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INVENTOR: Samuel Hopkins
TITLE OF INVENTION: Pot and Pearl Ashes
DATE ISSUED: July 31, 1790
July 31, 1790
US Patent Class: 423/208
The United States
To all to whom these Presents shall come. Greeting.
Whereas Samuel Hopkins of the City of Philadelphia and state of Pennsylvania hath discovered an Improvement, not known or used before, such Discovery in the making of Pot ash and Pearle ash by a new Apparatus and Process, that is to say, in the making of Pearle ash 1st, by burning the rdw Ashes in a Furnace, 2nd, by dissolving and boiling them when so burnt in Water, 3rd, by drawing off and settling the Slry, and 4th, by boiling the Slry into Salts which then are the true Pearle ash, and also in the making of Pot ash by fluocing the Pearl ash so made as aforesaid, which Operation of burning the raw Ashes in a Furnace, preparatory to their Dissolution and boiling in water, is new, leaves little Residium; and produces a much greater quantity of Salt: These are therefore in pursuance of the Act, entitled “An Act to promote the Progress of useful Arts,” to grant the said Samuel Hopkins, his Heirs, Administrators and Assigns, for the Term of fourteen Years, the sole and exclusive Right and Liberty of using and vending to others the said Discovery of burning the raw ashes previous to their being dissolved and boiled in water, according to the true Intent and Meaning of the Act aforesaid. In Testimony whereov I have cause these letters to be made patent, and the Seal of the United States to be hereunto affixed. Given under my Hand at the City of New York this thirty first Day of July in the Year of our Lord one thousand seven hundred & Ninety.
G. Washington
City of New York, July 31st, 1790. –
hereby do certify the foregoing Letters Patent were delivered to me )
In pursuance of the Act, entitled “An Act to promote the Progress of useful )
Arts;” that I have examined the same, and find them conformable to the )
Said Act. )
Edm. Randolph Attorney General for the United States
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