Patents by Inventor Tad L. Patton

Tad L. Patton 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).

  • Patent number: 5223603
    Abstract: Oxygen barrier structures such as packages, laminated films, etc. are disclosed. The oxygen barrier has at least one layer comprising a polymer having oxamide units of the formula: ##STR1## and may further include amide units selected from the formulae: ##STR2## wherein R and R' are independently hydrocarbyl radicals of from 2 to 20 carbon atoms, and R" is a hydrocarbyl radical of from 1 to 18 carbon atoms. The polyoxamide or copoly(amide-oxamide) layer has an oxygen permeability which, at a high relative humidity, is less than or about the same as the oxygen permeability at a low relative humidity. Also disclosed is a method of protecting an article such as a foodstuff against oxidation by packaging the article with the oxygen barrier structure.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: June 29, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Tad L. Patton, James M. Farley
  • Patent number: 5180797
    Abstract: A polyketone having a molecular weight greater than 1,000 and containing 0.01 to 50 mole percent carbonyl groups is contacted directly with an organic peroxyacid to produce a polyester. The polyketone is in a single homogenous phase during the oxidation process and may be in either solid or liquid form.In a preferred embodiment, a molten polyketone is contacted with an organic peroxyacid in a reactive extrusion process to produce polyester pellets.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: January 19, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Richard G. Austin, Tad L. Patton
  • Patent number: 5093466
    Abstract: Oxygen barrier structures such as packages, laminated films, etc. are disclosed. The oxygen barrier has at least one layer comprising a polymer having oxamide units of the formula: ##STR1## and may further include amide units selected from the formulae: ##STR2## wherein R and R' are independently hydrocarbyl radicals of from 2 to 20 carbon atoms, and R" is a hydrocarbyl radical of from 1 to 18 carbon atoms. The polyoxamide or copoly(amide-oxamide) layer has an oxygen permeability which, at a high relative humidity, is less than or about the same as the oxygen permeability at a low relative humidity. Also disclosed is a method of protecting an article such as a foodstuff against oxidation by packaging the article with the oxygen barrrier structure.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: March 3, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Tad L. Patton, James M. Farley
  • Patent number: 5061751
    Abstract: A thermoplastic composition containing a first phase of a polar thermoplastic polymer, a second phase of non-polar polyolefin incompatible therewith, and a vinylpyrrolidone grafted polyolefin at least at an interface to compatibilize the different phases. A mixed phase monolayer of the composition containing ethylene-vinyl alcohol copolymer blended with vinylpyrrolidone grafted polypropylene as the first phase, and polypropylene as the second phase, has good oxygen and moisture barrier properties for food packaging applications. Also disclosed is a tieless multilayer laminate of the composition having an interlayer of a blend of ethylene-vinyl alcohol copolymer and vinylpyrrolidone grafted polypropylene and outer layers of polypropylene. The laminate has good oxygen and moisture barrier properties for food packaging applications.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: October 29, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Tad L. Patton
  • Patent number: 4383067
    Abstract: Normally intractable polymers of the structure: ##STR1## wherein X is O or NH, provided at least one X is O, such as poly(parabanic acids) are made extrudable by composition with greater than 15 to 60 weight percent of phosphate ester of the structure (R.sub.1 --O).sub.3 P=O wherein R.sub.1 is: ##STR2## and each R.sub.2 and R.sub.3 is independently selected from H or --CH.sub.3 or (b) an alkyl radical having 1 to 8 carbon atoms.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: May 10, 1983
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4352905
    Abstract: Normally intractable polymers of the structure: ##STR1## wherein X is O or NH, provided at least one X is O, such as poly(parabanic acids) are made extrudable by composition with from 10 to 60 weight percent of diaryl ketone.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: October 5, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4330453
    Abstract: Normally intractable polymers of the structure: ##STR1## wherein Y is 0 or NH, provided at least one X is 0, such as poly(parabanic acids) are made extrudable by composition with from 10 to 60 weight percent of an ester of aromatic (carboxylic acid).
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: May 18, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4324836
    Abstract: Normally intractable polymers of the structure: ##STR1## wherein X is O or NH, provided at least one X is O, such as poly(parabanic acids) are made extrudable by composition with from 10 to 60 weight percent of an aromatic nitrile.
    Type: Grant
    Filed: June 11, 1980
    Date of Patent: April 13, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4294785
    Abstract: Organic amides, solutions of polymers thereof, which polymers are subject to hydrolysis and degradation in the presence of amines, and polymers isolated therefrom are stabilized by the presence of aromatic sulfonic acid esters of aliphatic, arylaliphatic and alicyclic alcohols and polyols.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: October 13, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4208486
    Abstract: Organic amides, solutions of polymers thereof, which polymers are subject to hydrolysis and degradation in the presence of amines, and polymers isolated therefrom are stabilized by the presence of aromatic sulfonic acid esters of aliphatic, arylaliphatic and alicyclic alcohols and polyols.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: June 17, 1980
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4147684
    Abstract: Normally intractable polymers of the structure: ##STR1## wherein X is O or NH, provided at least one X is O, such as poly (parabanic) acids are made extrudable by composition with from 10 to 60 weight percent of an N,N-dialkyl aromatic sulfonamide plasticizer.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: April 3, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4144213
    Abstract: Organic amides, solutions of polymers thereof, which polymers are subject to hydrolysis and degradation in the presence of amines, and polymers isolated therefrom are stabilized by the presence of aromatic sulfonic acid esters of aliphatic, arylaliphatic and alicyclic alcohols and polyols.
    Type: Grant
    Filed: May 17, 1977
    Date of Patent: March 13, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4105616
    Abstract: New solvents have been found for certain poly(parabanic acids) and poly(iminoimidazolidinediones). Epihalohydrins and glycidyl acrylate have been found to be solvents. Cellular films are produced by immersing films of the polymer solutions in aprotic anti-solvents such as aliphatic ketones, esters, hydrocarbons, halogenated hydrocarbons and ethers.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: August 8, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton
  • Patent number: 4035404
    Abstract: The monoadduct of a diisocyanate and hydrogen cyanide, a cyanoformamidyl isocyanate, is produced by he reaction of 1 mole of a diisocyanate with 1 mole of hydrogen cyanide. Heterocyclic polymers are produced by the head-to-tail polymerization of cyanoformamidyl isocyanates in an appropriate solvent and in the presence of an effective catalyst.
    Type: Grant
    Filed: June 8, 1972
    Date of Patent: July 12, 1977
    Assignee: Exxon Research and Engineering Company
    Inventor: Tad L. Patton
  • Patent number: 4028311
    Abstract: Processes for the efficient sulfuric acid hydrolysis of poly(iminoimidazolidinediones) (PIPA) to the corresponding polyparabanic acids (PPA) have been developed. Process conditions can be manipulated to favor the formation of large crystalline particles of ammonium sulfate, a byproduct of the reaction, so that they can be readily separated from the reaction solution.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: June 7, 1977
    Assignee: Exxon Research and Engineering Company
    Inventor: Tad L. Patton
  • Patent number: 3950416
    Abstract: Dicyanoformamides having aromatic moieties as novel composition of matter are prepared by the reaction of a diisocyanate having an aromatic moiety with two (2) moles of hydrogen cyanide in the presence of a specially defined, hindered catalyst which will not promote further polymerization.
    Type: Grant
    Filed: March 25, 1974
    Date of Patent: April 13, 1976
    Assignee: Exxon Research and Engineering Company
    Inventor: Tad L. Patton
  • Patent number: 3948941
    Abstract: An improved process for preparing imides comprises reacting acid anhydrides with organic isocyanate groups in the presence of cyanide ion as a catalyst.
    Type: Grant
    Filed: October 26, 1973
    Date of Patent: April 6, 1976
    Assignee: Exxon Research and Engineering Company
    Inventor: Tad L. Patton
  • Patent number: 3936584
    Abstract: This invention relates to processes and techniques for forming either coatings or self-supporting films from polymeric powders which melt at high temperatures (>150.degree. C.) and cannot be made to fuse with the application of high temperatures. In particular, polyparabanic acid films and coatings are prepared from polyparabanic acid powders, utilizing vapors and mists of certain aprotic dipolar solvents.
    Type: Grant
    Filed: September 17, 1973
    Date of Patent: February 3, 1976
    Assignee: Exxon Research and Engineering Company
    Inventor: Tad L. Patton
  • Patent number: RE29100
    Abstract: Polyolefins are selectively hydroperoxidized in an aqueous slurry with an ozone-oxygen mixture at temperatures between 65.degree. and 100.degree. C for a time which does not exceed one hour to introduce sufficient hydroperoxides for later graft copolymerization while minimizing formations of higher oxidation products of the polymer and limiting molecular weight degradation.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: January 4, 1977
    Assignee: Exxon Research and Engineering Company
    Inventor: Tad L. Patton
  • Patent number: RE30067
    Abstract: Novel iminoimidazolidinedione polymers containing imide groups (hereinafter PIPA-IM) are prepared from mixtures of dianhydrides, hydrogen cyanide and diisocyanates in an appropriate solvent and with an appropriate catalyst. The cyanide ion is an effective catalyst for all of the reactions involved. Hydrolysis of these polymers produces novel parabanic acid polymers containing imide groups (hereinafter PPA-IM).
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: August 7, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventor: Tad L. Patton