Patents Represented by Attorney Martin S. Baer
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Patent number: 4315880Abstract: Process for the manufacture of fibrous products by drawing at elevated temperature a sheet comprising sintered particles of a synthetic organic thermoplastic polymer, which sheet also contains 0.1 to 5 phr of a processing aid, being certain fatty acids or compounds thereof.Type: GrantFiled: May 1, 1980Date of Patent: February 16, 1982Assignee: Shell Oil CompanyInventor: Uiltje J. Veenstra
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Patent number: 4306047Abstract: A TiCl.sub.3 olefin polymerization catalyst component is prepared by reducing TiCl.sub.4 with an aluminum trihydrocarbyl compound in a molar ratio of Ti:Al of 2.7:1 to 4.0:1 in the presence of diisoamyl ether and a hydrocarbon solvent by gradually adding TiCl.sub.4 to the aluminum trihydrocarbyl compound and at least a substantial proportion of the diisoamyl ether at a temperature of from 15.degree. to 50.degree. C. during a period of from 0.7 to 2.5 hours to produce a precipitate of TiCl.sub.3, and thereafter converting the precipitate into active TiCl.sub.3 by heating at a temperature of from 80.degree. to 110.degree. C. during at least 30 minutes. The active TiCl.sub.3, when combined with a conventional organoaluminum cocatalyst, provides a stereospecific catalyst for the polymerization of alpha monoolefins having high activity, good morphology and good stereospecificity.Type: GrantFiled: October 17, 1980Date of Patent: December 15, 1981Assignee: Shell Oil CompanyInventors: Andras G. T. G. Kortbeek, Wilhelmina J. M. van der Linden-Lemmers
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Patent number: 4269732Abstract: A TiCl.sub.3 olefin polymerization catalyst component is prepared by reducing TiCl.sub.4 with an aluminum trihydrocarbyl compound in a molar ratio of Ti:Al of 2.7:1 to 4.0:1 in the presence of diisoamyl ether and a hydrocarbon solvent by gradually adding TiCl.sub.4 to the aluminum trihydrocarbyl compound and at least a substantial proportion of the diisoamyl ether at a temperature of from 15.degree. to 50.degree. C. during a period of from 0.7 to 2.5 hours to produce a precipitate of TiCl.sub.3, and thereafter converting the precipitate into active TiCl.sub.3 by heating at a temperature of from 80.degree. to 110.degree. C. during at least 30 minutes. The active TiCl.sub.3, when combined with a conventional organoaluminum cocatalyst, provides a stereospecific catalyst for the polymerization of alpha monoolefins having high activity, good morphology and good stereospecificity.Type: GrantFiled: July 17, 1979Date of Patent: May 26, 1981Assignee: Shell Oil CompanyInventors: Andras G. T. G. Kortbeek, Wilhelmina J. M. van der Linden-Lemmers
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Patent number: 4259466Abstract: A titanium trichloride-catalyzed process for stereospecific polymerization of alpha-olefins, particularly propylene, to produce polymers of relatively high bulk density comprises employing as the TiCl.sub.3 catalyst component, used with an aluminum alkyl cocatalyst, a 0.1 to 30 millimicron fraction of a TiCl.sub.3 composition produced by(a) reacting TiCl.sub.4 with a complexing agent in a molar ratio of from 1:0.3 to 1:2;(b) reacting an organo-aluminum compound with a complexing agent in a molar ratio of at most 1:0.25;(c) reducing the complexed TiCl.sub.4 with the complexed organo-aluminum compound over a period of less than one hour at a temperature within the range 60.degree. to 110.degree. C. to produce TiCl.sub.3 particles having an average particle size of from 50 to 500 .mu.m;(d) subjecting the TiCl.sub.3 particles to a treatment to reduce the average particle size thereof to less than 50 .mu.m, and(e) classifying the TiCl.sub.Type: GrantFiled: November 8, 1979Date of Patent: March 31, 1981Assignee: Shell Oil CompanyInventors: Andras G. T. G. Kortbeek, Adrianus A. Van Der Nat
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Patent number: 4229405Abstract: Void-free thermoplastic polymer slabs suitable for conversion into articles by shaping in the solid phase are produced by a method which comprises:(a) placing deformable mold rings on a heat-transmitting endless belt at regular spacings, suitably by cementing the mold rings to the belt; and(b) forming polymer slabs by moving the belt at staged intervals to successively:(i) fill a mold ring from said melt dispensing means while the ring is resting on said belt;(ii) place said filled mold ring under compression between two heated platens at at least one station;(iii) subsequently placing said filled mold ring under compression between cooled platens at a multiplicity of cooling stations; and(iv) removing the cooled molded article, sufficiently solidified to maintain its shape, from the mold after it leaves the last of said cooling stations.Type: GrantFiled: December 11, 1978Date of Patent: October 21, 1980Assignee: Shell Oil CompanyInventor: Paul M. Coffman
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Patent number: 3988257Abstract: A process for preparing cured epoxy resins, the cured epoxy products, and the curing composition employed, are disclosed. The process comprises contacting an epoxy resin with the curing composition, i.e., a polyamine curing agent and a phenyl urea accelerator.Type: GrantFiled: September 29, 1975Date of Patent: October 26, 1976Assignee: Shell Oil CompanyInventors: Tony Harrison, Roger G. Weatherhead
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Patent number: D244990Type: GrantFiled: December 15, 1975Date of Patent: July 12, 1977Assignee: Bercon Packaging, IncorporatedInventor: Victor F. Anderson
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Patent number: D248619Type: GrantFiled: October 8, 1976Date of Patent: July 25, 1978Assignee: Shell Oil CompanyInventor: Victor F. Anderson
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Patent number: D248829Type: GrantFiled: October 8, 1976Date of Patent: August 8, 1978Assignee: Shell Oil CompanyInventor: Victor F. Anderson
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Patent number: D248830Type: GrantFiled: October 8, 1976Date of Patent: August 8, 1978Assignee: Shell Oil CompanyInventor: Victor F. Anderson
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Patent number: D248831Type: GrantFiled: October 8, 1976Date of Patent: August 8, 1978Assignee: Shell Oil CompanyInventor: Victor F. Anderson
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Patent number: D248836Type: GrantFiled: October 8, 1976Date of Patent: August 8, 1978Assignee: Shell Oil CompanyInventor: Victor F. Anderson