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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 6355881 | Means for sealing an electronic or optical component within an enclosure housing A package assembly consisting of an electronic and/or optical component mounted on a circuit board and sealed to a housing, the housing having a hole therethrough to provide access to the component and being filled with an organic encapsulant material, th... | 03/12/2002 |
| 6044832 | Fall away arrow rest assembly An arrow rest assembly for use with a compound bow. The assembly comprises a bracket subassembly mounted to the frame of the bow or to an overdraw assembly, if the bow is optionally equipped therewith; a cable slide slidably mounted on the cable guide bar... | 04/04/2000 |
| 5483628 | Transparent glass-ceramics The present invention is directed to the preparation of two groups of transparent glass-ceramics exhibiting high optical clarity and containing essentially only one crystal phase. The first group consists essentially, in cation percent, of _____... | 01/09/1996 |
| 5459109 | Substrate glasses for plasma displays This invention relates to glasses especially suitable for use as substrates in plasma display panels, the glasses being essentially free from alkali metal oxides and consisting essentially, in weight percent, of ______________________________________... | 10/17/1995 |
| 5288669 | Glasses with very high index of refraction and low density This invention relates to glasses exhibiting refractive indices higher than 1.880, Abbe numbers of at least 29, densities lower than 4.1, good chemical durability and stability against devitrification, and an integrated transmission over the range of 380-... | 02/22/1994 |
| 5288668 | Glasses made of pink borosilicates, their manufacture, and articles made of such glasses This invention is directed to the production of borosilicate glasses displaying a pink coloration and a chromaticity at a thickness of 4 mm with Illuminant C within the ranges of: x=0.3115-0.4200 y=0.3170-0.3600 Y=15-92% The glasses consist essentially, expres... | 02/22/1994 |
| 5286683 | Alkali metal, copper phosphate glasses This invention is directed to the production of glasses exhibiting transition temperatures below 375° C., preferably below 350° C., and superior resistance to attack by boiling water. The glasses contain at least 10% copper, as expressed in terms of CuO... | 02/15/1994 |
| 5283212 | Thallium germanate, tellurite, and antimonite glasses This invention relates to thallium tellurite glasses possessing a high Verdet constant and high optical nonlinearity, as well as good visible and infrared transmission, making them suitable materials for the fabrication of active optical devices. The glas... | 02/01/1994 |
| 5283211 | Thallium germanate, tellurite, and antimonite glasses This invention relates to thallium germanate, tellurite, and antimonite glasses possessing high optical nonlinearity, as well as good visible and infrared transmission, making them suitable materials for the fabrication of active optical devices.... | 02/01/1994 |
| 5270269 | Lead-free fine crystal glassware This invention relates to fine glass crystal prepared from lead-free glass compositions. The glasses consist essentially, in weight percent, of ______________________________________ SiO2 54-64 BaO 8-13 Li2 O ... | 12/14/1993 |
| 5256603 | Glass bonded ceramic composites This invention is directed to the formation of glass bonded ceramic composite articles, with particular emphasis on forming abrasive products such as grinding wheels. The glasses consist essentially, in weight percent of 15-35% CaO, 35-55% B2 O... | 10/26/1993 |
| 5256604 | Low melting, durable phosphate glasses This invention is directed to the production of glasses exhibiting an annealing point between 290°-325° C., an index of refraction between 1.57-1.66, a linear coefficient of thermal expansion (25°-300° C.) between 130-160×10-7 /°C., ... | 10/26/1993 |
| 5256607 | Neutral, ultraviolet absoring, fixed tint lenses A transparent glass which, at a thickness of 2 mm, does not transmit more than about 1% of ultraviolet radiation at a wavelength of 380 nm and exhibits a neutral gray, fixed tint bounded by apices A, B, C, D, A of the drawing, a purity no higher than 6, a... | 10/26/1993 |
| 5252524 | Polarizing glasses This invention is directed to a glass containing elongated silver halide crystals selected from the group consisting of AgCl, AgBr, AgI, and mixtures thereof which is capable of polarizing radiation in the visible portion of the radiation spectrum and whi... | 10/12/1993 |
| 5250360 | Coated metal article There is disclosed a coated article composed of a metal alloy substrate, the metal alloy having a nickel, chromium, cobalt or iron base, and a coating that serves as an oxygen barrier to insulate the metal surface from oxygen attack at temperatures which ... | 10/05/1993 |
| 5023207 | Slawsonite-containing glass-ceramics The present invention is directed to the preparation of glass-ceramic articles exhibiting an apparent annealing point of at least 1200° C. and containing slawsonite crystallization consisting essentially, in weight percent, of 10-54% SrO, 10-40% Al2... | 06/11/1991 |
| 5004713 | Frequency stable NPO ceramics Bismuth-containing temperature-stable dielectric ceramics are disclosed herein that are stable over a wide range of frequencies, and thus are suitable for ceramic capacitors and microwave dielectrics. This class of materials is defined by the formula Bi | 04/02/1991 |
| 4996172 | Rare earth-containing zinc phosphate glasses This invention is concerned with the preparation of glasses exhibiting transition temperatures below 450° C., working temperatures below 500° C., and exceptional resistance to mild aqueous alkaline solutions consisting essentially, expressed in terms of... | 02/26/1991 |
| 4990172 | Automatic machine for moulding glass articles The invention relates to the moulding of glass articles. It concerns an automatic machine for moulding glass articles by means of pressing, comprising a single split mould (1), means for opening and closing the mould, means (9, 10) for introducing a metered ba... | 02/05/1991 |
| 4979976 | Making colored photochromic glasses This invention is directed to a method for making tinted photochromic glass articles having an integral reduced surface layer exhibiting color, the glass utilizing silver halide crystals as the photochromic agent. The method generally comprises heat treat... | 12/25/1990 |
| 4979975 | Fast response photosensitive opal glasses Photosensitively opacifiable glasses requiring very short exposures to ultraviolet radiation to effect the development of opacity are processed by heating to nucleate Ag followed by cooling to nucleate NaF on the Ag followed by heating to grow the NaF. Th... | 12/25/1990 |
| 4980318 | High refractive index photochromic glasses This invention relates to photochromic glasses exhibiting refractive indices greater than 1.59, densities no higher than 3.1 g/cm3, Abbe numbers of at least 40, weight losses no greater than 0.01 mg/cm2 in the A.O. test, and which, w... | 12/25/1990 |
| 4978646 | Capacitors and high dielectric constant ceramics therefor This invention relates to the production of ceramic materials which exhibit a dielectric constant in excess of 105, when measured at room temperature, and a small temperature coefficient of capacitance across the temperature range of -55° to 125° C., wh... | 12/18/1990 |
| 4977029 | Tintable coatings for glass ophthalmic lenses This invention relates to coatings for application to glass lenses to provide a tint thereto. The coatings at a thickness of no more than 10 microns in conjunction with organic dyes conventionally used to tint organic plastic lenses will impart a visible ... | 12/11/1990 |
| 4977028 | Laminated transparent polarizing glasses and method of making This invention is directed to the production of laminated, transparent, polarizing glass articles. The inventive method contemplates five basic steps: (1) forming parallel microgrooves on a surface of a glass support; (2) washing and drying said surface; (3) d... | 12/11/1990 |
| 4976765 | Method of making glass-ceramic laser gyroscope frame This invention provides a method for forming ring laser gyroscope frames without extensive machining. Parts of necessary configurations for such frames are so fashioned that they can be sealed together into a unit. Those parts are prepared from very low e... | 12/11/1990 |
| 4977110 | Beige-tinted glass-ceramics This invention relates to the production of opaque, beige-tinted glass-ceramic articles consisting essentially, in weight percent, of ______________________________________ SiO2 66-70 TiO2 ... | 12/11/1990 |
| 4971932 | Magnetic memory storage devices The present invention is related to the fabrication of a magnetic memory storage device consisting essentially of a head pad and a rigid information disk, which disk consists essentially of a rigid substrate having a coating of magnetic media on the surfa... | 11/20/1990 |
| 4940674 | High strength, haze-free, transparent glass-ceramics The present invention is directed to transparent, essentially haze-free glass-ceramic articles exhibiting moduli of rupture in excess of 10,000 psi which consist essentially, in weight percent, of 3-6% Li2 O, 17-23% Al2 O3... | 07/10/1990 |
| 4940677 | Zinc-containing phosphate glasses This invention is directed to the preparation of glasses exhibiting a transition temperature below 450° C., a working temperature below 500° C., and excellent resistance to attack by water and mild aqueous alkaline solutions. The glasses consist essenti... | 07/10/1990 |
| 4940678 | Rare earth oxynitride glasses This invention relates to glasses consisting essentially, by weight, of about 35-72% Ln2 O3, 5-37% Al2 O3, 29-56% SiO2, and 4-7.5% N. Up to about one-half of the Ln2 O3 on an atomic ... | 07/10/1990 |
| 4940477 | Method for synthesizing topaz The present invention is directed to a method for synthesizing fluorine-containing, aluminosilicate crystals having a stoichiometry approximating that of topaz. The method comprises three basic steps: (1) vapors of a readily-oxidizable compound of silicon and ... | 07/10/1990 |
| 4940613 | Protective coatings for glass and ceramic vessels This invention relates to glass, glass-ceramic, and/or ceramic vessels which are coated with an organic polymer to reduce breakage and to protect the user from flying fragments when the vessels are broken upon impact. The invention contemplates strongly b... | 07/10/1990 |
| 4939107 | Transformation toughened ceramic alloys This invention is primarily directed to the production of transformation toughened ZrO2 -containing ceramic alloys wherein the toughening agent is selected from the group consisting of a rare earth metal vanadate and a magnesium and/or calcium ... | 07/03/1990 |
| 4939569 | Ultraviolet transmitting glasses for EPROM windows Ultraviolet transmitting glasses exhibiting coefficients of thermal expansion between 46-52×10-7 /°C. and transmittances at a thickness of 1 mm of at least 80% at a wavelength of 254 nm which are essentially free of fluoride and consist essen... | 07/03/1990 |
| 4925814 | Ultraviolet transmitting glasses for EPROM windows Ultraviolet transmitting glasses exhibiting coefficients of thermal expansion between 46-52×10-7 /° C. and transmittances at a thickness of 1 mm of at least 80% at a wavelength of 254 nm which are essentially free of fluoride and consist esse... | 05/15/1990 |
| 4920082 | Glasses exhibiting controlled fluoride release This invention is directed to the preparation of fluoride-containing glasses wherein, when exposed to aqueous solutions, fluoride will be leached therefrom in a controlled manner over a long period of time and which can be melted and formed with little lo... | 04/24/1990 |
| 4908054 | Method for making infrared polarizing glasses This invention is directed to the preparation of glass articles exhibiting a relatively broad band of high contrast polarizing properties in the infrared region of the radiation spectrum from glasses containing silver halide particles selected from the gr... | 03/13/1990 |
| 4897509 | Glass-ceramics for electronic packaging This invention relates to the production of glass-ceramic materials particularly suitable for use as substrates in integrated circuit packaging. The inventive glass-ceramics can be prepared from thermally crystallizable glass capable of being concurrently... | 01/30/1990 |
| 4891336 | High index photochromic glasses The present invention is related to transparent, fast darkening and fading photochromic glasses. The glasses contain SiO2, B2 O3, Al2 O3, ZrO2, Li2 O, Na2 O, K2 ... | 01/02/1990 |
