Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7052768 | Solid insulator and method for manufacturing a solid insulator Solid insulator for gas-insulated encapsulated high voltage installations with an insulator body, which is supporting at least one central conductor that is provided for carrying high voltage and that is arranged in an outer enclosure. The insulator body comprises a... | 05/30/2006 |
| 6867155 | Non-abrasive composite doctor blade A multiplayer composite doctor blade has a side edge configured for application to the surface of a rotating roll in a paper making machine. The doctor blade has an inner core and intermediate layers preferably enclosed by outer layers. The inner core is predominant... | 03/15/2005 |
| 6857141 | Lavatory wicker basin A multi-layered concave basin is formed for mounting in an opening in a wash stand. The basin is made from pliant woven twigs with successive bottom layers of a first clear epoxy, a clear fiber cloth and a second clear epoxy and a top layer of a third clear epoxy to... | 02/22/2005 |
| 6841026 | Method for reducing coefficient of thermal expansion in chip attach packages A simple, inexpensive, drillable, reduced CTE laminate and circuitized structures comprising the reduced CTE laminate, is provided. One embodiment of the reduced CTE laminate comprises: from about 40% to 75%, preferably from about 55% to 65%, by weight resin; from a... | 01/11/2005 |
| 6825137 | Lightweight ballistic resistant rigid structural panel A lightweight ballistic resistant rigid structural panel especially for use in aircraft interiors is disclosed. The rigid structural panel is made up of a core layer including a plurality of sheets of flexible, high-tensile strength fabric interleaved with a plurali... | 11/30/2004 |
| 6720277 | Protective fabric having high penetration resistance A protective fabric of high penetration resistance is formed from a plurality of layered, densely woven base fabrics, each formed by tightly weaving multifilament yarns to obtain a warp yarn “density” or “cover” in excess of 100% at the center of the fill ya... | 04/13/2004 |
| 6555488 | Three-dimensionally reinforced cellular matrix composite and method of making same A light-weight and impact-resistant composite material formed from a three-dimensional textile structure preform comprising at least three systems of yarns that define a plurality of interstices within the textile structure. A cellular matrix material imp... | 04/29/2003 |
| 6297177 | Drumhead construction A drumhead lamination comprising upper and lower layers of synthetic plastic sheet materials and a layer of impregnated polyester or natural fabric sheet material sandwiched in between the systhetic plastic layers. A substance employed to impregnate the f... | 10/02/2001 |
| 6294485 | Papermakers dryer fabric A papermakers dryer fabric is operable to carry a paper web on one face thereof. The fabric comprises a base substrate that is coated and optionally partially or fully impregnated with resin so as to yield a substrate having a substantially impermeable an... | 09/25/2001 |
| 6099946 | High pressure water jet protection A two-structure composite for protection from high velocity water jets is provided and includes one structure of tightly woven aramid yarns impregnated by a resin matrix and one structure of nonwoven, bulked, material.... | 08/08/2000 |
| 5912062 | Utilization of waste fibers in laminates The present invention provides compositions and processes wherein recycling of waste carpets and textiles is achieved by coating the individual yarn fibers with a low viscosity adhesive that is dispersed or dissolved in a suitable solvent to affect covera... | 06/15/1999 |
| 5652052 | Bi-composite joint using continuous fiber A cloth employing graphite fibers may be subjected to different composite material formation processes so that three separate sections of heat capability may result across continuous fibers. Thus, one section may have optimum cold temperature strength whi... | 07/29/1997 |
| 5462791 | Fiber-reinforced plastic material comprising stacked woven fabrics of differential weave in a plastic matrix There are disclosed fiber-reinforced plastic materials with a composite structure including at least two kinds of fibers as reinforcing materials, which have reciprocal thermal expansion and contraction properties, and a synthetic resin as a matrix. The f... | 10/31/1995 |
| 5458929 | Cure controlled catalyzed mixtures of epoxy resins and curing agents containing mesogenic moieties, B-staged and cured products therefrom Laminates containing one or more plies of substrate material impregnated with a composition containing (A) one or more epoxy resins, (B) one or more curing agent and (C) about 0.00005 to about 0.1 mole per epoxide equivalent of cure controlling catalyst, ... | 10/17/1995 |
| 5455107 | Carbon fiber woven fabric, its weaving method and weaving apparatus A carbon fiber woven fabric which uses a flat carbon fiber yarn consisting of many carbon fibers as at least its warp or weft, its weaving method and weaving apparatus. The flat carbon fiber yarn is twist-free, the number of its carbon fibers being 6,000 ... | 10/03/1995 |
| 5432010 | Binder resin for resin transfer molding preforms, preforms made therewith, and a method for preparing such preforms The invention relates to a resin transfer molding preform binder resin that comprises at least one aromatic polyepoxide, a fluorene epoxide that is different than the aromatic polyepoxide and having a defined structure, and a 9,9-bis(aminophenyl)fluorene ... | 07/11/1995 |
| 5431765 | Preparing epoxy resin/aminopolysiloxane/aromatic oligomer composite A cured, fiber-reinforced composite is prepared by blending an amino-functional silicone resin containing monophenyl siloxy units and amino-functional siloxy units, an epoxy resin, a hardener for the epoxy resin and an aromatic oligomer such as a polyethe... | 07/11/1995 |
| 5427725 | Process for resin transfer molding and preform used in the process An improved process to make composites contains the steps of: (1) partially curing a tackifier resin in contact with a substrate to form a shapeable preform; (2) adding a matrix resin and co-curing the tackifier and matrix resin to form a composite. The r... | 06/27/1995 |
| 5281470 | Vibration damper A vibration damper of a high polymer resin sheet which contains epizoelectric ceramic powder and a cloth layer placed therein including carbon fibers, which provides excellent as well as consistent and reliable damping effects in a relatively wide tempera... | 01/25/1994 |
| 5244719 | Prepreg with improved room temperature storage stability Prepreg comprising structural fiber and matrix resin formulated from epoxys selected from the group consisting of polyglycidyl ethers of polycyclic bridged hydroxy-substituted polyaromatic compounds and N,N,N',N'-tetraglycidyl-bis(4-amino-3-ethylphenyl) m... | 09/14/1993 |
| 5242748 | Toughened thermosetting structural materials The incorporation of 2 to 25 μm particles of a limited class of polyimides having appreciable nonaromatic character into heat curable epoxy resin systems significantly increases the toughness of such systems without loss of other desirable properties. Th... | 09/07/1993 |
| 5217766 | Stabilized complex composite preforms A method for forming stabilized preforms for complex composite articles is disclosed using a solid meltable uncatalyzed thermosetting resin as the stabilizing agent. The resin is applied to each layer of the preform and heated to melt the resin and bond t... | 06/08/1993 |
| 5169710 | Fiber-reinforced composites toughened with porous resin particles Layered, fiber-reinforced composites toughened by the use of thermosetting matrix resins including rigid particles are improved in toughness when the particles are porous and have a spheroidal spongy structure, are formed of a polyamide. The method of the... | 12/08/1992 |
| 5073438 | Process for the preparation of laminates A laminate prepared by combining at least two layers wherein at least one of which is made of a fibrous material, an epoxy resin having on average at least two 1,2-epoxide groups per molecule or a mixture of these epoxy resins and a ferrocene derivative o... | 12/17/1991 |
| 5011721 | Chemorheologically tailored matrix resin formulations and their use in making pre-impregnated fibers and in fabricating composite parts Chemorheologically viscosity tailored matrix resin formulation for use in forming prepregs and filament wound composite articles and having a specified viscosity profile comprising a curable matrix resin and an effective amount of a reactive resin curing ... | 04/30/1991 |
| 4895673 | Emulsions for electrodepositing polymeric alloys and copolymers Disclosed is an emulsion having a discontinuous phase which comprises at least two compounds of different structural formula selected from the group consisting of solvent-soluble polymers, oligomers, and monomers dissolved in an organic solvent, and a dis... | 01/23/1990 |
| 4784898 | High sonar transmission composition Plastic compositions having good sonar transmission, that is low loss of sound transmission, are a composite of a low loss sonar material, for example polyethylene, and a high tensile strength material, for example fiberglass, adhered together by a binder... | 11/15/1988 |
| 4778716 | Method of increasing the toughness of fiber-reinforced composites without loss of modulus Inclusion of minor amounts of predominately amorphous silica microfibers into thermosetting matrix resins allow manufacture of prepregs which produce toughened composites resistant to impact damage without the loss of modulus normally associated with toug... | 10/18/1988 |
| 4770926 | Hybrid fiber-reinforced plastic composite material A hybrid fiber-reinforced plastic composite material comprising a matrix of a plastic and hybrid fibers consisting of inorganic fibers and at least one kind of fibers selected from the group consisting of carbon fibers, glass fibers, boron fibers, aramide... | 09/13/1988 |
| 4604314 | Printed circuit boards of laminated thermosetting sheets Improved printed circuit boards of laminated thermosetting sheets with epoxy resin as the bonding agent contain for inhibiting copper migration 0.1% to 10% N,N'-bis-salicyloyl hydrazine, based on the weight of the hardened epoxy resin.... | 08/05/1986 |
| 4539253 | High impact strength fiber resin matrix composites Improved fiber resin matrix prepreg fabrics are disclosed which are comprised of a first layer of reinforcing fabric coated with an epoxy resin composition and a discrete second layer of an epoxy resin modified with an elastomeric polymer. The discrete se... | 09/03/1985 |
| 4537834 | Metal (II) 4,4',4",4'"-phthalocyanine tetraamines as curing agents for epoxy resins Metal, preferably divalent copper, cobalt or nickel, phthalocyanine tetraamines are used as curing agents for epoxides. The resulting copolymers have high thermal and chemical resistance and are homogeneous. They are useful as binders for laminates, e.g. ... | 08/27/1985 |
| 4532275 | Fiber-reinforced composite materials A fiber-reinforced composite material comprising a resin and 20 to 90% by weight, based on the composite material, of reinforcing fibers, said reinforcing fibers comprising fibers of a wholly aromatic polyamide consisting essentially of (1) structural uni... | 07/30/1985 |
| 4501787 | Flame retardant B-staged epoxy resin prepregs and laminates made therefrom A prepreg useful in flame resistant copper clad printed circuit boards is made by impregnating a porous substrate with an impregnant containing: either a prebrominated epoxy resin or a mixture of a non-halogenated epoxy resin and flame retarding additive ... | 02/26/1985 |
| 4482659 | Toughened thermosetting compositions for composites Disclosed is a water based thermosetting epoxy composition of a water compatible epoxy resin, about 5 to about 35% based on total solids of a water polymerized impact modifier in a water based latex, about 1.5 to about 7% based on the weight of the epoxy ... | 11/13/1984 |
| 4101693 | Method of preparing epoxy-glass prepregs Epoxy resin compositions comprising a first epoxy resin having a relatively low epoxy equivalent weight of about 170 to 200 and an average functionality of 2 or less, a second epoxy resin having a relatively high epoxy equivalent weight of about 900 to 19... | 07/18/1978 |
