Patents by Inventor Kefang LAI

Kefang LAI 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: 10744152
    Abstract: The present invention discloses an Asarum total polysaccharide extract with antitussive activity, an extraction method thereof and an application in the preparation of a medicine for preventing and treating coughs. The present invention proves that the Asarum total polysaccharide extract has a significant effect of suppressing cough for the first time through a large number of pharmacodynamic tests, has the therapeutic effect approximate to codeine, has the effect of prolonging the cough latent period better than codeine, and also finds that the total Asarum polysaccharide extract has the effects of reducing the cough sensitivity and suppressing the airway inflammation for the first time, has excellent preventive and therapeutic effects on various types of coughs, and can be used for preparing the medicines for preventing and treating cough-related diseases.
    Type: Grant
    Filed: June 3, 2018
    Date of Patent: August 18, 2020
    Assignees: THE FIRST AFFILIATTED HOSPITAL OF GUANGZHOU MEDICAL UNIVERSITY, GUANGZHOU INSTITUTE OF RESPIRATORY DISEASE
    Inventors: Kefang Lai, Xiaodong Liu, Bonian Zhong, Shan Zhong, Yichu Nie
  • Patent number: 10501470
    Abstract: The invention discloses a use of asarinin in preparation of medicines for treating various coughs. The asarinin is used for preparing medicines for treating various coughs separately or in combination with other medicines. The asarinin can be extracted by an SFE-CO2 method. The asarinin and usable drug carriers or excipients are made into various formulations. And the formulations are granules, tablets, capsules, soft capsules, pills, dripping pills, ointments, syrups, injection, oral liquid, tinctures, sustained-releasing drugs, controlled release drugs or targeting preparations.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: December 10, 2019
    Assignees: THE FIRST AFFILIATED HOSPITAL OF GUANGZHOU MEDICAL UNIVERSITY, GUANGZHOU INSTITUTE OF RESPIRATORY DISEASE
    Inventors: Kefang Lai, Xiaodong Liu, Bonian Zhong, Shan Zhong, Chuqin Huang
  • Publication number: 20180305372
    Abstract: The invention discloses a use of asarinin in preparation of medicines for treating various coughs. The asarinin is used for preparing medicines for treating various coughs separately or in combination with other medicines. The asarinin can be extracted by an SFE-CO2 method. The asarinin and usable drug carriers or excipients are made into various formulations. And the formulations are granules, tablets, capsules, soft capsules, pills, dripping pills, ointments, syrups, injection, oral liquid, tinctures, sustained-releasing drugs, controlled release drugs or targeting preparations.
    Type: Application
    Filed: September 4, 2017
    Publication date: October 25, 2018
    Inventors: Kefang LAI, Xiaodong LIU, Bonian ZHONG, Shan ZHONG, Chuqin HUANG
  • Publication number: 20180271896
    Abstract: The present invention discloses an Asarum total polysaccharide extract with antitussive activity, an extraction method thereof and an application in the preparation of a medicine for preventing and treating coughs. The present invention proves that the Asarum total polysaccharide extract has a significant effect of suppressing cough for the first time through a large number of pharmacodynamic tests, has the therapeutic effect approximate to codeine, has the effect of prolonging the cough latent period better than codeine, and also finds that the total Asarum polysaccharide extract has the effects of reducing the cough sensitivity and suppressing the airway inflammation for the first time, has excellent preventive and therapeutic effects on various types of coughs, and can be used for preparing the medicines for preventing and treating cough-related diseases.
    Type: Application
    Filed: June 3, 2018
    Publication date: September 27, 2018
    Inventors: Kefang LAI, Xiaodong LIU, Bonian ZHONG, Shan ZHONG, Yichu NIE
  • Patent number: 9879027
    Abstract: The invention discloses a method for extracting high-purity asarinin and use thereof. The method comprises: putting crude asarum powder in an SFE-CO2 device; under the conditions that an extraction kettle has a pressure of 30-40 Mpa and a temperature of 45-70° C., separating kettles I and II have a pressure of 5-10 Mpa, a temperature of 30-50° C. and the flow rate of CO2 is 35-60 L/h, extracting for 60-240 min to obtain total volatile oil of asarum; standing the total volatile oil of asarum for 24-72 h at a low temperature, and carrying out suction filtration under reduced pressure to obtain crude asarinin; and re-crystallizing the crude asarinin in absolute ethanol twice to obtain pure asarinin. It is found for the first time that asarinin has a good cough-relieving activity and thus can be used in preparing medicines for treating various types of coughs.
    Type: Grant
    Filed: April 23, 2017
    Date of Patent: January 30, 2018
    Inventors: Kefang Lai, Xiaodong Liu, Bonian Zhong, Shan Zhong, Chuqin Huang
  • Publication number: 20170283428
    Abstract: The invention discloses a method for extracting high-purity asarinin and use thereof. The method comprises: putting crude asarum powder in an SFE-CO2 device; under the conditions that an extraction kettle has a pressure of 30-40 Mpa and a temperature of 45-70° C., separating kettles I and II have a pressure of 5-10 Mpa, a temperature of 30-50° C. and the flow rate of CO2 is 35-60 L/h, extracting for 60-240 min to obtain total volatile oil of asarum; standing the total volatile oil of asarum for 24-72 h at a low temperature, and carrying out suction filtration under reduced pressure to obtain crude asarinin; and re-crystallizing the crude asarinin in absolute ethanol twice to obtain pure asarinin. It is found for the first time that asarinin has a good cough-relieving activity and thus can be used in preparing medicines for treating various types of coughs.
    Type: Application
    Filed: April 23, 2017
    Publication date: October 5, 2017
    Applicant: GUANGZHOU INSTITUTE OF RESPIRATORY DISEASE
    Inventors: Kefang LAI, Xiaodong LIU, Bonian ZHONG, Shan ZHONG, Chuqin HUANG
  • Patent number: 9629869
    Abstract: The present invention relates to a new application of Fructus schisandrae total polysaccharides in preparation of medicine or nutraceuticals for treating coughing, and more specifically to a new application of Fructus schisandrae total polysaccharides in preparation of medicine or nutraceuticals for preventing and relieving coughing and eliminating airway inflammation. Experiments demonstrate that the Fructus schisandrae total polysaccharides can remarkably reduce the coughing times of a guinea pig with increased cough sensitivity induced by cigarette smoke and an acute cough guinea pig induced by citric acid smoke, prolong the latent period of cough, and significantly reduce the airway inflammation of the guinea pig with increased cough susceptibility induced by cigarette smoke, so that the Fructus schisandrae total polysaccharides can be used for preparing drugs for preventing cough, relieving cough and eliminating airway inflammation.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: April 25, 2017
    Inventors: Kefang Lai, Shan Zhong, Zhenyong Gan, Xiaodong Liu, Yichu Nie, Nanshan Zhong
  • Publication number: 20170056431
    Abstract: The present invention relates to a new application of Fructus schisandrae total polysaccharides in preparation of medicine or nutraceuticals for treating coughing, and more specifically to a new application of Fructus schisandrae total polysaccharides in preparation of medicine or nutraceuticals for preventing and relieving coughing and eliminating airway inflammation. Experiments demonstrate that the Fructus schisandrae total polysaccharides can remarkably reduce the coughing times of a guinea pig with increased cough sensitivity induced by cigarette smoke and an acute cough guinea pig induced by citric acid smoke, prolong the latent period of cough, and significantly reduce the airway inflammation of the guinea pig with increased cough susceptibility induced by cigarette smoke, so that the Fructus schisandrae total polysaccharides can be used for preparing drugs for preventing cough, relieving cough and eliminating airway inflammation.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Inventors: Kefang Lai, Shan Zhong, Zhenyong Gan, Xiaodong Liu, Yichu Nie, Nanshan Zhong
  • Publication number: 20160339054
    Abstract: The present invention discloses an Asarum total polysaccharide extract with antitussive activity, an extraction method thereof and an application in the preparation of a medicine for preventing and treating coughs. The present invention proves that the Asarum total polysaccharide extract has a significant effect of suppressing cough for the first time through a large number of pharmacodynamic tests, has the therapeutic effect approximate to codeine, has the effect of prolonging the cough latent period better than codeine, and also finds that the total Asarum polysaccharide extract has the effects of reducing the cough sensitivity and suppressing the airway inflammation for the first time, has excellent preventive and therapeutic effects on various types of coughs, and can be used for preparing the medicines for preventing and treating cough-related diseases.
    Type: Application
    Filed: March 25, 2015
    Publication date: November 24, 2016
    Applicants: THE FIRST AFFILIATED HOSPITAL OF GUANGZHOU MEDICAL UNIVERSITY, GUANGZHOU INSTITUTE OF RESPIRATORY DISEASE
    Inventors: Kefang LAI, Xiaodong LIU, Bonian ZHONG, Shan ZHONG, Yichu NIE