Patents Represented by Attorney John S. Roberts, Jr.
  • Patent number: 5071765
    Abstract: A method of attacking and removing microbial slime in slime covered surfaces and maintaining a slime-free surface as in exposed cooling tower surfaces and in waste water treatment and paper making. This method comprises utilizing an enzyme blend in 2 to 100 parts per million (ppm) of beta-glucanase, alpha-amylase and protease. Such enzyme blends have been found specifically to digest microbial slime and reduce microbial attachment and biofilm. A specific combination of polysaccharide degrading enzymes is a ratio of 2 parts beta-glucanase to 1 alpha-amylase to 1 protease utilized in 2-100 parts per million. Broadly, the alpha-amylase must be at least 1 and the protease may vary from 0.5 to 1 part.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: December 10, 1991
    Assignee: Nalco Chemical Company
    Inventor: Christopher L. Wiatr
  • Patent number: 5035456
    Abstract: This invention provides improved body length adjustment value structure for a vacuum powered lifting system of the type that embodies a variable length lifting body responsive to the differential of pressure inside that body with atmospheric pressure to resolve critical manual control problems. Thus control is provided by proportional movement of a control member over a substantially linear range producing a smooth progressive movement of the lifting mechanism. This permits non-critical lowering and release of a work load object by unskilled operators. Thus, an air injection valve with an air release port, is positioned within the lifting body having an elongated slot operable over a control range proportionately change the body length by release of a progressively increasing flow of air into the body to increase air pressure and body length over the critical range of lowering and releasing the work load object in response to a corresponding substantially linear movement of the control member.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: July 30, 1991
    Inventor: Robert Messinger
  • Patent number: 5032297
    Abstract: In treating oil well down hole bores, a method of treating subterranean formations by fracturing by utilization of a fluid loss additive (FLA) comprising starch or a mixture of natural and modified starches plus an enzyme which degrades the alpha linkage of starch and does not the degrade the beta linkage of guar and modified guar where used as a viscosity modifier. Natural/modified starches are utilized in a preferred ratio of 3:7 to 7:3 or 1:9 to 9:1 with optimum at 1:1, and the mix is used in the dry form for application from the surface down the bore hole.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: July 16, 1991
    Assignee: Nalco Chemical Company
    Inventors: Charles D. Williamson, Stephan J. Allenson, Robert K. Gabel, David A. Huddleston
  • Patent number: 5006261
    Abstract: Water-dispersible polymeric latexes are excellent paint detackifying agents for treating the circulating water in paint spray booths when latexes have an average particle size less than 10 microns.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: April 9, 1991
    Assignee: Nalco Chemical Company
    Inventors: Shu-Jen W. Huang, Claudia V. Stenger
  • Patent number: 4999126
    Abstract: A method of removing acrylic paints from the surfaces of paint spray booths which comprises the steps of(A) Coating the painted surfaces of paint spray booths with a thickened aromatic solvent paint stripper consisting essentially of:______________________________________ Ingredients % by Weight ______________________________________ Aromatic solvent 90-95 Fumed silica having a specific 1-4 surface area of at least 100 m.sup.2 /g Oil-soluble surfactant having an 3-6 HLB not greater than 12 ______________________________________(B) Allowing the stripper to contact the paint for a period of time sufficient to cause it to be dissolved from the surface; and then,(C) Removing the paint and stripper by means of water washing.These compositions are useful in removing acrylic paints from paint spray booths.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: March 12, 1991
    Assignee: Nalco Chemical Company
    Inventor: Robert J. Meade
  • Patent number: 4994390
    Abstract: A method of attacking and removing microbial slime in slime covered surfaces and maintaining a slime-free surface as in exposed cooling tower surfaces and in waste water treatment and paper making. This method comprises utilizing an enzyme blend in 2 to 100 parts per million (ppm) of cellulase, alpha-amylase and protease. Such enzyme blends have been found specifically to digest microbial slime and reduce microbial attachment and biofilm. A specific combination of polysaccharide degrading enzymes is a ratio of 2 parts cellulase to 1 alpha-amylase to 1 protease utilized in 2-100 parts per million. Broadly, the alpha-amylase must be at least 1 and the protease may vary from 0.5 to 1 part.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: February 19, 1991
    Assignee: Nalco Chemical Company
    Inventor: Christopher L. Wiatr
  • Patent number: 4992209
    Abstract: The method of adding to a nitrite corrosion inhibitor composition an effective amount of a bromosulfamate which is stable with respect to the nitrite corrosion inhibitor and provides an effective biocide, bactericide and fungicide. The composition using this bromosulfamate component to nitrite is utilized at about 0.1 to 10 ppm (residual) with an optimum of about 0.2 ppm of bromosulfamate. The bromosulfamate composition comprises reacting together sodium bromide (NaBr), sodium hypochlorite (NaOCl) or chlorine, and sodium sulfamate (NaSO.sub.3 NH.sub.2) or sulfamic acid, and using the product "fresh" in treating the nitrite solution.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: February 12, 1991
    Assignee: Nalco Chemical Company
    Inventors: Eugene B. Smyk, Chris R. Smyrniotis, Christopher L. Wiatr
  • Patent number: 4963497
    Abstract: The present invention is the isolation and purification of a newly discovered gene of the AIDS virus, HTLV-III, which encodes a protein which is immunogenic and recognized by sera of some HTLV-III seropositive people. Furthermore, the gene is highly conserved among all known HTLV-III isolates and exhibits a polymorphism at the 3' end which distinguishes molecular clones of the HTLV-III cell line from viral genomes of related viruses (i.e., other HTLV-III isolates, LAV, ARV, etc.).
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: October 16, 1990
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Flossie Wong-Staal, Pranab K. Chanda, John Ghrayeb
  • Patent number: 4954547
    Abstract: Fatty acids of fatty alkanolamides improve the shear stability of water-in-oil emulsions of acrylic acid polymers. Other advantages are afforded when fatty acids are used with these emulsions.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: September 4, 1990
    Assignee: Nalco Chemical Company
    Inventor: Merle L. Branning
  • Patent number: 4936994
    Abstract: A method of attacking and removing microbial slime in slime covered surfaces and maintaining a slime-free surface as in exposed cooling tower surfaces and in waste water treatment and paper making. This method comprises utilizing an enzyme blend in 2 to 100 parts per million (ppm) of cellulase, alpha-amylase and protease. Such enzyme blends have been found specifically to digest microbial slime and reduce microbial attachment and biofilm. A specific combination of polysaccharide degrading enzymes is a ratio of 2 parts cellulase to 1 alpha-amylase to 1 protease utilized in 2-100 parts per million. Broadly, the alpha-amylase must be at least 1 and the protease may vary from 0.5 to 1 part.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: June 26, 1990
    Assignee: Nalco Chemical Company
    Inventor: Christopher L. Wiatr
  • Patent number: 4931318
    Abstract: Colloidal silica prevents the interaction of cationic softeners and water-soluble polymers which are present in the manufacture of fiberglass mats.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: June 5, 1990
    Assignee: Nalco Chemical Company
    Inventors: John A. Romberger, Robert D. Jones, Richard P. Carr
  • Patent number: 4929424
    Abstract: A method of inhibiting the corrosion of the metal surfaces of beer pasteurizing units in contact with halogenated water vapor which comprise treating these halogenated waters with at least 1/4 ppm sulfamic acid for each ppm of halogen present in these waters.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: May 29, 1990
    Assignee: Nalco Chemical Company
    Inventors: Daniel A. Meier, Michael J. Groshans
  • Patent number: 4925799
    Abstract: A plasmid cloning vector containing both transcriptional and translational regulatory sequences derived from the bacteriophage lambda genome was constructed to achieve high level expression of prokaryotic and eukaryotic genes. The system utilizes a plasmid vehicle carrying the strong, regulatable lambda promoter, P.sub.L, and host lysogens into which this vector can be stabily transformed. The lysogen synthesizes sufficient repressor (cI) to control P.sub.L expression and thereby stabilize plasmids which carry such a highly efficient promoter. Use of a temperature sensitive repressor permits simple, rapid induction of P.sub.L transcripts at any given time. Efficient transcription of essentially any coding sequence is assured by providing the phage lambda antitermination factor, N, and a site on the transcription unit for its utilization (Nut site). This pAS1 plasmic closely resembles the earlier constructed pKC30cII, also a regulatory protein which activates promoters for lysogenic development.
    Type: Grant
    Filed: January 16, 1986
    Date of Patent: May 15, 1990
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventor: Martin Rosenberg
  • Patent number: 4925931
    Abstract: N-Homocysteine thiolactonyl retinamido cobalamin is useful for decreasing the induction of chemically-induced tumors in animals. It is also useful for inhibiting weight gain.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: May 15, 1990
    Inventor: Kilmer S. McCully
  • Patent number: 4915859
    Abstract: A drawing and stamping extreme pressure lubricant for steel and aluminum which comprises a water-in-oil micro-emulsion which consists essentially of about 2 to 30 percent of a 500 to 3,000 s.u.s. hydrocarbon oil and suitable emulsifiers and stabilizers used as the base for the emulsion including tall oil fatty acids, triethanolamine soaps, petroleum sulfonates, and non-ionic emulsifiers. By substituting an ethoxylated vegetable oil, such as caster oil, etc., for the hydrocarbon oil in the above formulation, a second extreme pressure lubricant is arrived at. Thus, this lubricant consists of 2 to 30 percent of an oxidized vegetable oil polymer where the oxidized portion is 4 to 30 moles selected from a group consisting of ethylene oxide (EO), propylene oxide (PO), and ethylene/propylene oxide (EO/PO) units of vegetable oil.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: April 10, 1990
    Assignee: Nalco Chemical Company
    Inventors: E. Michael Kerr, Bernard R. Szyszko
  • Patent number: 4907576
    Abstract: An orthopaedic belt apparatus applicable to any one of several parts of the body consisting of an elastomeric section sized to encompass lumbar muscle groups of the body wearing the orthopaedic belt and having distal ends thereof, a pair of non-stretch sections of generally rectangular configuration, each section having a first end and a second end, the first end of each section in securement to a distal end of the elastomeric section and the second end of each section sized to be at the front of the body but not meeting the other section's second end when the orthopaedic belt is placed around a portion of the body, a pull strap in selective securement to the second ends of the sections for urging the elastomeric section of the orthopaedic belt into tensioned engagement with the lumbar muscle groups, a foamatitious layer of material interposed between the orthopaedic belt and adjacent body portions, and a three dimensional pad member disposed between the foamatitious layer material and the elastomeric section
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: March 13, 1990
    Inventor: James D. Curlee
  • Patent number: 4891195
    Abstract: A method of improving the SO.sub.2 scrubbing efficiency of flue gas desulfurization scrubbers which comprises treating the scrubbers during the scrubbing operations with a dibasic carboxylic acid and an oil-soluble surfactant combined in a weight ratio of at least 1:3.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: January 2, 1990
    Assignee: Nalco Chemical Company
    Inventor: Mei-Jan L. Lin
  • Patent number: 4872999
    Abstract: A method for the control of marine fouling in salt or brackish water by a combination of a chlorine solution and a bromide salt such as an alkali metal bromide and about 1-10% of a biodispersant. In the preferred embodiment, the bromide salt is combined with a chlorine solution in the ratio of about 0.25 to about 1.25 equivalents.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: October 10, 1989
    Assignee: Nalco Chemical Company
    Inventors: Ronald H. Schild, Sandra Koeplin-Gall, Gregory C. Broxterman
  • Patent number: 4873192
    Abstract: The present invention discloses several DNA mutagenesis processes using a DNA template containing several uracil residues in place of thymine, which can be applied without selection techniques to produce altered DNA sequences with approximately 10-fold greater efficiency than current methods of site-specific mutagenesis.This template has relatively normal coding potential in the in vitro reactions typical of standard site-directed mutagenesis protocols but is not biologically active upon transfection into a wild type (i.e., ung.sup.+) E. coli host cell. Expression of a desired change, present in the newly synthesized non-uracil-containing covalently closed circular complementary strand, is thus favored. The procedure has been applied to mutations introduced via both obligonucleotides and error-prone polymerization. The inclusion of two additional simple treatment steps before transfection results in a site-specific mutation frequency approaching 100%.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: October 10, 1989
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventor: Thomas A. Kunkel
  • Patent number: 4842716
    Abstract: An improved method for reducing fouling and corrosion of ethylene cracking furnaces petroleum feedstocks, the improvement comprising treating the petroleum feed stock with at least 10 ppm of a combination of a phosphorous antifoulant compound and a filming inhibitor. The antifoulant compound is chosen from the group consisting of phosphite esters, phosphate esters, thiophosphite esters, thiophosphate esters and mixtures thereof, said esters being characterized by the formulas ##STR1## where X equals S or O, and R.sub.1, R.sub.2, and R.sub.3, are each independently selected from the group consisting of hydrogen, water soluble amine, alkyl, aryl, alkaryl, cycloalkyl, alkenyl, and aralkyl group provided that in at least one and not more than two of each R.sub.1, R.sub.2, and R.sub.3 are water soluble amines having partition coefficients greater than 1.0 mixed with a filming amount of at least 2-20 ppm imidazoline filming inhibitor prepared preferably from naphthenic or fatty acids and poly amines.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: June 27, 1989
    Assignee: Nalco Chemical Company
    Inventors: Morris Kaplan, John C. Kisalus