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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 5039395 | Steam-cracking in a fluid bed reaction zone The invention is directed to steam-cracking in a fluid bed reaction zone, of a charge of hydrocarbons having at least two carbon atoms per molecule. In this process the charge (3) circulates with steam (2) and inert solid particles, heated at a temperature T | 08/13/1991 |
| 5039227 | Mixer circuit for oil sand The mixer circuit comprises a vertically oriented, open-topped mixer vessel having a cylindrical side wall terminating with a shallow conical bottom. The bottom wall forms a central bottom outlet. Recycled slurry and fresh water streams are fed tangential... | 08/13/1991 |
| 5039725 | Rubber composition The inventive rubber composition comprises (a) an EPM or EPDM rubber, (b) an organopolysiloxane, (c) a finely divided silica filler and (d) a polyoxyethylene glycol having a specified average molecular weight, this last component being the characteristic ... | 08/13/1991 |
| 5037462 | Process and device for production of nitrogen In a process for production of nitrogen by low-temperature rectification of air, the air is compressed and divided into two partial streams of which the first partial stream is cooled and fed to a rectification zone, while the second partial stream is fur... | 08/06/1991 |
| 5037945 | Polymers derived from unsaturated polyesters by addition of compounds with a thiol function and their use as additives modifying the properties of petroleum middle distillates when cold Disclosed are polymers of average molecular weight ranging from 400 to 20,000 comprising thiosubstituted groups per molecule and resulting from the reaction, in the presence of an addition catalyst, of at least one compound with a thiol function, having 1... | 08/06/1991 |
| 5037832 | 2-substituted ergolines 2-Substituted ergolines ##STR1## wherein C2 C3 and C9 C10 represent a single or double bond; X is oxygen or sulfur; R2 is C1-10 alkyl, optionally halogen-substituted C2-10 ... | 08/06/1991 |
| 5036672 | Process and apparatus for air fractionation by rectification A process and an apparatus are disclosed for air fractionation by means of rectification. Nitrogen (16) withdrawn from the process is heated to an intermediate temperature, withdrawn, in part (30), out of the primary heat exchanger (17), and engine-expand... | 08/06/1991 |
| 5035913 | Process of making microwavable oatmeal composition The invention comprises a process for preparing oatmeal, which process comprises soaking steel cut oats and oat bran for a period of time sufficient to hydrate the oats, mixing rolled oats into the hydrated oat fraction, cooking the resultant mixture for ... | 07/30/1991 |
| 5035867 | Reactor and reaction method with internal heat control by hollow heat exchanger plates The invention relates to an apparatus for carrying out chemical reactions in the presence of at least one catalyst, in at least one reaction zone equipped with heat exchanger plates allowing the temperature of the zone to be controlled. The apparatus main... | 07/30/1991 |
| 5035810 | Process for treating wastewater which contains sour gases For the treatment of a wastewater containing sour gases with a stripping gas, resultant stripping gas containing the sour gases is introduced into at least one combustion stage within the total process for recovery of the sulfur-containing components, the... | 07/30/1991 |
| 5035822 | Copolymer compositions particularly useful as additives for hydrocarbon oils New compositions, useful as viscosity additives, having dispersing properties in various hydrocarbon oils, are disclosed, which comprise: recurrent units derived from one or more acrylic or methacrylic esters (e.g. 55-99.8% by weight), recurrent units derived ... | 07/30/1991 |
| 5036111 | Expanded materials with nadimide resin base Expanded material obtained by heating a composition comprising at least one hermosetting nadimide resin, said heating being performed at a temperature and during a period which are sufficient to cause the expansion of said composition by release of cyclope... | 07/30/1991 |
| 5035839 | Compositions forming hydrogen bridges Composition which form hydrogen bridges are suitable for the preparation of materials of non-linear optical properties. '... | 07/30/1991 |
| 5036068 | 4-(pyridyl)- and 4-(oxo-pyridyl)-1,3-benzoxazines Novel benzoxazine derivatives of the formula I ##STR1## wherein R1 to R5 have the meanings defined herein, and salts thereof, exhibit effects on the cardiovascular system.... | 07/30/1991 |
| 5034043 | Air separation with argon recovery An air separation system is provided comprising a double rectification column associated with a raw argon column, the latter being operated at a pressure substantially lower than the low-pressure part of the double column. A coupled turbine-compressor sys... | 07/23/1991 |
| 5034064 | Production process of high-purity lactulose syrup A lactulose syrup suitable for use in the production of foods and drugs is produced by the alkali isomerization of lactose. Elimination of monosaccharides formed in the reaction mixture, such as galactose, is conducted by passing the reaction mixture thro... | 07/23/1991 |
| 5034117 | Process for regenerating a catalyst for the production of aromatic hydrocarbons or for reforming The invention concerns a regeneration process and the corresponding apparatus for regeneration of a reforming catalyst, the reforming operation being carried out in at least two reactors in series, through which the catalyst and the charge successively fl... | 07/23/1991 |
| 5034363 | Catalyst of the gallium-containing aluminosilicate type and its utilization in the aromatization of light C2 -C4 gases An aluminosilicate type catalyst and its use in the aromatization of a C2 -C4 light-gas cut in the presence or not of olefins is described. The catalyst is characterized by the following composition expressed by weight: a) 0.01 to 10... | 07/23/1991 |
| 5034500 | Process for the manufacture of urea-formaldehyde resins Urea-formaldehyde resins, particularly useful for producing particle boards having lower rates of release of formaldehyde are synthesized in several stages including a stage of further condensing a first condensate having a F/U molar ratio of 1.8-2.3 and ... | 07/23/1991 |
| 5033501 | Fire hydrant cap and actuating tool therefor A fire hydrant cap and actuating tool for use therewith provide enhanced security for fire hydrants and increased safety when using the tool. The cap is forged of 8620 carbon steel; is provided with an internal steel lock washer of cadmium plate steel, an... | 07/23/1991 |
| 5032452 | Identification of absorbent material with a thermostable colorant and process A process is provided for applying a thermostable identification mark to an absorbent material such as piece goods or ceramics. A cobalt salt solution containing hydrogen peroxide is applied in the form of a mark to the surface of an absorbent material, f... | 07/16/1991 |
| 5032321 | Flame-retardant polymer compositions and their application to the sheathing of electrical cables Flame-retarded polymer compositions comprising a hydrated inorganic filler, at least one ethylene/alkyl (meth)acrylate copolymer and at least one copolymer of ethylene and of at least one -olefin, which compositions consist essentially of 120 to 24... | 07/16/1991 |
| 5032315 | Phosphate glass useful in high power lasers A low- or no-silica phosphate glass useful as a high average power laser medium and having a high thermal conductivity, K90° C. >0.8 W/mK, and a low coefficient of thermal expansion, °-300° C. | 07/16/1991 |
| 5032298 | Low-molecular weight acrylate-acrylamide copolymers, their manufacture and use to prevent deposition of salts from aqueous media The invention concerns low molecular weight copolymers of acrylic acid or at least partially salified acrylic acid and acrylamide, their process of manufacture and their use. These copolymers may be used to prevent the formation of deposits on the walls o... | 07/16/1991 |
| 5032565 | Process for reducing a refining catalyst before use This invention concerns a process for reducing a refining catalyst before it is put into use, the catalyst containing a support and an active phase based on at least one noble or non-noble metal of group VIII or of group Ib of the periodic classification ... | 07/16/1991 |
| 5030475 | Plasma-enhanced CVD coating process A plasma or photo-induced chemical vapor deposition coating process and apparatus are provided for applying thin dielectric coatings on planar, curved, and large area substrates. A plasma is generated in a tubular outer conductor. This plasma or the UV ra... | 07/09/1991 |
| 5030711 | Process for condensing at least one epoxide on at least one cyclic anhydride in the presence of a catalyst consisting of at least one titanium nitrogenous complex The invention relates to a process for condensing at least one epoxide on at least one cyclic anhydride of a dicarboxylic acid in the presence of a catalyst consisting of at least one titanium nitrogenous complex of the formula (I) Ti(OR1)... | 07/09/1991 |
| 5030741 | Cyclic organometallic compounds The invention relates to cyclic organometallic compounds which are intramolecularly stabilized and also to their use to produce thin films and epitaxial layers by gas-phase deposition.... | 07/09/1991 |
| 5030789 | Catalytic method for the dimerization, codimerization or oligomerization of olefins with the use of an autogenous thermoregulation fluid The invention provides a catalytic method for the dimerization or codimerization or oligomerization, in particular selective, of olefins, carried out under pressure, in a reaction zone 1 containing a solid catalyst bed in which is disposed a plurality of ... | 07/09/1991 |
| 5030383 | Electrooptical display element The invention relates to a liquid crystal display element with a particularly low temperature-dependence of the threshold voltage.... | 07/09/1991 |
| 5028371 | Corrugated metal-clad sandwich panel with a wafer composite core A corrugated metal-clad sandwich panel with a wafer composite core is provided. The single stage process for the panel manufacture involves utilizing a press platen system which is mechanically convertible between a planar and a corrugated configuration. ... | 07/02/1991 |
| 5028722 | Novel 7 ଲ-hydroxy-4-pregnene-3,20-dione derivatives and method for preparing same Novel 7ଲ-hydroxy-4-pregnene-3,20-dione derivatives are disclosed. The group of these compounds has possibility of being utilized as an intermediate for the synthesis of progesterone derivatives having ovulation-inhibiting activity. These compounds themse... | 07/02/1991 |
| 5028251 | Molds for manufacturing molded glass-articles for precision-optical purposes For manufacturing a glass article for precision-optical purposes, a preform is provided which is unwrought relating to the desired shape of the glass article to be manufactured and exhibits within the surface areas serving for the formation of optical eff... | 07/02/1991 |
| 5026952 | Process for separating C2 + or C3 + or C4 hydrocarbons from a gaseous mixture The aim is to separate, by cooling and partial condensation of C2+, C3+ or C4 hydrocarbons contained in a gas mixture comprising, in addition to these components, even lighter constituents. For this purpose, the gas mixtur... | 06/25/1991 |
| 5026728 | Treatment of arthritis and inflammation using N,N-dimethylglycine This invention relates to a method for treating arthritis and other systemic inflammatory conditions by treating the patient systemically with N,N-dimethylglycine.... | 06/25/1991 |
| 5026705 | Benzimidazolylpyridazinones New benzimidazolylpyridazinones of the formula I ##STR1## in which R1 is a styryl or mononculear of binuclear heteroaryl radical which contains 1-4 heteroatoms, each of which is unsubstituted or singly or multiply substituted by alkyl, alk... | 06/25/1991 |
| 5026459 | Apparatus for reactive distillation The invention concerns a process and apparatus for manufacturing methyl tert-butyl ether (MTBE) by reacting methanol with an isobutene-containing hydrocarbon mixture. This process is characterized by the steps of: introducing the reactants into a reaction-dist... | 06/25/1991 |
| 5026642 | Process for the enzymatic production of ketones In a process for the reduction of ketones, the keto compounds are enantioselectively reduced to give secondary alcohols by means of microorganisms. Keto compounds of the formula R3 NH--CHR1 --CO--CH2 --COOR2 in which... | 06/25/1991 |
| 5025076 | Silicone-based fabric finishing agent A silicone-based fabric finishing agent which comprises: an aminoalkyl-substituted diorganopolysiloxane; a reaction product of an aminoalkyl-substituted organopolysiloxane and an epoxy-containing organic compound; a hydrolysis product of an epoxy-containi... | 06/18/1991 |
| 5024209 | Gas cooking appliance with at least one radiant gas burner arranged underneath a glass ceramic plate, as well as process for reducing the heating-up time of such a gas cooking appliance In order to accelerate the heating of a burner plate of a cooking appliance with a glass ceramic cooking surface and a radiant gas burner, the radiant gas burner is operated during the heating-up phase with an increased quantity of gas. The gas quantity i... | 06/18/1991 |
