Patents Assigned to J. T. Baker Chemical Company
  • Patent number: 4721573
    Abstract: Sulfonic derivatives of N-acylated covalently bound, non-crosslinked polyethyleneimine bonded phase silicas of the formula: ##STR1## whereinis the backbone of a silica gel or glass, n is an integer such that the polyethyleneiminopropyl silane group has an average molecular weight of from about 400 to about 1800; q is an integer of zero or one; R is selected from the group consisting of hydrogen, --CH.sub.2).sub.x H or --CH.sub.2).sub.m COOH where x is an integer of 1 or 2 and m is an integer of zero or 1; when R is hydrogen or --CH.sub.2).sub.x H then R.sup.1 is --CH.sub.2).sub.p COOH where p is an integer of zero or 1, and when R is --CH.sub.2).sub.m COOH then R.sup.1 is selected from the group consisting of hydrogen or --CH.sub.2).sub.y H where y is a integer of zero or 1, are especially useful as solid phases for the purification and separation of proteins having isoelectric points of below about 5.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: January 26, 1988
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, David R. Nau
  • Patent number: 4680121
    Abstract: A bonded phase silica product of the formula: ##STR1## in which ##STR2## is the backbone of a silica gel or controlled pore glass, X is selected from --O--, --S--, ##STR3## each R and R.sup.1 are each independently selected from hydrogen, an alkyl group of from 1 to 3 carbon atoms and --CH.sub.2).sub.m COOR.sup.3, R.sup.2 and R.sup.3 are each independently alkyl of from 1 to 4 carbon atoms, n is an integer of from 2 to 5, p is zero or one and m is an interger of from 1 to 4, is suitable for use in solid phase extraction for cleanup of urine samples for analysis of cannabinoids.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: July 14, 1987
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, Joseph M. Patterson, III
  • Patent number: 4680120
    Abstract: The reaction product of silica gel or controlled pore glass and carboalkoxyalkyl silanes are suitable for use as packing in solid phase extraction columns for cleanup of urine samples for analysis of cannabinoids.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: July 14, 1987
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, Joseph M. Patterson
  • Patent number: 4661248
    Abstract: Sulfonic derivatives of N-acylated covalently bound, non-crosslinked polyethyleneimine bonded phase silicas of the formula: ##STR1## is the backbone of a silica gel or controlled pore glass, n is an integer such that the polyethyleneiminopropyl silane group has an average molecular weight of from about 400 to about 1800; q is an integer of zero or one; R is selected from the group consisting of hydrogen, --(CH.sub.2).sub.x H or --(CH.sub.2).sub.m COOH where x is an integer of 1 or 2 and m is an integer of zero or 1; when R is hydrogen or --(CH.sub.2).sub.x H then R.sup.1 is --(CH.sub.2).sub.p COOH where p is an integer of zero or 1, and when R is --(CH.sub.2).sub.m COOH then R.sup.1 is selected from the group consisting of hydrogen or --(CH.sub.2).sub.y H where y is an integer of zero or 1, are especially useful as solid phases for the purification and separation of proteins having isoelectric points of below about 5.
    Type: Grant
    Filed: March 6, 1986
    Date of Patent: April 28, 1987
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, David R. Nau
  • Patent number: 4650784
    Abstract: A bonded phase silica product of the formula: ##STR1## in which ##STR2## is the backbone of a silica gel or controlled pore glass, X is selected from --O--, --S--, ##STR3## each R and R.sup.1 are each independently selected from hydrogen, an alkyl group of from 1 to 3 carbon atoms and --CH.sub.2).sub.m COOR.sup.3, R.sup.2 and R.sup.3 are each independently alkyl of from 1 to 4 carbon atoms, n is an integer of from 2 to 5, p is zero or one and m is an integer of from 1 to 4, is suitable for use in solid phase extraction for cleanup of urine samples for analysis of cannabinoids.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: March 17, 1987
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, Joseph M. Patterson, III
  • Patent number: 4640909
    Abstract: The reaction product of silica gel or controlled pore glass and carboalkoxyalkyl silanes are suitable for use as packing in solid phase extraction columns for cleanup of urine samples for analysis of cannabinoids.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: February 3, 1987
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, Joseph M. Patterson
  • Patent number: 4626491
    Abstract: Positive deep ultra-violet photoresists which are base developable comprise base soluble polymers and as photosensitive solubilizing agents oligomeric compounds of the formula ##STR1## wherein X is alkylene, arylene, alkoxyalkylene or aralkylene and n is a positive integer such that the molecular weight of the oligomeric compound is from about 500 to about 3000.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: December 2, 1986
    Assignee: J. T. Baker Chemical Company
    Inventor: Gary M. Gray
  • Patent number: 4624908
    Abstract: Positive deep ultra-violet photoresists which are base developable comprise base soluble polymers and as photosensitive solubilizing agents compounds of the formula ##STR1## wherein: R.sub.4 is hydrogen or --C(O)R.sub.5 in which R.sub.5 is an alkoxy group having from 1 to about 20 carbon atoms;R.sub.6, R.sub.7, R.sub.8 and R.sub.9 may each be the same or different and be hydrogen or alkyl of from 1 to about 6 carbon atoms when R.sub.4 is --C(O)R.sub.5 ; orwhen R.sub.4 is either hydrogen or --C(O)R.sub.5,(a) one of either R.sub.6 or R.sub.7 and one of either R.sub.8 and R.sub.9 is hydrogen and the other of either R.sub.6 or R.sub.7 and the other of either R.sub.8 or R.sub.9 which is not hydrogen together form an alkylene group of from 1 to about 6 carbon atoms, or(b) one set of either R.sub.6 and R.sub.7 together or R.sub.8 and R.sub.9 together is a cycloalkyl group of from 4 to 8 carbon atoms and the other set of either R.sub.6 and R.sub.7 or R.sub.8 and R.sub.9 that is not cycloalkyl are each hydrogen.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: November 25, 1986
    Assignee: J. T. Baker Chemical Company
    Inventor: George Schwartzkopf
  • Patent number: 4622283
    Abstract: Positive deep ultra-violet photoresists which are base developable comprise base soluble polymers and as photosensitive solubilizing agents compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 can each individually be alkyl, aryl, alkoxy alkyl, aralkyl or haloalkyl radicals or R.sup.1 and R.sup.2 taken together can be an alkylene radical.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: November 11, 1986
    Assignee: J. T. Baker Chemical Company
    Inventor: Gary M. Gray
  • Patent number: 4612034
    Abstract: An improved herbicidal formulation comprising a mixture of the isopropylamine salt of glyphosate and an effective potentiating amount of an ammonium, quaternary alkyl ammonium, alkali metal or alkaline earth metal thiocyanate.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: September 16, 1986
    Assignee: J. T. Baker Chemical Company
    Inventors: Paul J. Kruger, George Schwartzkopf
  • Patent number: 4606825
    Abstract: A method of separating and recovering immunoglobulin G from biological fluids by liquid chromatographic or solid phase extraction processes utilizing, as the solid phase, a carboxylated form of silica gel or controlled pore glass bearing non-cross-linked covalently bound polyethylenimine functions.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: August 19, 1986
    Assignee: J. T. Baker Chemical Company
    Inventors: Laura J. Crane, David R. Nau
  • Patent number: 4604235
    Abstract: A method of chromatographically separating monoclonal antibody type IgM from mouse ascites fluid utilizing a particular chromatographic packing of silica gel bearing bound polyethylenimine functions.
    Type: Grant
    Filed: May 23, 1984
    Date of Patent: August 5, 1986
    Assignee: J. T. Baker Chemical Company
    Inventor: Michael Flashner
  • Patent number: 4540486
    Abstract: The reaction product of silica gel or controlled pore glass and polyethyleniminopropyl trimethoxy silane suitable for use as chromatographic column packing.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: September 10, 1985
    Assignee: J. T. Baker Chemical Company
    Inventor: Hugh E. Ramsden
  • Patent number: 4523997
    Abstract: p-Nitrophenylester of succinoylaminopropyl silica gel is useful as an affinity matrix for reacting with ligand for use in affinity chromatography. The affinity matrix, upon reaction with a ligand, releases one molecule of p-nitrophenolate ion for every molecule of ligand that reacts and the solution turns yellow as the reaction occurs.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: June 18, 1985
    Assignee: J. T. Baker Chemical Company
    Inventors: Laura J. Crane, Hugh E. Ramsden
  • Patent number: 4522724
    Abstract: Improved diazonium affinity matrixes are provided which are storable stable and may be stored for extended periods for future use. The improved affinity matrixes are diazonium silica gel affinity matrixes containing an amine linkage and especially the fluoborate salts thereof.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: June 11, 1985
    Assignee: J. T. Baker Chemical Company
    Inventor: Hugh E. Ramsden
  • Patent number: 4499231
    Abstract: A pellicle for use in projection printing comprises a pellicle in which the transparent film is formed from a polyvinyl butyral resin or from a casting composition which is a mixture of a polyvinyl butyral resin and a dispersion of colloidal silica and a silicone resin which is a lower aliphatic alcohol-water solution of the partial condensate of a silanol. A pellicle employing such films are useful in the near, mid and deep UV regions.
    Type: Grant
    Filed: March 22, 1983
    Date of Patent: February 12, 1985
    Assignee: J. T. Baker Chemical Company
    Inventors: Irl E. Ward, Philip M. Papoojian
  • Patent number: 4482591
    Abstract: A pellicle for use in projection printing comprises a pellicle in which the transparent film is formed from a polyvinyl butyral resin or from a casting composition which is a mixture of a polyvinyl butyral resin and a dispersion of colloidal silica and a silicone resin which is a lower aliphatic alcohol-water solution of the partial condensate of a silanol. A pellicle employing such films are useful in the near, mid and deep UV regions.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: November 13, 1984
    Assignee: J. T. Baker Chemical Company
    Inventor: Irl E. Ward
  • Patent number: 4476172
    Abstract: A pellicle for use in projection printing comprises a pellicle in which the transparent film is formed from the novel film forming reaction product of a polyvinyl butyral resin with a silane. Pellicles employing such films are useful in the near, mid and deep UV regions.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: October 9, 1984
    Assignee: J. T. Baker Chemical Company
    Inventor: Irl E. Ward
  • Patent number: 4428871
    Abstract: Stripping compositions for removing resist materials from substrates comprise compositions of a 2-pyrrolidinone compound and a diethylene glycol monoalkyl ether compound. Polyethylene glycol may be added to provide even more effective stripping compositions.
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: January 31, 1984
    Assignee: J. T. Baker Chemical Company
    Inventors: Irl E. Ward, Lisa G. Hallquist, Thomas J. Hurley
  • Patent number: 4403029
    Abstract: Stripping compositions for removing resist materials from substrates comprise compositions of dimethylacetamide or dimethylformamide or a mixture thereof and a tetrahydrothiophene 1,1-dioxide compound.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: September 6, 1983
    Assignee: J. T. Baker Chemical Company
    Inventors: Irl E. Ward, Jr., Lisa G. Hallquist, Thomas J. Hurley