Patents by Inventor Donald D. Norwood
Donald D. Norwood 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).
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Patent number: 5401820Abstract: In one embodiment of this invention a surface silicated alumina composition, as opposed to conventional silica alumina, is provided. Such composition may also be fluorided and/or phosphated or phosphited. The resulting compositions are broadly useful but are of particular applicability as supports for chromium olefin polymerization catalysts. In another aspect alumina is fluorided and used with hexavalent chromium catalyst and a co-catalyst or in the alternative with an organochromium catalyst. If desired the support in this embodiment can also be phosphated or phosphited. In another embodiment, aluminum phosphate is formed in the pores of alumina. In contrast with alumina catalyst supports of the prior art, the supports of this invention allow for the production of olefin polymers at high rates of productivity. Also novel high density ultrahigh molecular weight polymers are produced.Type: GrantFiled: December 18, 1992Date of Patent: March 28, 1995Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Paul D. Smith, Donald D. Norwood
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Patent number: 5063600Abstract: A computer system used with special input hardware for providing the benefits of computerization to handwritten as well as keyboard entered information to meet a wide spectrum of commonly-occurring, written information processing needs. The input hardware consists of a transparent digitizing tablet mounted atop a flat panel display screen such that a user can handwrite directly upon the display screen with an attached pen. Application program functions include appointment documentation and work scheduling, handwritten or text file creation and manipulation, author-to-typist liaison functions for document production, handwritten annotation to text, handwritten note creation from text, and text document creation from handwritten source material.Type: GrantFiled: May 14, 1990Date of Patent: November 5, 1991Inventor: Donald D. Norwood
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Patent number: 5037911Abstract: In one embodiment of this invention a surface silicated alumina composition, as opposed to conventional silica alumina, is provided. Such composition may also be fluorided and/or phosphated or phosphited. The resulting compositions are broadly useful but are of particular applicability as supports for chromium olefin polymerization catalysts. In another aspect alumina is fluorided and used with hexavalent chromium catalyst and a co-catalyst or in the alternative with an organochromium catalyst. If desired the support in this embodiment can also be phosphated or phosphited. In another embodiment, aluminum phosphate is formed in the pores of alumina. In contrast with alumina catalyst supports of the prior art, the supports of this invention allow for the production of olefin polymers at high rates of productivity. Also novel high density ultrahigh molecular weight polymers are produced.Type: GrantFiled: November 17, 1988Date of Patent: August 6, 1991Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Paul D. Smith, Donald D. Norwood
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Patent number: 4820785Abstract: A catalyst system is produced by first forming a chromium catalyst on a predominantly silica support, activating in an oxygen-containing ambient and thereafter subjecting the thus activated composition to carbon monoxide reduction. The resulting reduced supported chromium catalyst composition is then precontacted with a cocatalyst selected from trialkyl boron compounds and dialkyl aluminum alkoxide compounds, preferably triethyl borane and thereafer contacted with ethylene. This results in a catalyst system which produces comonomer in situ so as to give tough, flexible ethylene copolymers from an essentially pure ethylene feed.Type: GrantFiled: February 24, 1988Date of Patent: April 11, 1989Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Douglas Klendworth, Donald D. Norwood, Eric T. Hsieh, Elizabeth A. Boggs
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Patent number: 4806513Abstract: In one embodiment of this invention a surface silicated alumina composition, as opposed to conventional silica alumina, is provided. Such composition may also be fluorided and/or phosphated or phosphited. The resulting compositions are broadly useful but are of particular applicability as supports for chromium olefin polymerization catalysts. In another aspect alumina is fluorided and used with hexavalent chromium catalyst and a co-catalyst or in the alternative with an organochromium catalyst. If desired the support in this embodiment can also be phosphated or phosphited. In another embodiment, aluminum phosphate is formed in the pores of alumina. In contrast with alumina catalyst supports of the prior art, the supports of this invention allow for the production of olefin polymers at high rates of productivity. Also novel high density ultrahigh molecular weight polymers are produced.Type: GrantFiled: May 29, 1984Date of Patent: February 21, 1989Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Paul D. Smith, Donald D. Norwood
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Patent number: 4773565Abstract: A valve structure including a valve body defining a valve chamber, a pair of annular inlet and outlet seal members, and a tapered valve member journaled in corresponding tapered sealing surfaces in the inlet and outlet seal members. Passages communicate respectively between a fluid source and the inlet passage, the outlet passage and the valve chamber. The maximum diametral dimensions of the valve passage through the valve member at its point of communication with the tapered surface of the valve member is less than the minimum width of the sealing surfaces of the seal members along the path traced by the valve passage as the valve member is rotated. A method of controlling passage of material through such a valve structure is also disclosed.Type: GrantFiled: April 5, 1985Date of Patent: September 27, 1988Assignee: Phillips Petroleum CompanyInventors: Raymond G. Rohlfing, Donald D. Norwood
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Patent number: 4773626Abstract: A valve structure including a valve body defining a valve chamber, a pair of annular inlet and outlet seal members, and a tapered valve member journaled in corresponding tapered sealing surfaces in the inlet and outlet seal member. Passages communicate respectively between a fluid source and the inlet passage, the outlet passage and the valve chamber. The maximum diametral dimensions of the valve passage through the valve member at its point of communication with the tapered surface of the valve member is less than the minimum width of the sealing surfaces of the seal members along the path traced by the valve passage as the valve member is rotated. A method of controlling passage of material through such a valve structure is also disclosed.Type: GrantFiled: December 2, 1983Date of Patent: September 27, 1988Assignee: Phillips Petroleum CompanyInventors: Raymond G. Rohlfing, Donald D. Norwood
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Patent number: 4767028Abstract: A rotating metering valve having a transverse passage which carries a slidable piston reciprocating once for each revolution of the valve for metering particulate material from an inlet port to an outlet port is provided with a dumbbell shaped piston and a purge fluid port in the transverse passage to ensure reliable operation, even while metering small quantities of particulate.Type: GrantFiled: January 15, 1988Date of Patent: August 30, 1988Assignee: Phillips Petroleum CompanyInventors: Raymond G. Rohlfing, Donald D. Norwood
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Patent number: 4735931Abstract: The catalyst system is produced by first forming a chromium catalyst on a predominantly silica support, activating in an oxygen-containing ambient and thereafter subjecting the thus activated composition to carbon monoxide reduction. The resulting reduced supported chromium catalyst composition is then precontacted with a cocatalyst selected from trialkyl boron compounds and dialkyl aluminum alkoxide compounds, preferably triethyl borane and thereafter contacted with ethylene. This results in a catalyst system which produces comonomer in situ so as to give tough, flexible ethylene copolymers from an essentially pure ethylene feed.Type: GrantFiled: June 16, 1986Date of Patent: April 5, 1988Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Douglas Klendworth, Donald D. Norwood, Eric T. Hsieh, Elizabeth A. Boggs
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Patent number: 4596862Abstract: Ethylene polymer is particularly suitable for the production of tough film is produced under slurry conditions using a fluorided aluminophosphate support and a reaction temperature within the range of 93.degree. to 107.degree. C. in the presence of hydrogen and a small amount of trialkyl boron cocatalyst wherein said aluminophosphate has a phosphorous to aluminum ratio within the very narrow range of 0.15 to 0.4 and wherein said aluminophosphate carrying chromium catalyst is being activated at a temperature within the range of 482.degree. to 704.degree. C. The resulting film is not only substantially superior to film made from the best of the readily available commercial resins but is also better than film made from polymers using a similar catalyst system without the specific combination of parameters of this invention.Type: GrantFiled: December 24, 1984Date of Patent: June 24, 1986Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Emory W. Pitzer, Elizabeth A. Boggs, Donald D. Norwood, Fay W. Bailey
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Patent number: 4312967Abstract: An olefin polymerization catalyst is provided comprising chromium oxide on a titanium-containing silica support having at least about 3 weight percent titanium in combination with an organoboron promoter. The titanium may be incorporated by coprecipitation with the silica gel or added anhydrously or nonanhydrously to the silica gel. The polymerization process comprises the contacting of olefin monomer with the titanium-containing chromium oxide catalyst in the presence of an organoboron promoter.Type: GrantFiled: February 6, 1980Date of Patent: January 26, 1982Assignee: Phillips Petroleum Co.Inventors: Donald D. Norwood, Jackie C. Watts
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Patent number: 4297445Abstract: A method for continuous production of block copolymers having a block of propylene homopolymer and blocks of polymer of ethylene. The block copolymers produced thereby. In a first stage a first reaction mixture containing a polymer of ethylene is produced with continuous transfer of a portion of this reaction mixture along with propylene monomer and a catalyst modifier into a second stage in which a block copolymer having a block of propylene homopolymer and blocks of polymer of ethylene is produced. In preferred embodiments the polymer of ethylene is ethylene homopolymer and/or ethylene-propylene random copolymer.Type: GrantFiled: September 28, 1979Date of Patent: October 27, 1981Assignee: Phillips Petroleum Co.Inventors: James N. Short, Donald D. Norwood
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Patent number: 4281520Abstract: A pair of hollow modules, each containing a liquid refrigerant, are shaped to fit around the circumference, bottom and neck of a beverage bottle. The neck of the bottle protrudes from one end so that the beverage can be poured without removal from the cooler. The cooler has an inner curvature which fits the curvature of the largest diameter bottle to be accommodated. The modules are held together by a strap with loops at each end which fit around the pair of modules and into grooves or rings on the outer surface thereof.Type: GrantFiled: January 15, 1980Date of Patent: August 4, 1981Inventor: Donald D. Norwood
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Patent number: 4101722Abstract: A chromium-containing catalyst utilizing spray dried silica gel containing titanium is used to produce olefin polymers exhibiting an outstanding resistance to environmental stress cracking.Type: GrantFiled: February 4, 1977Date of Patent: July 18, 1978Assignee: Phillips Petroleum CompanyInventors: John P. Hogan, Donald D. Norwood
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Patent number: 4053436Abstract: A chromium-containing catalyst utilizing spray dried silica gel containing titanium is used to produce olefin polymers exhibiting an outstanding resistance to environmental stress cracking.Type: GrantFiled: August 26, 1975Date of Patent: October 11, 1977Assignee: Phillips Petroleum CompanyInventors: John P. Hogan, Donald D. Norwood
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Patent number: RE34476Abstract: A computer system used with special input hardware for providing the benefits of computerization to handwritten as well as keyboard entered information to meet a wide spectrum of commonly-occurring, written information processing needs. The input hardware consists of a transparent digitizing tablet mounted atop a flat panel display screen such that a user can handwrite directly upon the display screen with an attached pen. Application program functions include appointment documentation and work scheduling, handwritten or text file creation and manipulation, author-to-typist liaison functions for document production, handwritten annotation to text, handwritten note creation from text, and text document creation from handwritten source material.Type: GrantFiled: May 28, 1992Date of Patent: December 14, 1993Inventor: Donald D. Norwood