Patents by Inventor Karen W WINKOWSKI

Karen W WINKOWSKI 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).

  • Synergistic compositions of dehydroacetic acid and methods for reducing yellowing in various end-user compositions
    Patent number: 11224222
    Abstract: What is described herein is a stable and reduced-yellowing/non-yellowing synergistic preservative composition comprising: (i) about 0.1 wt. % to about 40 wt. % of dehydroacetic acid (DHA); and about 0.1 wt. % to about 99.9 wt. % of at least one aprotic solvent. Also described herein are aqueous and non-aqueous based preservative compositions for various end-user applications, and processes for preparing and using such compositions to reduce yellowing of DHA when added to the end-user applications.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: January 18, 2022
    Assignee: ISP Investments LLC
    Inventors: Raman Premachandran, Kalpa Metha, Jyoti Gupta, Najeeb H. Hakimi, Karen W Winkowski
  • SYNERGISTIC COMPOSITIONS OF DEHYDROACETIC ACID AND METHODS FOR REDUCING YELLOWING IN VARIOUS END-USER COMPOSITIONS
    Publication number: 20180055048
    Abstract: What is described herein is a stable and reduced-yellowing/non-yellowing synergistic preservative composition comprising: (i) about 0.1 wt. % to about 40 wt. % of dehydroacetic acid (DHA); and about 0.1 wt. % to about 99.9 wt. % of at least one aprotic solvent. Also described herein are aqueous and non-aqueous based preservative compositions for various end-user applications, and processes for preparing and using such compositions to reduce yellowing of DHA when added to the end-user applications.
    Type: Application
    Filed: March 25, 2016
    Publication date: March 1, 2018
    Applicant: ISP Investments LLC
    Inventors: Raman PREMACHANDRAN, Kalpa METHA, Jyoti GUPTA, Najeeb H. HAKIMI, Karen W WINKOWSKI