1
Warren F Knoff, Theresa A Weston: Pre-stuffer box conditioning of ply-twisted carpet yarn. E I Du Pont de Nemours and Company, May 16, 1995: US05414987 (8 worldwide citation)

A process for treating a ply-twisted crimped multifilament yarn. The process involves adjusting the temperature and moisture content of the yarn prior to passing the yarn through a stuffer box which is essentially free of steam. Excess hot fluid is removed from the yarn, and the yarn's temperature i ...


2
Warren F Knoff, Michael J Merrill, Barry Rubin, Akhileswar G Vaidyanathan, James E Van Trump, Theresa A Weston: Method of analyzing the texture of a surface and a carpet characterized by the method. E I Du Pont de Nemours and Company, Jane E Obee, June 28, 1994: US05325301 (7 worldwide citation)

The present invention relates broadly to a method of image analysis for analyzing the texture of a surface, and to a saxony-type carpet having a tightly tailored surface texture characterized by this method. The method employs a model based on a second order co-occurrence matrix model which calculat ...


3
Laurence Nelson Bascom, Warren F Knoff: Reinforced nonwoven fire blocking fabric, method for making such fabric, and articles fire blocked therewith. E I du Pont de Nemours and Company, June 12, 2007: US07229937 (5 worldwide citation)

This invention relates to a thin reinforced nonwoven fabric for fire blocking an article, articles containing such fabrics, and methods for making the fabrics and fire blocking the articles. When exposed to heat or flame, the fabric is capable of increasing its thickness by at least three times. The ...


4
Warren F Knoff, Robert W McAllister, Peter Popper, Steven K Shibata, Robert E Taylor, Paul W Yngve: Method and apparatus for making alternate twist plied yarn and product. E I Du Pont de Nemours and Company, September 24, 1996: US05557915 (4 worldwide citation)

An alternate twist plied yarn formed from a plurality of strands of singles yarn twisted in alternating directions in lengthwise intervals of first half-cycles of twist at a predetermined twist level followed by second half-cycles of twist at the same twist level with reversal nodes therebetween, th ...


5
Warren F Knoff: Pillow-top mattress comprising a fire blocked gusset. E I du Pont de Nemours and Company, September 9, 2008: US07421750 (4 worldwide citation)

This invention relates to an improved gusset for use in fire-blocking a pillow-top mattress. This gusset provides additional fire blocking to provide a pillow-top mattress with improved performance when tested according to Technical Bulletin 603 of the State of California.


6
Laurence N Bascom, Warren F Knoff: Liquid water impermeable reinforced nonwoven fire blocking fabric, method for making such fabric, and articles fire blocked therewith. E I du Pont de Nemours and Company, June 5, 2007: US07226877 (2 worldwide citation)

This invention relates to a thin reinforced nonwoven fabric comprising a liquid impervious polymeric layer, a compressed web of crimped fiber, a binder, and a reinforcing scrim. The fabric bulks when exposed to heat or flame and is useful as a component for fire blocking mattresses, upholstery, and ...


7
Warren F Knoff: Filament specimen fixture. E I Du Pont de Nemours and Company, March 20, 1990: US04909084 (2 worldwide citation)

A single-filament specimen preparation fixture for preparing a multiplicity of tensile testing specimens from the same filament. The fixture can be used manually or it can be adapted for use as one element in an automatic testing system.


8
Laurence N Bascom, Warren F Knoff: Reinforced nonwoven fire blocking fabric, method for making such fabric, and articles fire blocked therewith. E I Du Pont de Nemours and Company, October 26, 2010: US07819994

This invention relates to a thin reinforced nonwoven fabric for fire blocking an article, articles containing such fabrics, and methods for making the fabrics and fire blocking the articles. When exposed to heat or flame, the fabric is capable of increasing its thickness by at least three times. The ...


9
Herman Hans Forsten, Warren F Knoff, William E Younts: Fire resistant fabric composite, process for fire-blocking a mattress and mattress set, and a mattress and mattress set fire-blocked thereby. E I Du Pont de Nemours And Company, Legal Patent Records Center, February 3, 2005: US20050026528-A1

This invention relates to a fabric composite for use in fire-blocking a mattress, a fire-blocked mattress set, and a process for fire-blocking mattresses; the fabric composite comprising, in order, (a) sacrificial outer ticking, (b) sacrificial cushioning material, and (c) fire-blocking fabric, the ...


10
Warren F Knoff: Pillow-top mattress comprising a fire blocked gusset. E I Du Pont de Nemours And Company, Legal Patent Records Center, May 3, 2007: US20070094802-A1

This invention relates to an improved gusset for use in fire-blocking a pillow-top mattress. This gusset provides additional fire blocking to provide a pillow-top mattress with improved performance when tested according to Technical Bulletin 603 of the State of California.