Hand held classifying device
OwnerClarence W. Ashcraftinventor
Life of this patent
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OwnerClarence W. Ashcraftinventor
Estimating the term…
A gold pan (20) and classifying device for separating granular materials of varying specific gravities of generally rectangular shape including two substantially vertical side walls (21), two sloping side walls (22) with laminated plate (24) and edge (25) construction, a gold concentrating trap (33) at the bottom of the four walls with volume of less than one tenth of one percent of total pan volume, a bottom opening (23) and seal (28) for removal of gold concentrates from the concentrating trap (33) through the pan bottom while waste materials are retained in the pan (20). The unique design enables even a beginner to achieve proficiency in minutes while processing much more material than previously possible with existing pans, either with or without the assistance of a liquid medium and with little or no potential for losing fine gold.
A gold pan for classifying granular material contained in a liquid slurry according to their relative specific gravity, the pan comprising:
Dependencies are inferred from the claim text.