Patents by Inventor Stanley J. Padegimas

Stanley J. Padegimas 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: 20100029844
    Abstract: Novel liquid polymeric compounds of the formula (I) wherein the general symbols are as defined in claim 1, are disclosed as stabilizers for protecting organic materials against oxidative, thermal or light-induced degradation.
    Type: Application
    Filed: August 30, 2007
    Publication date: February 4, 2010
    Inventors: Jochen Fink, Rudolf Pfaendner, Roswell Easton King, Sai Ping Shum, Stanley J. Padegimas
  • Patent number: 7468410
    Abstract: The present invention discloses a process for stabilizing polyolefin compositions against the deleterious effects of melt processing, heat aging and exposure to combustion products of natural gas, which process comprises incorporating or applying to a polyolefin an effective stabilizing amount of a tris-(mono-alkyl)phenyl phosphite ester of the formula I, or a mixture of phosphite esters of formula I, where each R is the same or different and is straight or branched chain alkyl of from 1 to 8 carbon atoms, and where said phosphite ester or phosphite ester mixture is in the liquid state at 25° C. and 1 atm of pressure. Also disclosed is a stabilized composition comprising polyolefin and a present phosphite ester or phosphite ester mixture as well as certain mixtures of tris-(mono-alkyl)phenyl phosphite. The present liquid phosphite ester stabilizers are especially compatible with low density polyethylene.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: December 23, 2008
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Laura F. Chafin, Walid Al-Akhdar, Sai Ping Shum, Stanley J. Padegimas, Roswell Easton King
  • Patent number: 5554785
    Abstract: Esters of acrylic and methacrylic acid with alcohols and polyols having levels of purity greater than about 95% as measured by gas chromatography using an 11 meter RT.times.200 trifluoropropylmethyl polysiloxane column, a flame ionization detector, an injection temperature of C., an initial column temperature of C. for two minutes, followed by heating to C. at a rate of C. per minute and a detector temperature of C.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 10, 1996
    Assignee: CPS Chemical Company, Inc.
    Inventors: Louise E. Trapasso, Stanley J. Padegimas, Peter F. Epstein, Paul L. K. Hung, Purnendu Mukhopadhyay, Philip L. Meisel
  • Patent number: 5498751
    Abstract: Esters of monocarboxylic acids are transesterified with 1,2- and 1,3-polyols by reaction in the presence of a catalytically effective amount of a dialkyltin oxide blended with an excess of dialkyltin dichloride, so that a polyol ester of the monocarboxylic acid is formed. A transesterification reaction of alcohols and polyols with methyl or ethyl mono- or polycarboxylic acid esters utilizing a dimethyltin catalyst is also disclosed, in which the alcohol or polyol carboxylic acid ester formed is essentially free of the organotin catalyst. Carboxylic acid esters produced by the described methods, as well as carboxylic acid esters that are free of organotin catalysts are also disclosed.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: March 12, 1996
    Assignee: CPS Chemical Company, Inc.
    Inventors: Louis E. Trapasso, Stanley J. Padegimas, Peter F. Epstein, Paul L. K. Hung, Purnendu Mukhopadhyay, Philip L. Meisel