Patents Represented by Attorney Donald M. MacKay
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Patent number: 4845238Abstract: An epoxy group-containing disilazane having the formula, ##STR1## wherein A is ##STR2## is described. Also described is a process for producing the epoxy group-containing disilazane. The process comprises reacting a disilazane having the formula, ##STR3## with an epoxy compound selected from a group consisting of allyl glycidyl ether and vinylcyclohexene oxide in the presence of a platinum-type catalyst.Type: GrantFiled: September 28, 1987Date of Patent: July 4, 1989Assignee: Toray Silicone Co., Ltd.Inventor: Akihiko Shirahata
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Patent number: 4769230Abstract: Arsenic acid is formed from arsenous acid and water under oxygen pressure with catalytic amounts of nitric acid and a halide whereby the nitric oxide by-product is regenerated to nitric acid for contact with fresh arsenous acid.Type: GrantFiled: August 2, 1982Date of Patent: September 6, 1988Assignee: Koppers Company, Inc.Inventors: Nicholas P. Greco, Byung K. Ahn, John J. Kozak
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Patent number: 4742663Abstract: Wooden beams containing concealed load distribution means embedded therein are disclosed herein. The wooden beams may be either laminated or unitary. The load distribution means is comprised of an elongated member suitably adapted such that loads exerted on the elongated member are therefrom transmitted to and more evenly distributed within the wooden beam.Type: GrantFiled: May 7, 1981Date of Patent: May 10, 1988Assignee: Koppers Company, Inc.Inventor: Harlan J. Demers
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Patent number: 4732320Abstract: A railroad crossing is provided in which gage, transverse end, and outer field panels are joined by means of splines fitted into indentations on side surfaces of the panels whereby pairs of panels are joined together with a spline fitting partly into each side or end of adjoining panels; and lateral anchor members for fixing the panels adjacent to said rails, the end panels and the outer field panels whereby the need is obviated for affixing the panels to the ties by means of surface spikes.Type: GrantFiled: May 15, 1986Date of Patent: March 22, 1988Assignee: Koppers Company, Inc.Inventor: S. Hudson Owen
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Patent number: 4705879Abstract: Alkylresorcinol phosphites useful as antioxidants in lubricants and greases are provided of the formula: ##STR1## wherein R is selected from H and alkyl, and R.sup.1 is an alkyl, said alkyl having from 8 to 18 carbon atoms and consisting of at least 75% secondary alkyl.Type: GrantFiled: January 13, 1986Date of Patent: November 10, 1987Assignee: Koppers Company, Inc.Inventor: Hans Dressler
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Patent number: 4679658Abstract: A gaff is provided for use in climbing a wooden utility pole (to include trees), said gaff having one or more grooves preferably running along a line parallel to the line formed by the intersection of the planes of its top two sides and/or one or more teeth for cutting into the pole.Type: GrantFiled: July 5, 1985Date of Patent: July 14, 1987Assignee: Koppers Company, Inc.Inventor: Harlan Demers
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Patent number: 4663143Abstract: A ternary alloy comprised of cerium, nickel and manganese is characterized in having CaCu.sub.5 hexagonal crystal structure and stoichiometry. Members of a preferred class of compounds, represented by the empirical formula CeNi.sub.5-x Mn.sub.x wherein "x" has a value between 0.1 and about 1.0. These alloys react with hydrogen readily and can absorb a large amount of hydrogen at moderate pressure and temperature and are particularly suitable for use as hydrogen storage materials.Type: GrantFiled: December 21, 1983Date of Patent: May 5, 1987Assignee: Koppers Company, Inc.Inventors: William E. Wallace, Faiz Pourarian
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Patent number: 4661378Abstract: A novel composition for treating asphalt and concrete surfaces is provided formed of a mixture of topped coke oven tar, an aromatic solvent having an API Gravity@ 60.degree. F. of 11-30, Specific Gravity 60.degree./60.degree. F. of from 0.876-0.993, Distillation Range .degree. F. of 310-450 IBP (initial boiling point) to 350-550 DP (dry point), and a Flash pt. .degree. F. TCC of 110-250; and a bituminous pavement rejuvenator which is a composition derived from coal tar and comprises a mixture of di-, tri- and tetracyclic aromatic compounds and their alkyl homologs containing lower alkyl groups together with a significant amount of phenolic and hydroxy derivatives and having a specific gravity at 25.degree./25.degree. C. of at least 1.08, an initial boiling point of at least 180.degree. C., and a continuous boiling range to at least 300.degree. C., 70-40% by volume of the material remaining as residue at 300.degree. C., and the distillate to 300.degree. C. having a minimum specific gravity at 25.degree./25.Type: GrantFiled: July 23, 1985Date of Patent: April 28, 1987Assignee: Koppers Company, Inc.Inventor: Edward W. McGovern
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Patent number: 4656023Abstract: Hydrogen storage materials are provided by a quaternary alloy of the formula:Zr.sub.1-x Ti.sub.x CrFe.sub.ywherein x has a value in a range from 0.1 to 0.3, and y has a value in a range from 1.2 to 1.4, and their hydrides.Type: GrantFiled: June 14, 1985Date of Patent: April 7, 1987Assignee: Koppers Company, Inc.Inventors: William E. Wallace, Gui-Yu Yu
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Patent number: 4633022Abstract: 2,6-dialkyl substituted phenols such as 2,6-ditertiary butylphenol are reacted with formaldehyde in methyl alcohol in the presence of an inert gas and a tertiary amine catalyst to produce a bis(3,5-di-t-butyl-4-hydroxybenzyl)ether; and the bis ether subjected to hydrogenolysis in the presence of a catalyst, a solvent and an amine to prepare a trisubstituted phenol such as 2,6-di-t-butyl-4-methyl-phenol.Type: GrantFiled: September 16, 1985Date of Patent: December 30, 1986Assignee: Koppers Company, Inc.Inventor: Nicholas P. Greco
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Patent number: 4604491Abstract: Synthetic base oils for functional fluids and greases are provided comprising a mixture of monoalkylated naphthalenes and polyalkylated naphthalenes, said naphthalenes represented by the formula: ##STR1## wherein the R' groups are independently selected from H and methyl, the monoalkylated naphthalenes have three R groups which are H and one R group which is a 12-26 carbon alkyl, the polyalkylated naphthalenes have from two to four R groups which are 12-26 carbon alkyl and any remainder R groups H, and the weight ratio of monoalkylated naphthalenes to polyalkylated naphthalenes is from 5:95 to 70:30 when the average alkyl group is C.sub.12 -C.sub.16 and from 5:95 to 99:1 when the average alkyl group is C.sub.17 -C.sub.26. In the preferred mixture, the polyalkylated naphthalenes have a numerical ratio of .alpha./.beta. substitution of from 50/50 to 10/90 when the R' groups are both H.Type: GrantFiled: November 26, 1984Date of Patent: August 5, 1986Assignee: Koppers Company, Inc.Inventors: Hans Dressler, Albert A. Meilus
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Patent number: 4600784Abstract: A process is disclosed for one-step preparation of substituted tetrathiafulvalenes by reaction of carbon disulfide with acetylenic compounds under pressures of at least about 1,000 atmospheres. Substituted tetrathiafulvalenes made by this process are particularly useful as precursors to very pure tetrathiafulvalene, a compound which can complex with tetracyano-p-quinodimethane to form a charge-transfer salt having very high electrical conductivity.Type: GrantFiled: December 27, 1985Date of Patent: July 15, 1986Assignee: Koppers Company, Inc.Inventors: Yoshiyuki Okamoto, Joseph E. Rice
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Patent number: 4599464Abstract: Novel compositions useful as antioxidants are formed by the reaction of resorcinol with an alkenylbenzene.Type: GrantFiled: October 17, 1985Date of Patent: July 8, 1986Assignee: Koppers Company, Inc.Inventor: Hans Dressler
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Patent number: 4592783Abstract: Rust preventives are provided comprising divalent metal salts of the formula: ##STR1## wherein the R groups are independently selected from methyl, hydrogen, and decyl of the formula: ##STR2## wherein n=0 to 3; and wherein from two to three R groups are decyl, zero to two R groups are methyl, and zero to two R groups are hydrogen; and M is a divalent metal selected from Mg, Ca, Ba, and Zn. Useful intermediates for preparing the said rust preventives are also provided.Type: GrantFiled: October 22, 1984Date of Patent: June 3, 1986Assignee: Koppers Company, Inc.Inventors: Hans Dressler, Samuel N. Holter, Nancy Znidarsic
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Patent number: 4567032Abstract: Hydrogen storage materials are provided of a ternary alloy of the formula:ZrMnFe.sub.xwherein x has a value from 1.2 to 1.3, and their hydrides.Type: GrantFiled: June 5, 1985Date of Patent: January 28, 1986Assignee: Koppers Company, Inc.Inventors: William E. Wallace, Gui Y. Yu
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Patent number: 4556551Abstract: An alloy consisting of zirconium, chromium, iron and optionally titanium is characterized in having C14 hexagonal crystal structure and ZrCr.sub.2 stoichiometry. Members of a preferred class of compounds, represented by the empirical formula Zr.sub.1-x Ti.sub.x Cr.sub.2-y Fe.sub.y wherein "x" has a value between 0.0 and 0.9 and "y" has a value of 0.1 to 1.5, are particularly suitable for use as hydrogen storage materials.Type: GrantFiled: March 22, 1984Date of Patent: December 3, 1985Assignee: Koppers Company, Inc.Inventors: William E. Wallace, Faiz Pourarian
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Patent number: 4512965Abstract: Quaternary hyperstoichiometric alloys of the formula: ZrCrFeT.sub.x and their hydrides are provided, characterized as having MgZn.sub.2 hexagonal crystal structure wherein T is selected from Mn, Fe, Co, Ni and Cu, and X is a number from 0.1 to 1.0. These alloys readily form hydrides at low hydrogen pressure and are suitable for use as hydrogen storage materials.Type: GrantFiled: November 21, 1983Date of Patent: April 23, 1985Assignee: Koppers Company, Inc.Inventors: William E. Wallace, Faiz Pourarian
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Patent number: 4487669Abstract: A method of oxidizing an element in both compartments of an electrolytic cell is provided. The method comprises reducing O.sub.2 to H.sub.2 O.sub.2 in the cathodic compartment with a reducing agent such as a cobalt porphyrin, cobalt phthalocyanine, or hydroquinone, and oxidizing the element in both compartments preferably in the presence of a halide. Yields of up to 200 percent are obtainable.Type: GrantFiled: January 31, 1983Date of Patent: December 11, 1984Assignee: Koppers Company, Inc.Inventor: Theodore Kuwana
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Patent number: 4466998Abstract: Water-borne preservative salts are used to impregnate wood by the empty-cell pressure impregnation method without the precipitation of water-borne salts such as chromium, copper and arsenic when wood sugars enter the treating solution during the kickback or pressure release phase of the empty-cell cycle. The lack of precipitation is obtained by maintaining the preservative salts solution at a temperature between about 40.degree. F. and about 70.degree. F.Type: GrantFiled: June 16, 1982Date of Patent: August 21, 1984Assignee: Koppers Company, Inc.Inventors: Craig R. McIntyre, Daniel A. Eakin
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Patent number: 4465845Abstract: A process is disclosed for one-step preparation of sulfur-selenium fulvalenes by reaction of an acetylenic compound with carbon selenide sulfide or with a mixture of carbon diselenide and carbon disulfide under pressures of at least about 1,000 atmospheres. Fulvalene compounds made by the process are characterized in having at least one sulfur atom and at least one selenium atom in the ring structure of the fulvalene compound. Substituted diselenadithiafulvalenes made by this process are precursors to very pure diselenadithiafulvalene which is useful in preparing charge-transfer salts.Type: GrantFiled: April 26, 1982Date of Patent: August 14, 1984Assignee: Koppers Company, Inc.Inventors: Yoshiyuki Okamoto, Piotr S. Wojciechowski