Patents by Inventor Nadejda Spassova

Nadejda Spassova 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 preparing fluorescein quinoid form
    Patent number: 10745373
    Abstract: The present invention relates to a process for preparing fluorescein quinoid form of Formula (I): Furthermore, the present invention relates to a new solid fluorescein form and a process for the preparation thereof. The present invention also relates to the use of said new solid fluorescein form in the synthesis of fluorescein quinoid form.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: August 18, 2020
    Assignee: Delmar Chemicals Inc.
    Inventors: Nicolas Tesson, Eduard Bugan, Nadejda Spassova, Alain Menard
  • PROCESS FOR PREPARING FLUORESCEIN QUINOID FORM
    Publication number: 20200039949
    Abstract: The present invention relates to a process for preparing fluorescein quinoid form of Formula (I): Furthermore, the present invention relates to a new solid fluorescein form and a process for the preparation thereof. The present invention also relates to the use of said new solid fluorescein form in the synthesis of fluorescein quinoid form.
    Type: Application
    Filed: July 31, 2019
    Publication date: February 6, 2020
    Applicant: Delmar Chemicals Inc.
    Inventors: Nicholas Tesson, Eduard Bugan, Nadejda Spassova
  • NOVEL SULFONATE-BASED TRIMEBUTINE SALTS
    Publication number: 20150057316
    Abstract: The present description relates to compounds of Formula I (A+ X?), a diastereoisomer, an enantiomer, or a mixture thereof, pharmaceutical composition comprising same and uses thereof for gastrointestinal endoscopic and medical imaging applications, and for the treatment of visceral pain: Where R1 and R2 are as defined herein
    Type: Application
    Filed: March 11, 2013
    Publication date: February 26, 2015
    Inventors: Jean-Francois Meunier, Cheuk Kun Lau, Daniel Guay, Gregory Bydlinski, Nadejda Spassova, Louis-David Cantin, Maxime Ranger