Patents by Inventor Robert L. Lilly
Robert L. Lilly 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: 6204317Abstract: The present invention is directed to a method for producing polymeric fibers with improved anti-static properties and deep dyeability. The method employs anti-static agents that are solid, waxy substances at room temperature. The anti-static agent is pulverized and combined with a carrier to form a dispersion and injected into the throat of a spinning extruder. Polymeric material is added to the extruder and heated with the anti-static agent to form a melt. The melt is then extruded to form the polymeric fiber. Alternatively, the molten anti-static agent is melted and fed through heated lines into a spinning extruder. Polymeric material is added to the extruder and heated with the anti-static agent to form a melt. The melt is then extruded to form the polymeric fiber.Type: GrantFiled: August 4, 1994Date of Patent: March 20, 2001Assignee: BASF CorporationInventor: Robert L. Lilly
-
Patent number: 5952099Abstract: Electrically conductive thermoplastic fibers are made by spinning a fiber having an electrically conductive sheath of thermoplastic polymer formulated with carbon black and a non-conductive core from the thermoplastic polymer; quenching the fiber after said spinning to a temperature below the melting point of the thermoplastic; drawing the quenched fiber at a draw ratio between about 2.0 and about 3.2; and, after drawing, relaxing the fiber at a temperature below the melting point of the thermoplastic but above its glass transition.Type: GrantFiled: January 20, 1998Date of Patent: September 14, 1999Assignee: BASF CorporationInventors: Pravin P. Asher, Robert L. Lilly, Grover L. Davenport, Jr., Robert K. Hyatt, Charles H. Rogers
-
Patent number: 5776608Abstract: Electrically conductive thermoplastic fibers are made by spinning a fiber having an electrically conductive sheath of thermoplastic polymer formulated with carbon black and a nonconductive core from the thermoplastic polymer; quenching the fiber after said spinning to a temperature below the melting point of the thermoplastic; drawing the quenched fiber at a draw ratio between about 2.0 and about 3.2; and, after drawing, relaxing the fiber at a temperature below the melting point of the thermoplastic but above its glass transition.Type: GrantFiled: June 6, 1997Date of Patent: July 7, 1998Assignee: BASF CorporationInventors: Pravin P. Asher, Robert L. Lilly, Grover L. Davenport, Jr., Robert K. Hyatt, Charles H. Rogers
-
Patent number: 5741532Abstract: An apparatus for melting particulate polymeric material includes a melting grid and a molten polymer reservoir beneath the grid. The apparatus has a lateral cross-sectional contour defined by walls. Further included is a distribution device having upper and lower surfaces and adapted to the contour of the molten polymer reservoir, which device is disposed in the molten polymer reservoir in proximity to the grid. The device has an internal reservoir formed between the upper and lower surfaces; a perimetrical surface joining the upper and lower surfaces and providing the device with height; at least two fluid distribution pores, each having one end in communication with the internal reservoir and another end disposed in the circumferential surface; and an injection tube providing fluid flow communication between the internal reservoir and an external supply of fluid.Type: GrantFiled: November 20, 1995Date of Patent: April 21, 1998Assignee: BASF CorporationInventors: Robert L. Lilly, Charles H. Rogers, Zachary G. Shoaf, Wayne L. Conard, Steve C. Parks
-
Patent number: 5698148Abstract: Electrically conductive thermoplastic fibers are made by spinning a fiber having an electrically conductive sheath of thermoplastic polymer formulated with carbon black and a non-conductive core from the thermoplastic polymer; quenching the fiber after said spinning to a temperature below the melting point of the thermoplastic; drawing the quenched fiber at a draw ratio between about 2.0 and about 3.2; and, after drawing, relaxing the fiber at a temperature below the melting point of the thermoplastic but above its glass transition.Type: GrantFiled: July 26, 1996Date of Patent: December 16, 1997Assignee: BASF CorporationInventors: Pravin P. Asher, Robert L. Lilly, Grover L. Davenport, Jr., Robert K. Hyatt, Charles H. Rogers
-
Patent number: 5614142Abstract: Fibers are made from thermoplastic polymers by supplying solid particles of the thermoplastic to a melting grid; heating the melting grid to a temperature sufficient to melt the thermoplastic; melting the thermoplastic particles on the heated melting grid such that the melted thermoplastic flows through the grid and is collected in a collecting chamber located beneath the melting grid; injecting into the collecting chamber below the melting grid an additive present in a non-aqueous carrier which carrier comprises organic rosin materials and a surfactant; without actuated mechanical stirring, forming a substantially homogeneous mixture from the injected additive; and extruding fibers from the substantially homogeneous mixture.Type: GrantFiled: November 20, 1995Date of Patent: March 25, 1997Assignee: BASF CorporationInventors: Robert L. Lilly, Robert H. Blackwell, Charles H. Rogers, Zachary G. Shoaf
-
Patent number: 5416958Abstract: A napped textile product is prepared by supplying a polyethylene terephthalate homopolymer yarn having an elongation of from about 20% to about 80%, a tenacity of from about 2.5 to about 3.5 grams/denier, and a boiling water shrinkage of from about 2% to about 15%; (b) forming a fabric from the yarn, so that substantially all yarn is the polyester yarn supplied in step (a); and (c) providing the fabric prepared in step (b) to a napping machine.Type: GrantFiled: January 21, 1992Date of Patent: May 23, 1995Assignee: BASF CorporationInventors: Robert L. Lilly, Pravin Asher
-
Patent number: 5382474Abstract: Disclosed is a process for producing polyethylene terephthalate fibers with reduced flammability which comprises the following steps:(a) condensating terephthalic acid and ethylene glycol in a mole ratio of from 1:1.1-1.5 at a temperature of from 180.degree.to 240.degree. C. in the presence of a catalyst;(b) adding a polyalkylene glycol phosphate ester;(c) polycondensating at a temperature of from 265.degree.-280.degree. C. under a pressure decreasing from 760 torr to less than 2 torr to form the polyethylene terepthalate; and(d) melt spinning fibers.Type: GrantFiled: September 24, 1992Date of Patent: January 17, 1995Assignee: BASF CorporationInventors: Atish Adhya, Thomas F. Corbin, Robert L. Lilly
-
Patent number: 5369160Abstract: Disclosed is a thermoplastic polyamide with reduced flammability obtained by melt mixing a polyamide with a phosphate ester of the general formula: ##STR1## wherein n is a number of from 1 to 10;m is a number of from 0 to 3;x is a number of from 0 to 3;R is linear or branched C.sub.1 -to C.sub.18 -alkyl radical.Type: GrantFiled: September 24, 1992Date of Patent: November 29, 1994Assignee: BASF CorporationInventors: Atish Adyha, Robert L. Lilly
-
Patent number: 5364582Abstract: The present invention is directed to a method for producing polymeric fibers with improved anti-static properties and deep dyeability. The method employs anti-static agents that are solid, waxy substances at room temperature. The anti-static agent is pulverized and combined with a carrier to form a dispersion and injected into the throat of a spinning extruder. Polymeric material is added to the extruder and heated with the anti-static agent to form a melt. The melt is then extruded to form the polymeric fiber. Alternatively, the molten anti-static agent is melted and fed through heated lines into a spinning extruder. Polymeric material is added to the extruder and heated with the anti-static agent to form a melt. The melt is then extruded to form the polymeric fiber.Type: GrantFiled: August 30, 1993Date of Patent: November 15, 1994Assignee: BASF CorporationInventor: Robert L. Lilly
-
Patent number: 5322883Abstract: Disclosed is a thermoplastic polyester with reduced flammability obtained by:(a) condensating an aromatic dicarboxylic acid and an alkylene glycol in a mole ratio of from 1:1.1-1.5 at a temperature of from 180.degree. to 240.degree. C. in the presence of a catalyst;(b) adding a polyalkylene glycol phosphate ester;(c) polycondensating at a temperature of from 265.degree. to 280.degree. C. under a pressure decreasing from 760 torr to less than 2 torr until an intrinsic viscosity of about 0.5 to about 0.7 is reached.Type: GrantFiled: September 24, 1992Date of Patent: June 21, 1994Assignee: BASF CorporationInventors: Atish Adyha, Thomas F. Corbin, Robert L. Lilly
-
Patent number: 5238982Abstract: Disclosed is a method for producing polyamide fibers with reduced flammability by melt mixing a polyamide with a phosphate ester of the general formula: ##STR1## wherein n is a number of from 1 to 10;m is a number of from 0 to 3;x is a number of from 0 to 3;R is linear or branched C.sub.1 - to C.sub.18 - alkyl radical;at a temperature of from about 180.degree. to about 280.degree. C., and melt spinning fibers.Type: GrantFiled: September 24, 1992Date of Patent: August 24, 1993Assignee: BASF CorporationInventors: Atish Adhya, Robert L. Lilly
-
Patent number: 4304568Abstract: There is disclosed a method for minimizing ozone fading in dyed polyamides by treating the dyed polyamide with a substituted piperidine thiourea of the formula ##STR1## where R is a lower alkyl radical having 1-5 carbon atoms or phenyl. The treated dyed polyamides, preferably in fiber form, display minimize ozone fade without a reduction in light stability.Type: GrantFiled: May 19, 1980Date of Patent: December 8, 1981Assignee: Akzona IncorporatedInventors: David A. Johnson, Robert L. Lilly
-
Patent number: 4229813Abstract: A time indicator which is substantially unaffected by variations in temperature. The indicator utilizes a silicone oil which is slowly absorbed onto and moves up a porous strip at a rate which is a function of time. One side of the strip is printed with an oil soluble ink, while the other side is unprinted. The printed side of the strip is laminated with polyethylene film to an unprinted strip. As the silicone oil moves up the strip, the oil contacts the ink causing a dye in the ink to migrate from the printed side to the unprinted side, thus providing a measurable color front moving up the strip. The oil is contained in a frangible ampul and a sponge with a small hole at the bottom is situated between the ampul and the strip. The indicator is substantially unaffected by normal variations in temperature and humidity.Type: GrantFiled: June 26, 1978Date of Patent: October 21, 1980Assignee: Akzona IncorporatedInventors: Robert L. Lilly, Gerardus L. J. Tummers, Claude D. Johnson, Roger D. Davis