Suiter Swantz IP takes a look back at past inventions and inventors with our Patent of the Day.
On this day in 1960, Howard Tracy Hall was granted U.S. Patent No. 2,947,608 for DIAMOND SYTHESIS.
An excerpt from the patent states:
This invention relates to a method for converting non-diamond carbon into diamond and has for its principal object the provision of a method for converting non-diamond carbon into diamond which eliminates the need for determining the temperature at which the conversion takes place and which provides a positive indication of the time at which the conversion takes place.
These and other objects of my invention are accomplished by subjecting a mixture of non-diamond carbon and a suitable catalyst to a pressure of at least 75,000 atmospheres and applying sufficient heat to said mixture for a sufficient length of time to cause an inflection in the electrical resistance of said mixture. Inflection in electrical resistance as used in this application refers to a marked change i the rate of change of electrical resistance.
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