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 |
| 7253303 | Fluorination of dicarbonyl compounds The invention provides a method for the preparation of a dicarbonyl compound of formula (I) R1COCFR2COR3 wherein R1 is selected from alkyl, substituted alkyl, cycloalkyl, aryl, substituted aryl and acetoxy, R2 i... | 08/07/2007 |
| 6441232 | Selective nitrogen functionalization of organic compounds There is provided a method of selectively replacing a carbon-hydrogen bond at an unactivated saturated sp3 hybridised carbon atom in an organic compound by a carbon-nitrogen bond, the method comprising reacting the compound with a fluorinating agent in a ... | 08/27/2002 |
| 6388133 | Fluorination of ketoamides A process for the preparation of an N,N-disubstituted-2-fluoro-1,3-ketoamide having the formula RCO.CFR'CONR2 " comprises treating an N,N-disubstituted-1,3-ketoamide having the formula RCO.CHR'CONR2 " with elemental fluorine. The ... | 05/14/2002 |
| 6255518 | Preparation of fluorinated compounds A method for the preparation of a fluorinated Phosphonate having the formula (RO)2 PO CFR'R" comprises treating a phosphonate of the formula (RO)2 PO CHR'R", or a metal salt thereof, with fluorine. R is an alkyl group R' is hydrogen ... | 07/03/2001 |
| 6160161 | Per(poly)fluorinated polyoxyethylated carbamates Per(poly)fluorinated polyoxyethylated carbamates of general formula (I) in which RF represents a perfluorinated group containing between 1 and 18 carbon atoms, W represents an oxo group or nothing, n is an integer from 1 to 10, m is from values... | 12/12/2000 |
| 6054311 | Recovering cryopreserved cells using gassed polyfluorinated compounds After the cryopreservation of living cells, the cells in a post-thaw recovery stage are supported by a gas permeable medium. This medium comprises at least one polyfluorinated compound. This compound may be gassed, for example with oxygen where oxygenatio... | 04/25/2000 |
| 6031139 | Preparation of -fluoroketones The use of polar organic solvent as the solvent in the direct fluorination, to make an -fluoroketone, of an enol ester or enol trialkylsilyl ether of a compound containing a tautomerisable ketone group, the solvent being relatively inert to fluorin... | 02/29/2000 |
| 5847198 | Process for the preparation of esters A process for the preparation of an ester, especially fluorinated esters R1 O.OC--CHR2 --CO.OR3, R1 and R3 are each independently selected from alkyl, cycloalkyl and aryl. R2 is selected fr... | 12/08/1998 |
