Patents by Inventor Debasish Das

Debasish Das 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).

  • Publication number: 20090106112
    Abstract: A system and method for spending loyalty points over a computerized network to facilitate a loyalty point transaction is disclosed. The system enables a participant of a loyalty program to accept an advance of loyalty point when a loyalty account balance is insufficient to make a desired purchase. An amount of loyalty points available as an advance to a participant is determined based on a number of criteria related to the participant, financial account activity, and loyalty account activity. The participant is allotted a predetermined length of time to earn or purchase enough loyalty points to repay the balance of advanced loyalty points. If, at the conclusion of such predetermined length of time, sufficient points have not been earned to offset the loyalty point advance, the participant is charged the currency value of each outstanding loyalty point.
    Type: Application
    Filed: December 18, 2008
    Publication date: April 23, 2009
    Applicant: American Express Travel Related Services Company, Inc.
    Inventors: Atul Dalmia, Debasish Das, Mary C. Hines, David Kroner, Renu L. Vitale, Jill Kudysch Wiseman
  • Publication number: 20070129955
    Abstract: A system and method for spending loyalty points over a computerized network to facilitate a loyalty point transaction is disclosed. The system enables a participant of a loyalty program to accept an advance of loyalty point when a loyalty account balance is insufficient to make a desired purchase. An amount of loyalty points available as an advance to a participant is determined based on a number of criteria related to the participant, financial account activity, and loyalty account activity. The participant is allotted a predetermined length of time to earn or purchase enough loyalty points to repay the balance of advanced loyalty points. If, at the conclusion of such predetermined length of time, sufficient points have not been earned to offset the loyalty point advance, the participant is charged the currency value of each outstanding loyalty point.
    Type: Application
    Filed: October 10, 2006
    Publication date: June 7, 2007
    Applicant: AMERICAN EXPRESS TRAVEL RELATED SERVICES COMPANY, INC.
    Inventors: Atul Dalmia, Debasish Das, Mary Hines, David Kroner, Renu Vitale, Jill Wiseman
  • Patent number: 6500972
    Abstract: A method of oxidizing trimethylphenol (TMP) to trimethylbenzoquinone (TMBQ) by various molecular sieves containing various transition metals. In this method, TMP, a molecular sieve containing a transition metal in its framework, an oxidant and a solvent are mixed together to form a reaction system. The reaction system reacting at a temperature of about room temperature to 150° C. to obtain TMBQ, and the concentration of TMP is about 5-60% wt.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: December 31, 2002
    Assignee: Chinese Petroleim Corp.
    Inventors: Soofin Cheng, Chia-Lung Tsai, Berryinne Chou, Debasish Das
  • Patent number: 6497857
    Abstract: The present invention provides methods for preparing hydrothermally stable MCM-41 mesoporous molecular sieves incorporating aluminum and other transition metals. The materials prepared by these methods possess a very high surface area and narrow uniform pore distribution in the mesopore region, and are highly thermally stable whereby the ions are not leached out after high temperature annealing.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: December 24, 2002
    Assignee: Chinese Petroleum Corporation
    Inventors: Soofin Cheng, Debasish Das
  • Publication number: 20020143198
    Abstract: A method of oxidizing trimethylphenol (TMP) to trimethylbenzoquinone (TMBQ) by various molecular sieves containing various transition metals. In this method, TMP, a molecular sieve containing a transition metal in its framework, an oxidant and a solvent are mixed together to form a reaction system. The reaction system reacting at a temperature of about room temperature to 150° C. to obtain TMBQ, and the concentration of TMP is about 5-60% wt.
    Type: Application
    Filed: July 25, 2001
    Publication date: October 3, 2002
    Inventors: Soofin Cheng, Chia-Lung Tsai, Berryinne Chou, Debasish Das