| Patents for Samuel Witherill Jr. |
Patents 1 -
4
of 4
      |
| Number | Date | Patentee | Title | Type |
| 1,599X | Oct. 29, 1811 | S. Witherill, Jr. | Mode of washing white lead | manufacturing potash |
| 1,600X | Oct. 29, 1811 | S. Witherill, Jr. | Setting the beds or stacks (by admission of air) in making white lead | manufacturing potash |
| 1,601X | Nov. 01, 1811 | S. Witherill, Jr. | Screening and separating in water the corroded parts of lead from the uncorroded parts in the process of making white lead | manufacturing potash |
| 1,602X | Nov. 01, 1811 | S. Witherill, Jr. | Machine for separating the oxidated from the metallic lead in the process of manufacturing red lead and of the manner of using the machine | manufacturing potash |
