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Class Information
Number: 204/901
Name: Chemistry: electrical and wave energy > Effecting a color change by wave energy
Description: Subject matter involving a process of effecting a color change in a material through the use of wave energy.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6696587 |
Process for treating aminosilane discolorations |
Feb. 24, 2004 |
| 5994579 |
Process for lightening the color of polymeric diphenylmethane diisocyanate and the use of brightened diphenylmethane diisocyanate in the production of polyurethane |
Nov. 30, 1999 |
| 5622259 |
Reduction of discoloration in plastic materials |
Apr. 22, 1997 |
| 5302259 |
Method and apparatus for altering the properties in light absorbing material |
Apr. 12, 1994 |
| 5171762 |
Process for improving the color of a polymer |
Dec. 15, 1992 |
| 5106605 |
Color restored radiation discolored salt compositons and methods for color restoration |
Apr. 21, 1992 |
| 4792341 |
Hair photobleaching |
Dec. 20, 1988 |
| 4676880 |
Photolysis of lactones |
Jun. 30, 1987 |
| 4289593 |
Method for increasing the ultra-violet light transmittance of ethylene glycol |
Sep. 15, 1981 |
| 4014769 |
Production of coformycin and intermediates therefor |
Mar. 29, 1977 |
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