Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 5128488 | Process for the asymmetric hydrogenation of carbonyl compounds obtained The asymmetric hydrogenation of carbonyl compounds is carried out in the presence of at least one transition metal complex MZq(M=metal of group VIII of the Periodic Classication; Z=ligand selected among the atoms and the molecules which may complex the me... | 07/07/1992 |
| 5099077 | Chiral phosphorus compounds, a process for their manufacture and their application to the catalysis of enantioselective synthesis reactions A method of using a chiral phosphorus-containing ligands comprising at least one amine radical and at least one dihydrocarbylphosphioxy radical of the formula W=OP (R)2 ; from the group consisting of: those of the formula ##STR1## those of... | 03/24/1992 |
| 4963617 | Low temperature self-crosslinkable polymer compositions and processes The invention relates to a crosslinking process for self-crosslinking (meth)acrylic copolymers soluble in organic solvents and characterized in that: a dispersion or solution having a solids content of between 30 and 80% by weight and a viscosity of betwe... | 10/16/1990 |
| 4956224 | Articles produced from a laminate and process for their manufacture Article produced from a laminate comprising at least one thermoplastic resin layer (A), at least one fibre-reinforced heat-cured resin layer (B) and at least one adhesive layer (C) intermediate between layers (A) and (B). It is of complex shape and the ra... | 09/11/1990 |
| 4933213 | Crosslinking process The invention relates to a crosslinking process for self-crosslinking copolymers essentially based on (meth)acrylic monomers and is characterized in that, on or before the deposition of a layer containing at least one crosslinking catalyst, a second layer... | 06/12/1990 |
| 4927617 | Process of producing concentrated solutions of ammonium nitrate Process for producing concentrated solutions of ammonium nitrate by neutralization of nitric acid with ammonia in a pipe reactor. When the global flow of reactives corresponds to an output higher than 150 kg/h/cm2 neutralization is performed in the ... | 05/22/1990 |
| 4874859 | Di-bishydroxypropyl cyanuric acid, trisubstituted derivatives thereof and a process for their preparation The subject of the invention is new derivatives (I) and (II) of cyanuric acid which have the formula, respectively, ##STR1## in which: R' and R" are --CH2 --CH(OH)--CH2 OH and R is an alkyl containing a polymerizable ethylenic functi... | 10/17/1989 |
| 4859793 | Process for the production of fluoroalkyl acrylates A process for the preparation of fluoroalkyl (alk)acrylates, having the formula: ##STR1## where R1 is a hydrogen atom, or an alkyl group having up to 4 carbon atoms, n is between 1 and 20, and m is between 0 and n, in which an (alk)acrylic... | 08/22/1989 |
| 4831094 | Articles having shape recovering properties and a method for using it Articles having shape recovering properties and methods of using them are disclosed. An article is formed from a composition containing a norbornene polymer by forming said polymer into an article having a first shape, then deforming the article in the so... | 05/16/1989 |
| 4729442 | Apparatus for the weighted dosing of granulated or pulverulent products Apparatus making it possible to effect accurately in line and continuously the weight feeding of granulated or pulverulent products. It comprises two separated endless belts for extraction and dispensing. The endless belt of the dispenser is continuously weigh... | 03/08/1988 |
| 4690800 | Process for reducing the chances of ignition and explosion due to the decomposition of high-pressure industrial process gases The danger of explosion due to decomposition of high-pressure industrial process gases, such as ethylene, is reduced by beginning to cool the decomposition gases with a delay of no more than 25 milliseconds from the onset of flow of the gases out of a hig... | 09/01/1987 |
| 4659433 | Concentrating and dehydrating apparatus for maleic anhydride Apparatus for concentrating and dehydrating maleic acid to form maleic anhydride, comprising: at least a first and a second vertical, independent and distinct, falling thin-film, multitubular evaporators of the static type arranged in series, wherein the ... | 04/21/1987 |
| 4650841 | Continuous process for the manufacture of ethylene homopolymers or ethylene copolymers The process, which comprises a first stage for (co)polymerizing ethylene at 180°-320° C. and 300-2,500 bars in the presence of a Ziegler type catalytic system, a second stage for separation, a third stage for recycling unreacted monomers, and a fourth, ... | 03/17/1987 |
| 4650820 | Bitumen-polymer compositions for the preparation of road surface binders The present invention provides a bitumen-polymer composition comprising 95 to 99% by weight of a bitumen and 1 to 5% by weight of a terpolymer having a melt index between 5 and 50 dg/min. The terpolymer comprises 88 to 98.7 mol % of units derived from eth... | 03/17/1987 |
| 4624823 | Blown tubing method and apparatus Apparatus for cooling plastic film or sheet obtained by blowing tubing, comprising at its intermediate section an intensive blowing ring for directing air towards the tubing and at its upper section an upper chamber in which the tubing is in contact with ... | 11/25/1986 |
| 4622209 | Process and apparatus for reducing the chances of ignition and explosion due to the decomposition of high-pressure industrial process gases The danger of explosion due to decomposition of high-pressure industrial process gases, such as ethylene, is reduced by beginning to cool the decomposition gases with a delay of no more than 25 milliseconds from the onset of flow of the gases out of a hig... | 11/11/1986 |
| 4599212 | Laminates having an improved finishing layer Reinforced phenolic laminates are provided with a finishing coat of a butylated phenol-formaldehyde resin, thereby removing surface irregularities. The finishing coat can be mass-pigmented to the desired color, thereby obviating the necessity of any addit... | 07/08/1986 |
| 4593140 | Process for dimerizing conjugated dienes The process according to the invention consists in dimerizing a conjugated diene in the presence of a catalyst obtained by bringing together (A) at least one nickel complex of formula NiZq in which q is the coordination number of the nickel and... | 06/03/1986 |
| 4585839 | Catalyst containing an aromatic silicon compound for the polymerization of ethylene A catalyst for the polymerization of ethylene comprising at least one halogenated compound of a transition metal of Groups IV to VI of the Periodic System and at least one aromatic silicon compound having the formula $c;n Si(OH)4-n | 04/29/1986 |
| 4563504 | Propylene and ethylene/-olefin copolymer combinations applicable to the manufacture of mono-oriented yarns A combination of at least one propylene polymer and at least one ethylene/-olefin copolymer wherein the combination comprises: (a) 10 to 40 weight percent isotactic polypropylene; and (b) 60 to 90 weight percent ethylene/-olefin copolymer, w... | 01/07/1986 |
| 4555544 | Hardening phenol-formaldehyde resols in the presence of aniline In a process for hardening phenol-formaldehyde resol resins, comprising conducting the hardening of the resins with an acidic solution of water and/or an organic solvent having dissolved therein an aromatic sulphonic acid and/or concentrated sulphuric aci... | 11/26/1985 |
| 4549033 | Encapsulation of photocells with acrylic prepolymer Acrylic prepolymer comprising: from 10 to 50% by weight of units derived from at least one alkyl acrylate, the alkyl group having from 4 to 12 carbon atoms, from 30 to 60% by weight of units derived from at least one alkyl methacrylate, the alkyl group having ... | 10/22/1985 |
| 4537868 | Catalyst containing an aromatic silicon compound for the polymerization of ethylene A catalyst for the polymerization of ethylene comprising at least one halogenated compound of a transition metal of Groups IV to VI of the Periodic System and at least one aromatic silicon compound having the formula $c;n Si(OH)4-n | 08/27/1985 |
| 4486579 | Modified copolymers of ethylene and -olefins and a process for their preparation A modified copolymer of ethylene and of at least one -olefin having from 3 to 12 carbon atoms, comprising from 0.5 to 10 mole percent of units derived from the -olefin, wherein the measured limiting viscosity of the copolymer is between 1.5 ... | 12/04/1984 |
| 4476288 | Catalysts comprising magnesium and a transition metal A catalyst comprising the product obtained by bringing into contact (a) a compound of magnesium comprising at least one species selected from the group consisting of magnesium monohalides (MgX), halo-magnesium hydrides (HMgX) and magnesium hydride (MgH | 10/09/1984 |
| 4474931 | Energy-saving process for manufacturing polyethylene and the related manufacturing device Polyethylene is produced in at least one reactor under a pressure of 800 to 2500 bars and a temperature of 150° to 350° C., and the reaction mixture exiting the reactor through an expansion valve and supplied to a separator under a pressure of 50 to 400... | 10/02/1984 |
| 4469847 | Process for preparing graft styrene copolymers A process for preparing graft styrene copolymers is effected by a two-stage polymerization of styrene in the presence of an EPDM elastomer and styrene block copolymer. The resultant graft styrene copolymer has a fine microstructure, good impact resistance... | 09/04/1984 |
| 4465781 | Halogenated catalyst for ethylene polymerization containing a transition metal and magnesium and process for its preparation A halogen-containing catalyst for the polymerization of ethylene or copolymerization of ethylene and -olefins having from 3 to 8 carbon atoms and a process for their preparation. The catalyst has the general formula: Mn Mg(OR)2-m | 08/14/1984 |
| 4436859 | Polynorbornenes cured with isocyanates and optionally with polyols Polynorbornenes are cured with isocyanates optionally in the presence of polyols to yield elastomeric products having improved mechanical properties, particularly improved compression moduli and residual set while retaining the desired rebound elasticity ... | 03/13/1984 |
| 4424330 | Ethylene-propylene copolymers A copolymer based on ethylene and propylene, having a density of between 0.933 and 0.946 g/cm3 and a melt index of between 2 and 10 dg/min, wherein the copolymer has from 3 to 27 alkyl groups per 1000 carbon atoms in the molecule and wherein it... | 01/03/1984 |
| 4424289 | Continuous process for the manufacture of quick-setting phenolic foams A continuous process for manufacturing quick-setting phenolic foams is improved by using as the hardening agent a concentrated, substantially anhydrous solution of boron trioxide, and using as the blowing agent an organic liquid having a boiling point of ... | 01/03/1984 |
| 4420417 | Ethylene polymerization catalyst and a process for its preparation An ethylene polymerization catalyst having the general formula Mn Mg(OR)2+4n-m Xm, wherein R is an alkyl radical containing from 1 to 4 carbon atoms, M is a transition metal of groups IVa to VIa of the Periodic Table, X is... | 12/13/1983 |
| 4412896 | Process of preparation of graft copolymer of styrene and an EPDM rubber A process of preparation of a graft copolymer of (a) styrene and (b) an EPDM rubber by mass polymerization followed by irradiation, for example electron irradiation.... | 11/01/1983 |
| 4396532 | Activator comprising a dialkylaluminum monofluoride for the polymerization of ethylene A polymerization activator for polymerizing ethylene comprising a dialkylaluminum monofluoride mixed with minor amounts of at least one of dialkylaluminum hydride or halide and a trialkylaluminum. The activator preferably corresponds to the general formul... | 08/02/1983 |
| 4388219 | Catalyst for polymerizing ethylene, comprising compounds of several transition metals, and a polymerization process using said catalyst A catalyst for polymerizing ethylene, especially at high temperature and high pressure, comprising at least two halogen compounds of transition metals, one of which is a titanium trichloride syncrystallized with aluminum chloride. The catalyst has the for... | 06/14/1983 |
| 4379068 | Hydrophilic cotelomers having a terminal sulfonate group and containing acid and amine functions, and their application in detergent compositions Hydrophilic cotelomers having a terminal sulphonate group, and having the formula: ##STR1## wherein R1, R2, R3 and R4 are each independently H or C1-4 alkyl; M is H or an alkali metal; M' is an a... | 04/05/1983 |
| 4365001 | Laminates of improved fire resistance There are obtained laminates of improved fire resistance comprising a substrate of reinforced phenolic resin, directly coated on at least one side thereof with a surface layer of a furan resin, and bonded to the outer surface of the furan resin a "gel-coa... | 12/21/1982 |
| 4344925 | Ozone whitening of synthetic gypsum A process for the whitening of phosphogypsum comprising treating a phosphogypsum in aqueous suspension with an amount of ozone equal to at least 150 parts by weight per million parts by weight of phosphogypsum calculated as Ca SO4.2H.sub.2 O, t... | 08/17/1982 |
| 4339392 | Process for reducing metallic halides in the vapor phase by means of solid organomagnesium compounds and catalytic components resulting therefrom A catalytic component having the formula wherein M is a metal selected from group VI B and group V B of the Periodic Classification, X is a halogen, R is a hydrocarbon radical, 2ࣘa ࣘ3.5, 1ࣘbࣘ30, 1ࣘcࣘ8 and 0ࣘdࣘ10 is prepared by reducing a m... | 07/13/1982 |
| 4339412 | Apparatus for reducing the chances of ignition and explosion due to the decomposition of high-pressure industrial process gases The danger of explosion due to decomposition of high-pressure industrial process gases, such as ethylene, is reduced by maintaining in an inert atmosphere at least part of an evacuation system included between a pressurized vessel within which the decompo... | 07/13/1982 |
