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 |
| 6696587 | Process for treating aminosilane discolorations A discoloration of an aminosilane having a content of a free base is treated by adding an acid chloride to the aminosilane to obtain a mixture having a molar excess of acid chloride; neutralizing the molar excess of the acid chloride in one or more steps ... | 02/24/2004 |
| 5994579 | Process for lightening the color of polymeric diphenylmethane diisocyanate and the use of brightened diphenylmethane diisocyanate in the production of polyurethane A process for lightening (or decreasing) the color of diphenylmethane diisocyanate by irradiation with light having a wavelength of from 250 nm to 2,500 nm is described. This invention also relates to the use of this brightened diphenylmethane diisocyanat... | 11/30/1999 |
| 5622259 | Reduction of discoloration in plastic materials A method for reducing discoloration in a discolored plastic material which has been subjected to sterilization by gamma radiation which includes exposing the plastic material to light having a wavelength within the range of 200 to 600 nm for a time suffic... | 04/22/1997 |
| 5302259 | Method and apparatus for altering the properties in light absorbing material A method and apparatus are disclosed for altering the properties of light sensitive material, for example, biological material, which has a plurality of randomly spaced light absorbing structures thereon. A beam of light, for example, from a laser, is dir... | 04/12/1994 |
| 5171762 | Process for improving the color of a polymer The color of a polymer, particularly polytetrahydrofuran, is improved by subjecting the polymer to microwave energy of such magnitude and frequency so as to cause a decrease in the APHA color number.... | 12/15/1992 |
| 5106605 | Color restored radiation discolored salt compositons and methods for color restoration Salt compositions which have been discolored during sterilization by means of radioactive radiation such as gamma and/or beta irradiation of the type which causes such discoloration are substantially restored to the original color by treatments disclosed ... | 04/21/1992 |
| 4792341 | Hair photobleaching A method and apparatus for artificially bleaching or lightening hair by exposing the hair to intense radiation of artificial light. The light is typically from a laser or flashlamp source and provides adequate intensity and power during the lifetime of th... | 12/20/1988 |
| 4676880 | Photolysis of lactones The photochemical decarbonylation of lactones and the method of detecting microquantities of ,-diarylglycolate esters comprising an acidic reaction mixture containing the esters and naphthols producing a lactone, decarbonylating the lactone ... | 06/30/1987 |
| 4289593 | Method for increasing the ultra-violet light transmittance of ethylene glycol The ultraviolet light transmittance of ethylene glycol containing ultraviolet light absorbing impurities is increased by exposing the ethylene glycol to ultraviolet radiation at a wavelength of at least 220 nanometers from a controllable ultraviolet radia... | 09/15/1981 |
| 4014769 | Production of coformycin and intermediates therefor This invention relates to a process for the preparation of coformycin, 3-(ଲ-D-ribofuranosyl)-6,7,8-trihydroimidazo[4,5-d][1,3]diazepin-8(R)- ol, through a synthetic route from a new derivative of 9ଲ-D-ribofuranosyl-purine and other synthetic in... | 03/29/1977 |
