Quick miner's pan
US4273648A · kind A · utility
8Cited by
6References
4Claims
0Family size
Inventor
Key dates
| Filing date | Mar 10, 1980 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Mar 10, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03B5/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pan for separating gold or other precious heavy metals from wet sand or gravel is provided with a round bottom joined to obliquely rising sides at the circumference. Near the center of the bottom of the pan is an aperture leading to a trough which is formed integrally with the bottom and slopes downwardly therefrom. Within the trough is a ladder-like structure having a plurality of steps which collect the heavy metal particles from the dross.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.