Patents by Inventor John Sigler

John Sigler 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).

  • STABILIZED ROTOMOLDED POLYOLEFIN
    Publication number: 20210301102
    Abstract: Polyolefin hollow articles prepared via a rotomolding process are provided stability against the deleterious effects of heat, light and oxygen by incorporating therein a hindered amine light stabilizer, an ultraviolet light absorber and a thioether additive.
    Type: Application
    Filed: August 19, 2019
    Publication date: September 30, 2021
    Inventor: John Sigler
  • FLAME RETARDANT ROTOMOLDED POLYOLEFIN
    Publication number: 20210087471
    Abstract: Polyolefin hollow articles prepared via a rotomolding process are provided flame retardancy by incorporating therein a phosphonate ester, an N-alkoxy hindered amine and melamine cyanurate.
    Type: Application
    Filed: February 20, 2019
    Publication date: March 25, 2021
    Inventors: John A. Sigler, Thomas F. Thompson, Stephen Mark Andrews
  • Rotomolding process for polyethylene articles
    Patent number: 8357324
    Abstract: The present invention relates to a process for the production of polyethylene hollow articles, which process comprises charging the polyethylene with one or more NO-acyl hindered amine additives containing one or more groups of formula (I), filling this mixture into a mold, heating this mold in an oven to above 280° C., such that the additized polyethylene melts, rotating the mold around at least 2 axes, the additized polyethylene spreading to the walls, cooling the mold while still rotating, opening it, and taking the resultant hollow article out, where the group of formula (I) is where Ra is a monoacyl or diacyl radical; R1-R4 are each C1-C6alkyl; and R5 and R6 are each, independently of one another, hydrogen, C1-C6alkyl or C6-C10aryl; or R5 and R6 are together oxygen.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: January 22, 2013
    Assignee: BASF SE
    Inventors: Jiong Yu, John Sigler, Eric Wallis
  • Rotomolding Process for Polyethylene Articles
    Publication number: 20100327487
    Abstract: The present invention relates to a process for the production of polyethylene hollow articles, which process comprises charging the polyethylene with one or more NO-acyl hindered amine additives containing one or more groups of formula (I), filling this mixture into a mold, heating this mold in an oven to above 280° C., such that the additized polyethylene melts, rotating the mold around at least 2 axes, the additized polyethylene spreading to the walls, cooling the mold while still rotating, opening it, and taking the resultant hollow article out, where the group of formula (I) is where Ra is a monoacyl or diacyl radical; R1-R4 are each C1-C6alkyl; and R5 and R6 are each, independently of one another, hydrogen, C1-C6alkyl or C6-C10aryl; or R5 and R6 are together oxygen.
    Type: Application
    Filed: April 19, 2010
    Publication date: December 30, 2010
    Applicant: BASF PERFORMANCE PRODUCTS LLC
    Inventors: Jiong Yu, John Sigler, Eric Wallis