Class 65/440 - Sol-gel route or ion exchange utilized

Subclass of Class 65 - Glass manufacturing
Definition: Processes wherein (a) a sol-gel route or (b) an exchanging
No. of patents: 26
Last issue date: 06/05/2007

Number	Title	Issue Date
7226522	Method for the production of a mineral fibre product The present invention is directed to method of bonding mineral fibers in a mineral fiber material, according to which an acid is applied to the mineral fiber material in an amount sufficient to dissolve mineral material from the fiber to form a silica containing bin...	06/05/2007
7159421	Manufacture of planar waveguides using sol-gel techniques Silica sol techniques are described for making thick silica or silica based films useful for planar optical waveguides. The process involves coating of a colloidal silica sol onto a substrate, drying the sol, and consolidating the dried sol to form the planar wavegu...	01/09/2007
7140201	Method for producing silica particles A hydrous silica gel is dehydrated by freezing, thawing, and removing water separated by thawing, thereby yielding silica particles. In addition, the silica particles thus formed is washed and fired, thereby producing a synthetic quartz glass power. A water g...	11/28/2006
7140202	Method for manufacturing optical glasses and colored glasses at low temperatures The invention relates to a method for manufacturing optical glasses and colored glasses with the aid of a fluid phase sintering process from a basic material encompassing at least SiO.sub.2 powder as well as additives for reducing the temperature of the fluid phase ...	11/28/2006
7058243	Optical fiber sensor having a sol-gel fiber core and a method of making A simple, economic wet chemical procedure is described for making sol-gel fibers. The sol-gel fibers made from this process are transparent to ultraviolet, visible and near infrared light. Light can be guided in these fibers by using an organic polymer as a fiber cl...	06/06/2006
7024890	Sol-gel process for the production of optical fiber preforms Sol-gel process for the production of optical fiber preforms or overcladdings by preparing a sol, gelling the sol, drying the wet gel to a dry porous gel and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350° C. to 900°...	04/11/2006
6890873	Glass prepared from pyrogenically prepared silicon dioxide Pyrogenically prepared silicon dioxide with the following physicochemical properties: 1. Average particle size (D50 value) D50≧150 nm (dynamic light scattering, 30 wt %) 2. Viscosity (5 rpm,...	05/10/2005
6889528	Process of making rare earth doped optical fiber The present invention discloses a process for making rare earth (RE) doped optical fiber by using RE oxide coated silica nanoparticles as the precursor material, more particularly the method of the present invention involves preparation of stable dispersions (sol) o...	05/10/2005
6799442	Sol-gel process for the production of manufactures containing an incompressible insert and manufactures thereby obtained A sol-gel process is described that allows dry gels to be produced, and where necessary, the corresponding dense vitreous bodies, around an incompressible insert. A particular feature of the process is the step of rotating a container holding the sol and incompressi...	10/05/2004
6519976	Method for production of silica glass using sol-gel process A composition for production of silica glass using a sol-gel process is described, comprising silica particles, a dispersing agent, and a solution containing a polymerizable monomer for formation of acrylic resin and a crosslink agent dissolved in distill...	02/18/2003
6438998	Ultrasonic dispersion apparatus for silica sol Disclosed are apparatus and method for ultrasonically dispersing a silica sol such as is used in a process of manufacturing a silica glass by a sol-gel method. The apparatus includes a sol feeder for holding a sol to be dispersed, a sol container for cont...	08/27/2002
6374638	Fabrication method of graded index silica glass A fabrication method of graded index silica glass is disclosed. The method according to the present invention includes the steps of dispersing to form sol by mixing a starting material with a dispersion medium; molding the sol into a moisturized gel with ...	04/23/2002
6360564	Sol-gel method of preparing powder for use in forming glass A sol-gel method of preparing a powder for use in forming a glass is provided, along with methods of preparing glasses and glass fibers from the powder. The inventive method allows for the incorporation of a wide range of elements and compositions into a ...	03/26/2002
6223563	Process for fabricating fluorine-doped sol-gel article The invention reflects discovery of a liquid phase doping technique that, unlike previous techniques, exhibits very little fluorine depletion upon subsequent heating. The invention involves the steps of providing a silica sol comprising a tetraalkylammoni...	05/01/2001
6129899	Processes for producing synthetic quartz powder and producing shaped quartz glass A process for producing a synthetic quartz powder, which comprises a step of heat-treating a silica gel powder while permitting it to flow in a rotary kiln....	10/10/2000
6071838	Silica gel, synthetic quartz glass powder, quartz glass shaped product molding, and processes for producing these A synthetic quartz glass powder obtained by sol-gel method, wherein the number of black spot particles is at most 5 particles per 50 g, provides a high quality quartz glass shaped product with low bubble content when fused....	06/06/2000
5938805	Silica glass monolith fabricating method using sol-gel process A silica glass monolith fabricating method using a sol-gel process. In the method, a first sol is formed by mixing 100 parts by weight of high-density silica containing powder with 100-300 parts by weight of water, and rapidly dried, while the pH of the f...	08/17/1999
5919280	Method for fabricating silica glass A method for fabricating a silica glass is provided. The method includes the steps of adding silica and a dispersant to a premix solution obtained by dissolving an acrylic resin monomer and a cross-linking agent in distilled water, dispersing the mixed so...	07/06/1999
5865867	Process for producing gradient index optical element A porous body containing a silicon component as a starting material of optical element is immersed in a solution containing hydrofluoric acid, taken out from the solution and immersed in a solution containing a metal alkoxide containing a first metal comp...	02/02/1999
5837023	Process for making gradient index optical elements The invention provides a process for making a gradient index optical element having a precisely parabolic configuration of refractive index profile. After a concentration profile is imparted across a gel prepared by a sol-gel technique, the concentration ...	11/17/1998
5810899	Glass production A glass with no stria form of defects induced therein is produced by a sol-gel technique. At a sol gelation step, the gelation temperature is maintained constant within the range of &#b1;7° C. with respect to the temperature of a sol as charged in a gela...	09/22/1998
5746797	Process for producing a gradient index optical element A gradient index optical element is disclosed which comprises a surface perpendicular to an optical axis, this surface having points of equal refractive index whose connection provides substantially elliptic lines. This gradient index optical element can ...	05/05/1998
5516350	Process for producing synthetic quartz glass powder Synthetic quartz glass powder is produced by (a) hydrolyzing an alkoxysilane to form a gel, (b) finely dividing the gel and then drying, or drying the gel and then finely dividing, and (c) calcining the obtained powder, the powder being maintained under a...	05/14/1996
4981753	Fabric for printed circuit substrate and printed circuit substrate A fabric for a printed circuit substrate composed essentially of inorganic fibers having a non-circular cross section....	01/01/1991
4838914	Process for producing silica glass fibers A process for producing silica glass fibers comprising: a step of preparing a silica glass fiber spinning solution by adding a polymerization regulator to a silica sol solution obtained by the hydrolysis and condensation of a silicon alkoxide in the presence o...	06/13/1989
4104045	Thermally stable quartz glass Quartz glass of high thermal stability is produced from a SiO2 solution or sol which is substantially free of alkali and alkaline earth metal oxides and contains chromium and/or manganese in about 0.05 to 20% by weight of the SiO2 ex...	08/01/1978

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Class 65/440 - Sol-gel route or ion exchange utilized