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| Number | Title | Issue Date |
| 5539067 | Components and catalysts for the polymerization of olefins Disclosed are catalysts for the polymerization of alpha-olefins which comprise the reaction product of: (a) an Al alkyl compound; (b) a silicon compound containing at least a Si--OR or Si--OCOR or Si--NR2 bond, R being a hydrocarbyl radical; (c) a s... | 07/23/1996 |
| 5145626 | Process for the continuous manufacture of thermomoldable thermoplastic composite materials Process for the continuous manufacture of thermomoldable thermoplastic composite materials comprising feeding simultaneously on a conveyor belt a granulated thermoplastic polymer together with a reinforcement selected from natural, artificial and syntheti... | 09/08/1992 |
| 5142005 | Process for producing crystalline vinyl aromatic polymers having mainly a syndiotactic structure A process for the production of primarily syndiotactic vinyl aromatic polymers by polymerizing or copolymerizing vinyl aromatic monomers such as styrene or styrene derivatives in the presence of a catalyst system comprising the product of the reaction bet... | 08/25/1992 |
| 5084540 | Ethylene/butene-1 copolymers Crystalline copolymers of ethylene and alpha-olefins CH2 .dbd.CHR in which R is an alkyl group having 2 to 8 carbon atoms, containing 0.5 to 3% by moles of polymerized alpha-olefin and having a density lower than 0.945 g/cc are obtained by poly... | 01/28/1992 |
| 5083082 | Perfluoropolyethers used as fluids for testing in electronic field Perfluoropolyethers having an average molecular weight higher than 390 and respectively having a kinematic viscosity lower than 8.5 cSt (at 20° C.), and such as to distill by not more than 10% at temperatures lower than 140° C., and by at least 90% at ... | 01/21/1992 |
| 5082817 | Catalysts for the polymerization of olefins Catalysts for the polymerization of olefins, obtained by means of the reaction of: a) a compound of a transition metal containing at least one metal-halogen linkage, supported on a magnesium halide in the active form, with b) a compound of Ti, Zr or Hf, contai... | 01/21/1992 |
| 5081141 | Fungicidal azolyl-derivatives Disclosed are compounds having the formula: ##STR1## wherein: m=0, 1; n=0, 1; Z=CH, N; R1 is selected from chlorine, bromine, fluorine, CF3, phenyl, C1 -C2 -alkoxy, C1 -C2 -haloalkoxy, alky... | 01/14/1992 |
| 5055547 | Liquid-crystal copolyethers based on 7-oxa-bicyclo(2,2,1)heptane The present invention relates to copolyethers comprising copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more single-ring or condensed-rings cycloaliphatic ethers, comprising the characteristic group; ##STR1## w... | 10/08/1991 |
| 5043483 | Process for the alkylation of phenols Process for the alkylation of phenols comprising reacting a phenol with a vinyl-aromatic hydrocarbon in the presence of an acidic catalyst and of a solvent.... | 08/27/1991 |
| 5036094 | Azolyl-derivatives endowed with antifungal activity Disclosed are compounds, having the general formula: ##STR1## wherein: m=0, 1, 2; n=0, 1 with the condition that when m=0, also n=0; p=0, 1; q=1, 2; X is either oxygen or sulphur; A=N, CH; R is H, CH3, F; R1 is selected from chlorine, bro... | 07/30/1991 |
| 5032673 | Liquid-crystal copolyethers based on 7-oxa-bicyclo-(2,2,1)-heptane The present invention relates to copolyethers constituted by copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more cycloaliphatic ethers, comprising from 2 to 4 carbon atoms in their ring. These copolyethers show an anisotropic... | 07/16/1991 |
| 5026786 | Perfluoropolyethers having brominated end groups and fluoroelastomers obtained therefrom New perfluoropolyethers comprising repeating units chosen from among ##STR1## statistically distributed along the chain, having a controlled molecular weight and brominated end groups, prepared starting from the product of the photochemical oxidation... | 06/25/1991 |
| 5023801 | Programmable - voltage - generator interface for decreasing the minimum voltage step An interface circuit to the output of a programmable voltage ramp generator for decreasing the minimum voltage step of such a generator having two voltage channels and a minimum voltage step greater than 1 millivolt. The interface circuit receives an inpu... | 06/11/1991 |
| 5017678 | Thermotropic liquid crystalline polymers Melt-formable thermotropic liquid crystalline polymers containing groups derived from terephthalic acid and a mixture of phenyl hydroquinone, 2-(-phenylisopropyl) hydroquinone and, if desired, 2,5 bis (-phenylisopropyl) hydroquinone.... | 05/21/1991 |
| 5015721 | Thermotropic liquid-crystalline aromatic, polyesters Thermotropic liquid-crystalline aromatic polyesters processable in the molten state, comprising units derived from at least one dicarboxy aromatic acid having the formula: HOOC--Ar1 --O--Ar2 --COOH (1) wherein Ar | 05/14/1991 |
| 5002909 | Mixed oxides of alumina and zirconia consisting essentially of spherical particles having a narrow granulometric distribution and process for their preparation Mixed oxides of alumina and zirconia having a controlled granulometric distribution, consisting essentially of spherical, submicronic particles, wherein zirconia is distributed uniformly in alumina and may reach 38% by weight, said zirconia being in the s... | 03/26/1991 |
| 5003028 | Thermoplastic linear aromatic polyetherdiketones and process for obtaining same Thermoplastic linear aromatic polyetherdiketones containing repeating units of formula: ##STR1## wherein R is an arylene radical containing from 1 to 3 aromatic rings directly joined among them, or condensed, or joined by one or more of the foll... | 03/26/1991 |
| 4985533 | Termotropic liquid-crystalline aromatic polyester from hydroquinone/substituted hydroquinone mixture Thermotropic liquid-crystalline aromatic polyesters processable in the molten state, comprising units derived from at least one dicarboxylic aromatic acid and from mono- and di-substituted (1-phenyl-ethyl)-hydroquinones in admixture with hydroquinone, and... | 01/15/1991 |
| 4966957 | Liquid-crystalline, thermotropic aromatic polyester from hydroquinone mixture Liquid-crystalline, thermotropic, aromatic polyesters processable in the molten state, comprising units derived from hydroquinones substituted with aryl, aralkyl and aroyl groups, and from phenoxy-hydroquinone.... | 10/30/1990 |
| 4959434 | Modified impact-resistant vinylaromatic copolymers Modified impact-resistant vinylaromatic copolymers containing from 2 to 10% by weight of an ethylenically unsaturated nutrile and from 0 to 30% by weight of alpha-methyl-styrene and having a gel content higher than 23%, a cracking resistance, in an olive ... | 09/25/1990 |
| 4955726 | Perfluoropolyethers used as fluids for testing in electronic field Perfluoropolyethers having an average molecular weight higher than 390 and respectively having a kinematic viscosity lower than 8.5 cSt (at 20° C.), and such as to distill by not more than 10% at temperatures lower than 140° C., and by at least 90% at ... | 09/11/1990 |
| 4952661 | Thermotropic liquid crystalline polyester from 2,5-dihydroxybenzophenone Thermotropic liquid crystalline polyesters which can be processed in the molten state containing moieties derived from a dicarboxylic aromatic acid and 2,5-dihydroxybenzophenone eventually in a mixture with a substituted hydroquinones.... | 08/28/1990 |
| 4943744 | Differentiating logical circuit for asynchronous systems A differentiating circuit is disclosed for use in asynchronous networks which associates the transfer of information through the circuit with the occurrence of the acquisition of the information by a utilizing circuit. The circuit can be used as a differe... | 07/24/1990 |
| 4942233 | Thermotropic di-s-triazinic derivatives Thermotropic di-s-triazinic derivatives are taught having the general formula: ##STR1## wherein: m is zero or an integer of from 1 to 5, n is an integer of from 5 to 30, and X is a halogen, such as chlorine, or a CH3 (CH2)m | 07/17/1990 |
| 4933290 | Process for the enzymatic separation of the optical isomers of racemic oxazolidinonic derivatives There is disclosed a process for the biotechnological resolution, by enzymatic esterification of the corresponding racemic mixture of the S(+) and R(-) optical isomers of the oxazolidinonic compounds having formula (I): ##STR1## wherein R repres... | 06/12/1990 |
| 4931325 | Manufactured articles based on isotactic polypropylene having a highly oriented structure This invention relates to composite manufactured articles formed by a set of uniaxially oriented isotatic polypropylene films, having a resistance to delamination of at least 0.4 kg/cm are prepared by heating under pressure a plurality of isotatic polypro... | 06/05/1990 |
| 4923955 | Thermotropic liquid-crystalline aromatic polyesters of substituted 4,4'-dihydroxy-diphenylene Thermotropic liquid-crystalline aromatic polyesters of 4,4'-dihydroxy-diphenyl substituted with a halogen or with an alkyl, cycloalkyl, aryl, aralkyl, keto or ether radical.... | 05/08/1990 |
| 4923947 | Thermotropic liquid crystalline aromatic polyesters of disubstituted 4,4'-dihydroxydiphenylene Thermotropic liquid crystalline aromatic polyesters of 4,4'-dihydroxydiphenyl substituted in 3,3' positions by a halogen or by an alkyl, cycloalkyl or aralkyl radical.... | 05/08/1990 |
| 4918217 | Macrocyclic tetramers having columnar tridimensional mesophases Octa-substituted derivatives of the macrocyclic tetramers obtained by condensation of resorcinol with an alkyl aldehyde, wherein the sutstituents are alkanoyl, p-alkylbenzoyl, and p-alkoxybenzoyl chains. These substituted tetramers show stable, tridimensi... | 04/17/1990 |
| 4904628 | Components and catalysts for the polymerization of olefins Catalysts for the polymerization of alpha-olefins, which comprise the product of the reaction between: (a) a metallorganic compound of Al; (b) an electron-donor compound reactive towards MgCl2 but which is not completely complexed with AlEt3 | 02/27/1990 |
| 4904757 | Polyesters of 4,4'dihydroxybicyclohexyl Thermotropic semiflexible polyesters are taught which are obtained by polycondensation of 4,4'-dihydroxybicyclohexyl with at least one ,ω- alkandioic acid of general formula: HOOC-(CH2)n -COOH (I) wh... | 02/27/1990 |
| 4902697 | Derivatives of 2,2-dimethyl-cyclopropanecarboxylic acid Derivatives of 2,2-dimethylcyclopropanecarboxylic acid endowed with insecticidal and acaricidal activity, and having the formula ##STR1## wherein: R is an alkyl, cycloalkyl, alkenyl or alkynyl radical having from 1 to 8 carbon atoms, optionally subst... | 02/20/1990 |
| 4902494 | Process for preparing hydrated alumina consisting essentially of spherical particles by homogeneous precipitation A process for preparing hydrated alumina consisting essentially of spherical particles having a narrow granulometric distribution (polydispersion index dw/dnࣘ2) starting from aqueous solution of aluminum sulphate, the molar ratio SO4= | 02/20/1990 |
| 4894557 | Asyncronous edge-triggered RS flip-flop circuit An edge triggered RS-type flip-flop circuit is disclosed which is capable of changing its state in response to a significant signal transition applied to a currently active input (SET or RESET) and independently of the current state of the other input (RE... | 01/16/1990 |
| 4894384 | Alpha-(1-triazolyl)-keto-derivatives having fungicidal activity There are disclosed -(1-triazolyl)-keto-derivatives of the general formula: ##STR1## in which R is alkyl, alkenyl or phenyl optionally substituted; R" is alkoxycarbonyl, alkylcarbonyl, arylcarbonyl, aminocarbonyl or cyano; R' has the mean... | 01/16/1990 |
| 4893028 | One or more input asynchronous register A register is disclosed in which an applied data signal D or its complement D is used to set or reset an output RS flip-flop under control of an applied load control signal L. The load control signal is applied to a switching circuit which controls applic... | 01/09/1990 |
| 4889939 | Fluoropolyethers containing end groups endowed with anchoring capacity Compounds suitable for being used as lubricants, having general formula: (I) RO--(C3 F6 O)m --(CFXO)n --CFX--L, or (II) R"CFXO--(C3 F6 O)x (CFXO)y --(C2 F4 ... | 12/26/1989 |
| 4886923 | Process for the preparation of tricyclo 8.2.2.2 hexadeca 4,6,10,12,13,15 hexaene chlorinated in the benzene rings A process for the chlorination of the benzene rings of tricyclo 8.2.2.2 hexadeca 4,6,10,12,13,15 hexane (or (2,2)-paracyclophane) having the formula (I): ##STR1## by gaseous chlorine, by operating in the presence of at least one metal chloride a... | 12/12/1989 |
| 4885409 | Process for the hydrogenation of bis-phenols Process for the hydrogenation of bis-phenols by reacting bis-phenols with hydrogen in the presence of a catalytic system consisting of palladium supported on activated carbon.... | 12/05/1989 |
| 4874838 | Liquid crystal copolyethers from 7-oxa-bicyclo-(2,2,1)-heptane The present invention relates to copolyethers comprising copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more cycloaliphatic ethers, comprising from 2 to 4 carbon atoms in their ring. These copolyethers show an anisotropi... | 10/17/1989 |
