Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4025512 | 6A-Azacannabinoids A compound of the formula ##STR1## wherein n = 2 or 3; R1 is a C3 -C20 alkyl or arylalkyl; R2 is loweralkyl or phenyl; and R3 is H or replaces the hydrogens in (CH2)n with C... | 05/24/1977 |
| 4014658 | Solvent vapor venting dust cover unit for fraction collector turntable A solvent vapor venting dust cover unit which automatically vents all volatile solvent vapors arising during the fraction collection procedure.... | 03/29/1977 |
| 3947462 | 2,4,7-substituted 5-hydroxy benzopyrans and esters 2,4,7-Substituted 5-hydroxy benzopyrans and dihydrobenzopyrans and their esters represented by the formulae ##SPC1## Wherein each R1 is loweralkyl, and R2 is hydrogen, loweralkanoyl or ##SPC2## With Y being a straight or branche... | 03/30/1976 |
