Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 4707405 | Cyanamide salts of non-lead metals as corrosion inhibitive pigments in mirror back coatings Compositions of the invention comprise an organic film-forming resin and a cyanamide salt of a non-lead metal. The composition, when applied to a thin metallic film, inhibits degradation of the thin metallic film as compared to the composition without cal... | 11/17/1987 |
| 4634602 | Primer composition Compositions of the invention comprise a radiation sensitive compound having ethylenic unsaturation and at least one moiety selected from the group consisting of a urea moiety, a urethane moiety and mixtures thereof, a radiation insensitive compound havin... | 01/06/1987 |
| 4632957 | Ethylenically unsaturated ethylene and propylene ureas containing alkylene urea groups or alkylene urethane groups, useful in coating compositions Disclosed is a compound having the formula: ##STR1## wherein m is two or three; n is an integer from one to four; R is selected from the group consisting of: alkyl having one to six carbon atoms, hydrogen, HOCH2 --and R"O(CH2)a... | 12/30/1986 |
| 4591518 | Acrylic functional urethane alkyd resin coating compositions An air oxidizable coating composition is disclosed comprising an ungelled urethane modified alkyd resin containing pendant polymerizable unsaturated groups attached to the alkyd through urethane linkages. The ungelled urethane modified alkyd is the reacti... | 05/27/1986 |
