Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Rakesh K. Gupta Patents
Inventor:
Gupta; Rakesh K.
Address:
New Delhi, IN
No. of patents:
25
Patents:




Patent Number Title Of Patent Date Issued
7300792 Lux expression in eukaryotic cells November 27, 2007
The luxA, B, C, D, and E genes from Photorhabdus luminescens have been introduced into Saccharomyces cerevisiae bioluminescent yeast cells.
7114374 Sensitive spinline-type extensional viscometer for mobile liquids employing very small liquid vo October 3, 2006
A method for making fluid elasticity measurements using an extensional viscometer (100) is disclosed, where stress is not directly measured but is inferred from an accurate measurement of the change in the rate of flow of a liquid during passage through a vertical capillary (104). The
6458726 Polypropylene fibers and items made therefrom October 1, 2002
Process of producing skin-core fibers and the resulting fibers and nonwoven materials and articles wherein the fibers are composed of a polymer blend of a polyolefin and polymeric bond curve enhancing agents, such as ethylene vinyl acetate polymers.
6177191 Internally lubricated fiber, cardable hydrophobic staple fibers therefrom, and methods of making January 23, 2001
Hydrophobic polyolefin fibers are provided with an internal hydrophobic polysiloxane of the formula ##STR1##in which X, Y, R.sup.1, and R.sup.2, which may be the same or different, or substituted or unsubstituted independently of each other, are aliphatic groups having not more than
6117546 Yarns containing linear low density polyethylene fibers September 12, 2000
A yarn comprising linear low density polyethylene fiber and nonmelting fiber or fiber having a melting point higher than the linear low density polyethylene fiber, and structures made therefrom.
6116883 Melt spin system for producing skin-core high thermal bond strength fibers September 12, 2000
Process and apparatus for spinning polymer filaments permits the obtaining of skin-core filament structure by feeding a polymer composition to a spinnerette at a flow rate sufficient to obtain a spinning speed of about 10 to 200 meters per minute through the spinnerette; heating the poly
5985193 Process of making polypropylene fibers November 16, 1999
Process of producing skin-core fibers and the resulting fibers and nonwoven materials and articles wherein the fibers are composed of a polymer blend of a polyolefin and polymeric bond curve enhancing agents, such as ethylene vinyl acetate polymers.
5888438 Thermally bondable fiber for high strength non-woven fabrics March 30, 1999
Thermobondable fiber of at least one first component of polypropylene having a melt flow rate of 0.5-30, and at least one second component of polypropylene having a melt flow rate of 60-1000.
5824613 Laminates comprising textile structures comprising linear low density polyethylene fibers October 20, 1998
A laminate comprising (1) at least one layer of a textile structure comprising linear low density polyethylene fiber and (2) at least one layer of a textile structure comprising nomnelting fiber or fiber having a melting point higher than the linear low density polyethylene fiber, ne
5763334 Internally lubricated fiber, cardable hydrophobic staple fibers therefrom, and methods of making June 9, 1998
Hydrophobic polyolefin fibers are provided with an internal hydrophobic polysiloxane of the formula X--[Si(R.sup.1)(R.sup.2)--O--].sub.z --Y, in which X, Y, R.sup.1, and R.sup.2, which may be the same or different, or substituted or unsubstituted independently of each other, are aliphati
5733646 Thermally bondable fiber for high strength non-woven fabrics March 31, 1998
Thermobondable fiber of at least one first component of polypropylene having a melt flow rate of 0.5-30, and at least one second component of polypropylene having a melt flow rate of 60-1000.
5712209 Fabrics comprising filling yarns comprising linear low density polyethylene fibers January 27, 1998
A fabric comprising a warp yarn and a filling yarn, wherein the filling yarn comprises linear low density polyethylene fiber and the warp yarn comprises nonmelting fiber or fiber having a melting point higher than the linear low density polyethylene fiber.
5705119 Process of making skin-core high thermal bond strength fiber January 6, 1998
Process and apparatus for spinning polymer filaments permits the obtaining of skin-core filament structure by feeding a polymer composition to a spinnerette at a flow rate sufficient to obtain a spinning speed of about 10 to 200 meters per minute through the spinnerette; heating the poly
5691442 Transparent poly(arylene ether) compositions November 25, 1997
The transparency of poly(arylene ether) homopolymers and copolymers is improved by endcapping the polymer chain with an unsubstituted phenolic-based endcapping agent.
5683809 Barrier element fabrics, barrier elements, and protective articles incorporating such elements November 4, 1997
Protective articles such as diapers, having filmless hydrophobic barrier elements such as cuffs and backing sheets. The barrier cuffs--which can be, for instance, leg cuffs and waistbands--and the backing sheets can be provided from fabrics having a fabric weight of at least 10 gsy; thes
5654088 Thermally bondable fiber for high strength non-woven fabrics August 5, 1997
Thermobondable fiber of at least one first component of polypropylene having a melt flow rate of 0.5-30, and at least one second component of polypropylene having a melt flow rate of 60-1000.
5629080 Thermally bondable fiber for high strength non-woven fabrics May 13, 1997
Thermobondable fiber of at least one first component of polypropylene having a melt flow rate of 0.5-30, and at least one second component of polypropylene having a melt flow rate of 60-1000.
5582667 Method of preparing multiconstituent fibers and nonwoven structures December 10, 1996
Multiconstituent fibers prepared from two or more polymers, with at least one of these polymers being randomly dispersed through the fiber, in the form of domains. At least about 40 percent by weight of these domains have one length of at least 20 microns, measured in the direction along
5554441 Random macrodomain multiconstituent fibers, their preparation, and nonwoven structures from such September 10, 1996
Multiconstituent fibers prepared from two or more polymers, with at least one of these polymers being randomly dispersed through the fiber, in the form of domains. At least about 40 percent by weight of these domains have one length of at least 20 microns, measured in the direction along
5554437 Gamma-sterilizable barrier fabrics September 10, 1996
A gamma-sterilizable barrier fabric comprises (1) at least one layer of a gamma-sterilizable nonwoven material comprising cardable multiconstituent staple fibers, at least 50% by weight of the nonwoven material comprising a gamma-sterilizable polymer, and (2) at least one layer of ga
5554435 Textile structures, and their preparation September 10, 1996
Nonwoven structures, prepared from meltblown microfibers, and fibers having heterogeneous melt viscosity. The structures can be in the form of composite nonwoven fabrics, made from alternating layers of the indicated meltblown and heterogeneous fibers; the melt flow rate, of the surface
5534340 Nonwoven materials comprising 0.5 to 1.2 decitex cardable polyolefin fibers and having liquid st July 9, 1996
The fabrics of this invention have a unique combination of liquid barrier properties and high air permeability and comprise at least one carded nonwoven web comprising at least 10% by weight, based on the total weight of cardable fibers, of cardable polyolefin fibers having a fiber finen
5173561 Heat resistant polyimide-benzoxazole polymers and composites thereof December 22, 1992
The present invention relates to a novel class of aromatic diamine monomers, benzoxazole polymers made from said class of monomers, and polymer-matrix composites which may be produced therefrom. The present invention also relates to methods of producing said polymers and said polymer
5098609 Stable high solids, high thermal conductivity pastes March 24, 1992
A paste including a thermally conducting solid filler, a nonaqueous liquid carrier and a stabilizing dispersant. The pastes are highly concentrated, of low viscosity, electrically resistive, highly thermally conducting and stable. The pastes are easily applicable to electrical and electr
5021519 Epoxy-polyimide blend for low temperature cure, high-performance resin system and composites June 4, 1991
A non-elastomeric epoxy having a mol wt less than about 10,000 and curing agent therefor ("epoxy-curing-agent"), both of which (epoxy/epoxy-curing-agent) are liquid while at curing temperatures, provide a continuous liquid phase in which a polyimide (PI) generally, and a bisimide (BI


 
 
  Recently Added Patents
Towel ring
Phosphor, production method thereof and light emitting instrument
Biosignal detector
Tray-type optical disc drive with improved reliability under vertical disposition
Modular ballistic wall and target system
Machine reamer
Process for recycling an active slurry catalyst composition in heavy oil upgrading
  Randomly Featured Patents
Concentric metal density power routing
Automatic film information reading method and device
Method to reduce overhead time in an ion metal plasma process
Method for producing cement
Fully-swallowable endoscopic system
Safety plug adapter
Cleaning apparatus
Explosive projectile assembly with a projectile body
Small boat mooring system
Method for interference cancellation in a cellular CDMA network