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Process of Mining Sulfur.

Description: Patent for innovations in the underground fusion or Frasch process of mining sulfur, "which comprises conducting an appropriate fusing medium [such as hot water] into the formation containing the sulfur deposit and thereby melting the sulfur" (lines 91-95). Central to the innovations is the use of a compressed gas to "eliminate or largely reduce heat losses in porous rock and exhausted sulfur regions at the higher levels of the mine where the presence of the hot water is of no benefit so far as… more
Date: December 27, 1921
Creator: Drachenberg, August Toby
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Brush Cylinder for Gins.

Description: Patent for a brush cylinder for gins which "aims to provide novel and improved means for securing the brush sticks in place and for enabling them to be readily removed and replaced." (lines 9-12) including instructions and illustrations.
Date: December 29, 1914
Creator: Robertson, B.A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Plastic Fence-Post.

Description: Patent for a plastic fence post that wire fencing or wooden rails can be attached to that has the connection areas on the post hollowed out to protect the parts from the weather.
Date: December 24, 1907
Creator: Libhart, Hugh P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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