Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 6642172 | Extruded catalyst based on silica/alumina gel A catalyst in the form of extruded bodies is disclosed, which consists of an inert binding agent and a catalytically active phase of a silica/alumina gel. The catalyst is particularly active in acid-catalysed reactions.... | 11/04/2003 |
| 6638888 | Mesoporous alumina gel and process for its preparation The present invention relates to a mesoporous gel comprising an alumina matrix in which one or more oxides selected from silica, boron oxide, phosphorus oxide, oxides of metals of groups VIII and VIB, may be uniformly dispersed. The present invention also... | 10/28/2003 |
| 6566105 | Process for the production of D--amino acids A process is described for the production of D--amino acids by the stereospecific conversion of racemic mixtures of 5-substituted hydantoins using a microorganism transformed with a plasmid which expresses an enzymatic system which converts the hyd... | 05/20/2003 |
| 6379417 | Nickel cermet anodic material for fuel cell anode The present invention provides a nickel cermet, which includes: 35% to 70% by weight of a nickel phase, and 65% to 30% by weight of zirconium oxide phase, wherein the zirconium oxide is stabilized in cubic form by 5 to 20 moles of yttrium oxide for each 100 moles o... | 04/30/2002 |
| 6071485 | Process for the preparation of a micro-meso porous material with a high surface area and controlled distribution of the porosity The present invention relates to a process for the preparation of a micro-meso porous material which comprises: a) preparing a mixture starting from a tetraalkylorthosilicate, a C3 -C6 alkyl alcohol or dialcohol, a tetraalkylammonium hydr... | 06/06/2000 |
| 6037303 | Superacid catalyst for the hydroisomerization of n-paraffins and process for its preparation A superacid catalyst comprising zirconium oxide having a purely tetragonal crystalline phase structure and whose surface has sulfate groups thereon in a quantity corresponding to the total coverage of the surface of the zirconium oxide by a monolayer of s... | 03/14/2000 |
| 5993764 | Nitrogen oxide-reducing catalyst and process for reducing nitrogen oxides in exhaust gas The present invention provides a NOx reducing catalyst comprising BEA zeolite which is ion-exchanged with Co to have a Co/Al ratio between 0.2 and 0.6 and is loaded with at least one metal selected from among Ca, Sr, Ba, La, Mn, Ag, In, and Ni. The presen... | 11/30/1999 |
| 5993768 | Mesoporous crystalline composition with a high surface area of a tetravalent metal which can be used as catalyst Solid mesoporous crystalline composition of a pyrophosphate-phosphate of a tetravalent metal, with a high surface area and narrow distribution of the mesopores, having formula (I): M(P2 O7)1-z (HPO4)2z ... | 11/30/1999 |
| 5985225 | Nitrogen oxides reduction catalyst and process for reducing nitrogen oxides in exhaust gas The present invention relates to a catalyst for reduction of nitrogen oxides in exhaust gas containing oxygen by hydrocarbons, which comprises cobalt-loaded zeolite not showing a Raman spectral band assignable to cobalt oxide (Co3 O4... | 11/16/1999 |
| 5981419 | Difunctional catalyst effective in wax hydroisomerization and process for preparing it Process for the hydroisomerization of n-paraffins in the presence of a difunctional catalyst which comprises: (a) a porous crystalline material isostructural with beta-zeolite selected from boro-silicate (BOR-B) and boro-alumino-silicate (AL-BOR-B) in which ... | 11/09/1999 |
| 5910299 | ERS-10 zeolite and process for its preparation A porous, crystalline material, designated ERS-10 zeolite, having in its calcined and anhydrous form a molecular composition of oxides corresponding to the formula (I): mM2/n O.zX2 O3.YO.sub.2 (1) wherein m,... | 06/08/1999 |
| 5892080 | Mesoporous crystalline acid composition of a diphosphonate-phosphite of a tetravalent metal which can be used as a catalyst Solid mesoporous crystalline composition of diphospho-nate-phosphite of a tetravalent metal, with a limited distribution of mesopores having the formula M(O3 P--R--PO3)1-x-y (HPO3)2x (O3 ... | 04/06/1999 |
| 5869298 | Stable mutants of D-N--carbamoylase and process for preparing D--amino acids The present invention relates to mutants of D-N--carbamylase wherein at least one of the cysteines in position 243, 250 and 279 of the amino acid sequence of the wild type enzyme is substituted with a different residue selected from natural amino a... | 02/09/1999 |
| 5807710 | Nucleic acids encoding stable mutants of D-N--carbamoylase The present invention relates to mutants of D-N--carbamylase wherein at least one of the cysteines in position 243, 250 and 279 of the amino acid sequence of the wild type enzyme is substituted with a different residue selected from natural amino a... | 09/15/1998 |
| 5659101 | Catalytic system and process for the production of polydiolefins A catalytic system to polymerize diolefinic monomers consists of a lanthanide salt, an organometallic compound of a metal belonging to groups I, II and III of the periodic table of elements and an organometallic compound of boron. The polymers obtained ar... | 08/19/1997 |
| 5627119 | Catalytic system and process for the production of poydiolefins A catalytic system to polymerize diolefinic monomers consists of a lanthanide salt, an organometallic compound of a metal belonging to groups I, II and III of the periodic table of elements and an organometallic compound of boron. The polymers obtained ar... | 05/06/1997 |
| 5344548 | Solid state sensor device for the determination of the concentration of gases which can react with hydrogen A solid-state sensor device for determining the concentration of gases which can react with hydrogen, in particular oxygen, is disclosed, which is essentially composed of a solid-state protonic conductor put into contact, at one of its sides, with a refer... | 09/06/1994 |
| 4732890 | Retro-inverso hexapeptide neurotensin analogs, process for their preparation and pharmaceutical compositions containing them Hexapeptides with vasodilating and hypotensive activity are described corresponding to the formula: ##STR1## wherein: X is a hydrogen atom or an acyl radical R3 -CO- wherein R3 is a straight or branched (C1 -C7 | 03/22/1988 |
