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US Patent: 61X
Furnace for pot and pearl ashes
Edward Ryan - Philadelphia, PA

USPTO Classifications:

Tool Categories:
specialty machines : industrial furnaces


Not known to have been produced


Patent Dates:
Granted: Apr. 29, 1793

Patent Pictures:
USPTO pdf tiff
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Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. Only the patent drawing is available. This patent is in the database for reference only.

Text of this patent's sale:

This indenture… between Edward Ryan of the City of Philadelphia and State of Pennsylvania of the one part, and Thomas Tourey of the City of Vergennes in the State of Vermont of the other part… Manuscript document providing for the sale of a patent on a furnace for $2020, with the last installment payment being due in 1800. The text of the indenture repeats the text of a patent issued in 1793 to “Edward Ryan citizen of the State of Pennsylvania in the United States hath alleged that he hath invented a new and useful improvement in the construction of a Furnace for manufacturing Pot and Pearl Ashes… has made oath that he does verily believe that he is the true inventor

The USPTO link goes to a reissued patent for a gridiron that is unrelated to this furnace patent.

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