrylic polymer includes a substrate including an active agent selected from the group consisting of a systemically active therapeutic agent, a locally active therapeutic agent, a disinfecting and sanitizing agent, a cleansing agent, a fragrance agent and a fertilizing agent, overcoated with an aqueous dispersion of the plasticized water-insoluble acrylic polymer. The formulation provides a stable dissolution of the active agent which is unchanged after exposure to accelerated storage conditions.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: June 17, 1997
    Assignee: Euro-Celtique, S.A.
    Inventors: Benjamin Oshlack, Mark Chasin, Frank Pedi, Jr.