Patents by Inventor Ronald E. Steele
Ronald E. Steele 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).
-
Patent number: 8052906Abstract: A process for making a synthetic melt spun polyamide filament in a solid phase polycondensation apparatus is disclosed. The flow rate of the purge (make-up) gas to the apparatus is increased, and the overall pressure in the apparatus is decreased, as compared to solid phase polycondensation apparatus of the prior art. As a result, the removal of the thermal degradation impurity from the polymer flake contributes to improving the yarn quality and at the same time, extends the spinneret wipe life.Type: GrantFiled: September 5, 2003Date of Patent: November 8, 2011Assignee: Invista North America S.à.r.l.Inventor: Ronald E. Steele
-
Patent number: 7165963Abstract: A melt extrusion spinneret plate has at least one non-circular capillary orifice for producing at least a single filament of circular cross-sectional shape. This non-circular cross-sectional shape of the extrusion capillary, when used to extrude filaments of circular cross-sectional shape, extends the spinneret wipe life by lessening the amount of thermal deposits, which extends the time between wipe cycles. As a result of increased wipe life, the productivity of the process is increased.Type: GrantFiled: October 31, 2003Date of Patent: January 23, 2007Assignee: Invista North America S.a.r.l.Inventors: Lance E. Nunley, Ronald E. Steele
-
Patent number: 6926508Abstract: A spinneret steam blanketing system for blanketing the face of a spinneret with gas. The system includes a steam distribution ring surrounding a filament array, where the steam distribution ring abuts the spin head and is removably mounted to said spin head. The steam distribution ring is removed and the face of the spinneret may be wiped clean, without the need for removing and replacing the spin pack.Type: GrantFiled: June 21, 2001Date of Patent: August 9, 2005Assignee: Invista North America SarlInventors: Bobby R. Brady, Elmer L. Goshorn, Frank H. Overton, Ronald E. Steele
-
Publication number: 20040126581Abstract: A process for making a synthetic melt spun polyamide filament in a solid phase polycondensation apparatus is disclosed. The flow rate of the purge (make-up) gas to the apparatus is increased, and the overall pressure in the apparatus is decreased, as compared to solid phase polycondensation apparatus of the prior art. As a result, the removal of the thermal degradation impurity from the polymer flake contributes to improving the yarn quality and at the same time, extends the spinneret wipe life.Type: ApplicationFiled: September 5, 2003Publication date: July 1, 2004Inventor: Ronald E. Steele
-
Publication number: 20020043733Abstract: A spinneret steam blanketing system for blanketing the face of a spinneret with gas. The system includes a steam distribution ring surrounding a filament array, where the steam distribution ring abuts the spin head and is removably mounted to said spin head. The steam distribution ring is removed and the face of the spinneret may be wiped clean, without the need for removing and replacing the spin pack.Type: ApplicationFiled: June 21, 2001Publication date: April 18, 2002Inventors: Bobby R. Brady, Elmer L. Goshorn, Frank H. Overton, Ronald E. Steele
-
Patent number: 5558826Abstract: A coupled spin-draw process for making a fully-oriented nylon yarn including extruding molten nylon polymer with a selected RV through a spinneret and cooling to produce a yarn. The yarn is withdrawn from the quench zone with a feed roll rotating at a speed of at least 4500 mpm. The process further includes cold drawing followed by relaxing the yarn using a steam intermingling jet and then winding up.Type: GrantFiled: February 7, 1995Date of Patent: September 24, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: Walter J. Jaegge, Francis J. Malone, Jr., Frank H. Overton, Roger A. Ross, Ronald E. Steele
-
Patent number: 5202182Abstract: Incorporating a minor amount of a hydrogen bonding additive such as nylon 6 monomer or 2-methyl-pentamethylene adipamide monomer in a nylon 66 high RV polymer for making nylon 66 POY provides unexpected downstream advantages over homopolymer nylon 66 POY, especially in draw-texturing to make bulky yarns for use in hosiery.Type: GrantFiled: March 13, 1992Date of Patent: April 13, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: Benjamin H. Knox, Francis J. Malone, Jr., Gary D. Milosovich, Frank H. Overton, Ronald E. Steele, Paul G. Zmick
-
Patent number: 5137666Abstract: Incorporating a minor amount of a hydrogen bonding additive such as nylon 6 monomer or 2-methyl-pentamethylene adipamide monomer in a nylon 66 high RV polymer for making nylon 66 POY provides unexpected downstream advantages over homopolymer nylon 66 POY, especially in draw-texturing to make bulky yarns for use in hosiery.Type: GrantFiled: June 21, 1990Date of Patent: August 11, 1992Assignee: E. I. du Pont de Nemours and CompanyInventors: Benjamin H. Knox, Francis J. Malone, Jr., Gary D. Milosovich, Frank H. Overton, Ronald E. Steele, Paul G. Zmick
-
Patent number: 5112845Abstract: The invention is concerned with aromatase inhibiting compounds of formula I ##STR1## wherein R and Ro represent hydrogen or lower alkyl; or R and Ro located on adjacent carbon atoms and together when combined with the benzene ring to which they are attached form a naphthalene or tetrahydronaphthalene ring; R.sub.1 and R.sub.2 independently represent hydrogen, lower alkyl, (lower alkyl, aryl or aryl-lower alkyl)-thio, lower alkenyl, aryl, aryl-lower alkyl, C.sub.3 -C.sub.6 -cycloalkyl, or C.sub.3 -C.sub.6 -cycloalkyl-lower alkyl; or R.sub.1 and R.sub.2 combined represent lower alkylidene, mono- or di-aryl-lower alkylidene; R.sub.1 and R.sub.2 combined also represent C.sub.4 -C.sub.6 -straight chain alkylene, lower alkyl-substituted straight chain alkylene or ortho-phenylene bridged-C.sub.2 -C.sub.Type: GrantFiled: December 17, 1990Date of Patent: May 12, 1992Assignee: Ciba-Geigy CorporationInventors: Robert M. Bowman, Ronald E. Steele, Leslie J. Browne, Bruce H. Ewald, Robert Diener
-
Patent number: 5071861Abstract: The invention is concerned with aromatase inhibiting compounds of formula I ##STR1## wherein R and Ro represent hydrogen or lower alkyl; or R and Ro located on adjacent carbon atoms and together when combined with the benzene ring to which they are attached form a naphthalene or tetrahydronaphthalene ring; R.sub.1 and R.sub.2 independently represent hydrogen, lower alkyl, (lower alkyl, aryl or aryl-lower alkyl)-thio, lower alkenyl, aryl, aryl-lower alkyl, C.sub.3 -C.sub.6 -cycloalkyl, or C.sub.3 -C.sub.6 -cycloalkyl-lower alkyl; or R.sub.1 and R.sub.2 combined represent lower alkylidene, mono- or di-aryl-lower alkylidene; R.sub.1 and R.sub.2 combined also represent C.sub.4 -C.sub.6 -straight chain alkylene, lower alkyl-substituted straight chain alkylene or ortho-phenylene bridged-C.sub.2 -C.sub.Type: GrantFiled: April 18, 1990Date of Patent: December 10, 1991Assignee: Ciba-Geigy CorporationInventors: Robert M. Bowman, Ronald E. Steele, Leslie J. Browne
-
Patent number: 4978672Abstract: The invention is concerned with aromatase inhibiting compounds of formula I ##STR1## wherein R and Ro represent hydrogen or lower alkyl; or R and Ro located on adjacent carbon atoms and together when combined with the benzene ring to which they are attached form a naphthalene or tetrahydronaphthalene ring; R.sub.1 and R.sub.2 independently represent hydrogen, lower alkyl, (lower alkyl, aryl or aryl-lower alkyl)-thio, lower alkenyl, aryl, aryl-lower alkyl, C.sub.3 -C.sub.6 -cycloalkyl, or C.sub.3 -C.sub.6 -cycloalkyl-lower alkyl; or R.sub.1 and R.sub.2 combined represent lower alkylidene, mono- or di-aryl-lower alkylidene; R.sub.1 and R.sub.2 combined also represent C.sub.4 -C.sub.6 -straight chain alkylene, lower alkyl-substituted straight chain alkylene or ortho-phenylene bridged-C.sub.2 -C.sub.Type: GrantFiled: September 6, 1988Date of Patent: December 18, 1990Assignee: Ciba-Geigy CorporationInventors: Robert M. Bowman, Ronald E. Steele, Leslie Browne
-
Patent number: 4937250Abstract: The invention is concerned with aromatase inhibiting compounds of formula I ##STR1## wherein R and Ro represent hydrogen or lower alkyl; or R and Ro located on adjacent carbon atoms and together when combined with the benzene ring to which they are attached form a naphthalene or tetrahydronaphthalene ring; R.sub.1 and R.sub.2 independently represent hydrogen, lower alkyl, (lower alkyl, aryl or aryl-lower alkyl)-thio, lower alkenyl, aryl, aryl-lower alkyl, C.sub.3 -C.sub.6 -cycloalkyl, or C.sub.3 -C.sub.6 -cycloalkyl-lower alkyl; or R.sub.1 and R.sub.2 combined represent lower alkylidene, mono- or di-aryl-lower alkylidene; R.sub.1 and R.sub.2 combined also represent C.sub.4 -C.sub.6 -straight chain alkylene, lower alkyl-substituted straight chain alkylene or ortho-phenylene bridged-C.sub.2 -C.sub.Type: GrantFiled: March 7, 1988Date of Patent: June 26, 1990Assignee: Ciba-Geigy CorporationInventors: Robert M. Bowman, Ronald E. Steele, Leslie J. Browne
-
Patent number: 4749713Abstract: The invention is concerned with aromatase inhibiting compounds of formula I ##STR1## where R and Ro represent hydrogen or lower alkyl; or R and Ro located on adjacent carbon atoms and together when combined with the benzene ring to which they are attached form a naphthalene or tetrahydronaphthalene ring; R.sub.1 and R.sub.2 independently represent hydrogen, lower alkyl, (lower alkyl, aryl or aryl-lower alkyl)-thio, lower alkenyl, aryl, aryl-lower alkyl, C.sub.3 -C.sub.6 -cycloalkyl, or C.sub.3 -C.sub.6 -cycloalkyl-lower alkyl; or R.sub.1 and R.sub.2 combined represent lower alkylidene, mono- or di-aryl-lower alkylidene; R.sub.1 and R.sub.2 combined also represent C.sub.4 -C.sub.6 -straight chain alkylene, lower alkyl-substituted straight chain alkylene or ortho-phenylene bridged-C.sub.2 -C.sub.Type: GrantFiled: March 7, 1986Date of Patent: June 7, 1988Assignee: Ciba-Geigy CorporationInventors: Robert M. Bowman, Ronald E. Steele, Leslie J. Browne