Patents by Inventor Montserrant Monsalvatje Llagostera

Montserrant Monsalvatje Llagostera 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).

  • Process for obtaining quinapryl hydrochloride and solvates useful for isolating and purifying quinapryl hydrochloride
    Patent number: RE39888
    Abstract: The process for obtaining quinapril hydrochloride (I) comprises the stages of: a) hydrogenolysis of the benzyl ester of quinapril (II) by treatment in an alcoholic solvent, with concentrated hydrochloric acid or a solution of hydrogen chloride in isopropanol, and hydrogenation; b) removal of the solvent; c) addition of toluene to precipitate the quinapril hydrochloride as a toluene solvate; d) treatment of said solvate with a Class 3 solvent which forms a solvate of quinapril hydrochloride from which it can be removed by drying without degrading; and e) drying of the solvate from step d) to yield quinapril hydrochloride (I), an antihypertensive agent.
    Type: Grant
    Filed: May 25, 1998
    Date of Patent: October 16, 2007
    Assignee: Esteve Quimica, S.A.
    Inventors: Montserrant Monsalvatje Llagostera, Marti Bartra Sanmarti, Jaime Thomas Navarro, Salvador Puig Torres