Patents Represented by Attorney, Agent or Law Firm William L. Krayer
  • Method and device for slotting well casing and scoring surrounding rock to facilitate hydraulic fractures
    Patent number: 5564499
    Abstract: Linear apertures are created in well casing through the use of linear charges lowered into the well casing in place; hydraulic fracturing conducted through the linear apertures achieves larger and less dissipated fractures than conventional small circular perforations which generate near well bore tortuosity. The linear charges can also be used in open bores and in overbalance perforating.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: October 15, 1996
    Inventors: Roger B. Willis, Phillip M. Halleck, William P. Stoner
  • Square container for hazardous powdered materials
    Patent number: 5555995
    Abstract: A child-protected thermoplastic container having a generally square shape including a closure having horizontal sealing surfaces complimentary to sealing surfaces on the top of parallel container sides, and including tapered guide surfaces on the parallel sides to guide the closure from back to front for closing while forcing a tight seal on the sealing surfaces. The front of the closure is provided with a handle which snaps closed to effectuate a tight seal on the front, which must be opened before the closure will slide back to open the container.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: September 17, 1996
    Inventor: Herbert W. Galer
  • Pulverizer throat assembly
    Patent number: 5549251
    Abstract: A kit of segments is provided for replacing the throat of a coal pulverizer. The segments are so constructed that they may be assembled as either a rotatable throat or a stationary throat, and easily converted in place from one mode to the other. In the rotatable mode, the ledge covers over the throat segments are rotated with the throat.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: August 27, 1996
    Inventor: Robert S. Provost
  • Method of making ketoisophorone via oxidation of isophorone with tert-butyl hydroperoxide
    Patent number: 5545761
    Abstract: A method of manufacturing 2,6,6-trimethyl-2-cyclohexen-1,4-dione (ketoisophorone) from 3,5,5-trimethyl-2-cyclohexenone (alpha-isophorone). The alpha-isophorone is reacted with hydroperoxide in a solvent, and in the presence of a metal catalyst. The reaction converts the alpha-isophorone directly to ketoisophorone without the intermediate isomerization of alpha-isophorone to beta-isophorone (3,5,5-trimethyl-3-cyclohexenone).
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: August 13, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Bryan T. Dawson, Joseph Pugach
  • Laminating resins having low organic emissions
    Patent number: 5534211
    Abstract: A method of laminating a solid formed body utilizing a laminating resin characterized by low volatile emissions is made from (1) an unsaturated polyester resin comprising maleic acid, phthalic acid, glycol(s), and dicyclopentadiene, (2) a diacrylate or dimethacrylate of alkoxylated bisphenol-A, and (3) a compound selected from the group consisting of ethylene glycol dimethacrylate, vinyl toluene, styrene, and divinyl benzene.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: July 9, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Thomas W. Smeal, George L. Brownell
  • Manufacture of neopentyl glycol (IV)
    Patent number: 5532417
    Abstract: Neopentyl glycol is made from isobutyraldehyde and formaldehyde. The formaldehyde may be in the form of paraformaldehyde or aqueous formaldehyde. The aldol reaction product is mixed with a lower alcohol prior to hydrogenation to promote hydrogenolysis and allow recovery of high purity product by simple distillation. In a less preferred mode, the alcohol may be added after hydrogenation, resulting in a smaller improvement over previous processes.
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: July 2, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Jeffrey S. Salek, Joseph Pugach, Carole L. Elias, Leonard A. Cullo
  • Process of making acrylic-filled thermoformable acrylic sheet
    Patent number: 5530041
    Abstract: A monomer-rich acrylic syrup is cast including about 10% to about 20% ground acrylic particles. During curing, the particles absorb over half their weight in monomer, and a cured sheet is formed in which the matrix monomer and uncrosslinked polymer form a phase which extends through the particles, while the particles appear to be fused together. Including a crosslinker in the syrup further insures the interpenetration of the matrix phase into the swollen particles. A textured surface is formed, which is useful as an anti-slip surface in bathtubs and shower stalls, after thermoforming.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: June 25, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Ettore Minghetti, John E. Eitel
  • Acrylic sheet having uniform distribution of coloring and mineral filler before and after thermoforming
    Patent number: 5521243
    Abstract: Ranges of chain-transfer agents, thixotropic agents, and alumina trihydrate content are balanced to minimize migration or maldistribution of coloring matter and alumina trihydrate during curing of methyl methacrylate in a syrup including polymethylmethacrylate and also during subsequent heating and deformation in thermoforming, to achieve constancy of impact resistance and improve stability of patterns even in deformed portions of formed sheets.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: May 28, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Ettore Minghetti, John E. Eitel, Carol A. Wetter
  • Nickel and cobalt containing hydrotalcite-like materials having a sheet-like morphology and process for production thereof
    Patent number: 5518704
    Abstract: A synthetic nickel (or cobalt) containing hydrotalcite-like material having a sheet-like morphology and a sheet broadness to thickness ratio of at least 50 and a formula M.sub.1-x Al.sub.x (OH).sub.2 .multidot.xA.multidot.mH.sub.2 O where M is Ni or Co, A is a mono carboxylic anion of the form RCOO.sup.- where R is C.sub.n H.sub.2n+1 and n=0-5, and x and m are numbers satisfying the following conditions:0.2<=x<=0.40.0<=m<=4It is made by starting with a synthesis mixture having Ni or Co (divalent cation) to aluminum (trivalent cation) molar ratio between 1:1 and 10:1, mono carboxylic anion to aluminum (trivalent cation) molar ratio between 0.1:1 to 1.2:1 and optionally added other anions. The process comprises of reacting a mixture comprising nickel (or cobalt) and aluminum cations and mono carboxylic anions in an aqueous slurry at a temperature of at least 40.degree. C. and a pH of at least 7.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: May 21, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Chandrashekhar P. Kelkar, Alain A. Schutz, Leonard A. Cullo
  • Method of making a mold
    Patent number: 5515903
    Abstract: A method is disclosed for making molds for use in injection molding wherein a cement replica is made of a pattern by curing the cement in a silicon rubber negative of the pattern, then pouring molten zinc or zinc alloy into a frame containing the cement replica. The cooling of the mold metal is controlled by the direct application of flame and frequent adjustments of clamps which firmly contact the mold to a solid surface.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: May 14, 1996
    Assignee: Multi-Products, Incorporated
    Inventors: John J. Hronas, Michael J. Hronas
  • Basic inorganic binders
    Patent number: 5507980
    Abstract: The present invention relates to a process for making novel catalysts, catalyst supports, and adsorbers comprising synthetic hydrotalcite-like binders, having a sheet-like morphology and a sheet broadness to thickness ratio of at least 50 and a formula Mg.sub.1-x Al.sub.x (OH).sub.2.xA.sup.-. mH.sub.2 O where A.sup.- is a mono carboxylic anion of the form RCOO.sup.- where R is C.sub.n H.sub.2n+1 and n=0-5, and x and m are numbers satisfying the following conditions:0.2<=x<=0.40.0<=m<=4This hydrotalcite-like material is combined with an inorganic material to form shapes which have good mechanical strength. The process includes starting with a synthesis mixture having magnesium (divalent cation) to aluminum (trivalent cation) molar ratio between 1:1 and 10:1, mono carboxylic anion to aluminum (trivalent cation) molar ratio between 0.1:1 to 1.2:1 and optionally added other anions.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: April 16, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Chandrashekhar P. Kelkar, Alain A. Schutz, Leonard A. Cullo
  • Esterification process using a titamium zeolite catalyst
    Patent number: 5502240
    Abstract: A liquid phase esterification process is described wherein the esterification catalyst is a titanium zeolite.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: March 26, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Joseph Pugach, Thomas W. Smeal, Howard S. Karp
  • Laminating resins having low organic emissions
    Patent number: 5501830
    Abstract: A laminating resin is made from (1) an unsaturated polyester resin, (2) a diacrylate or dimethacrylate of alkoxylated bisphenol-A, and (3) vinyl toluene. The resin requires no styrene to achieve excellent laminating resin properties, and is significantly inhibited from emitting volatiles during use.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: March 26, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Thomas W. Smeal, George L. Brownell
  • Laminating resins having low organic emissions (II)
    Patent number: 5500171
    Abstract: A laminating resin is made from (1) an unsaturated polyester resin comprising maleic acid, phthalic acid, and glycol(s), (2) a diacrylate or dimethacrylate of alkoxylated bisphenol-A, and (3) ethylene glycol dimethacrylate. The resin requires no styrene to achieve excellent laminating resin properties, and is significantly inhibited from emitting volatiles during use.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: March 19, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Thomas W. Smeal, George L. Brownell
  • Method of making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane
    Patent number: 5493060
    Abstract: This invention provides a unique method of producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane ("BPTMC"). The disclosed method manufactures BPTMC from ketals and hemithioketals of 3,3,5-trimethylcyclohexanone ("TMC"). The reaction takes place in the presence of an acid catalyst, and optionally added co-catalysts. Additionally, applicants have disclosed a particularly useful method of manufacturing BPTMC from TMC and alcohol and/or thiol starting materials. These starting materials react to form the TMC ketal or thioketal materials. This method is particularly useful in that it allows recovery and recycling of the alcohol and/or thiol.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: February 20, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Mark R. Rubino, Jeffrey S. Salek
  • Laminating resins having low organic emissions
    Patent number: 5492668
    Abstract: A laminating resin is made from (1) an unsaturated polyester resin, (2) a diacrylate or dimethacrylate of alkoxylated bisphenol-A, and (3) styrene, divinyl benzene or a combination thereof. The resin achieves excellent laminating resin properties, and is significantly inhibited from emitting volatiles during use.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: February 20, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Thomas W. Smeal, George L. Brownell
  • Catalyst system for adherent rigid foam
    Patent number: 5482648
    Abstract: An isocyanate composition is made by using a 2-component catalyst system--one which initiates at room temperature and one which initiates at a temperature of at least 75.degree. C. and has a one-hour half-life temperature of at least 90.degree. C.; the composition has a room temperature stability of at least thirty days.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: January 9, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Keith A. Borden, David S. Jensen, Robert E. Anderson
  • Catalyst system for adherent rigid foam
    Patent number: 5447921
    Abstract: A thermosetting unsaturated polyester-polyurethane hybrid foam resin composition is made without significant blistering by using a 2-component catalyst system--one which initiates at room temperature and one which initiates at a temperature of at least 75.degree. C. and has a one-hour half-life temperature of at least 90.degree. C.; the composition has a room temperature stability of at least thirty days.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: September 5, 1995
    Assignee: Aristech Chemical Corporation
    Inventors: Keith A. Borden, David S. Jensen, Robert E. Anderson
  • Method of making plasticizers
    Patent number: 5434294
    Abstract: A process for the titanate catalyzed preparation of plasticizers from polycarboxylic acids and alcohols which minimizes waste water and is energy efficient. The reaction product is treated with aqueous caustic and is then filtered using an absorbent medium which removes titanium, caustic, acid salts and water. The need for water washing is obviated, and the final plasticizer product has excellent properties.
    Type: Grant
    Filed: April 4, 1994
    Date of Patent: July 18, 1995
    Assignee: Aristech Chemical Corporation
    Inventors: Joseph Pugach, Thomas W. Smeal
  • Hydrocarbon gels useful in formation fracturing
    Patent number: 5417287
    Abstract: This invention relates to improved hydrocarbon gels which find use in the fracturing of petroleum producing formations. In particular it relates to the use of a defined class of gelling agents for hydrocarbons which provide excellant results in such fracturing. The gelling agents comprise combinations of ferric salts and selected orthophosphate esters.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: May 23, 1995
    Assignee: Clearwater, Inc.
    Inventors: Kevin W. Smith, Leonard J. Persinski