Patents by Inventor Jangi Lal Oswal

Jangi Lal Oswal 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 indigo dyeing of wool and wool blends
    Patent number: 8187342
    Abstract: A process for indigo dyeing of wool and wool blends comprising the steps of subjecting the wool and wool blends to a step of pretreatment by impregnation with a shrink resistance agent, subjecting the pretreated wool and wool blend yarns to the step of indigo dyeing and post dyeing, wherein the step of dyeing and post dyeing includes a single step or a plurality of steps of impregnation of the pretreated wool and wool blends in an indigo dye bath followed each time by the step of oxidation.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: May 29, 2012
    Assignee: Malwa Industries Limited
    Inventors: Jangi Lal Oswal, Rishi Oswal
  • Process for Dyeing of Wool or Silk and Their Blends with Indigo
    Publication number: 20100205751
    Abstract: A process for pretreatment of wool, silk or blends thereof rendering it receptive for the subsequent step of indigo dyeing. The pretreatment steps comprise in the step of cationization for imparting cationic charge and generating other dye combining sites.
    Type: Application
    Filed: June 27, 2006
    Publication date: August 19, 2010
    Applicant: MALWA INDUSTRIES LIMITED
    Inventors: Jangi Lal Oswal, Rishi Oswal
  • Process for the preparation of indigo dyed yarn for use in the manufacture of knitted fabric
    Patent number: 7185405
    Abstract: A process for the preparation of indigo dyed yarn for use in the manufacture of knitted fabric by a knitting machine comprising in the steps of, forming a dyed rope of yarn by the steps of indigo dyeing; individualizing the yarn of said dyed rope; forming separate packages of the yarn on separate spools of fixed ends; preparing individual hanks of each yarn end of each spool by hank maker; converting said hanks into individual cones of single yarn.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: March 6, 2007
    Assignee: Malwa Cotton Spinning Mills Ltd.
    Inventors: B. L. Rastogi, Jangi Lal Oswal