Patents by Inventor Ned A. Speizer

Ned A. Speizer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6120579
    Abstract: The present invention relates to a process for cleaning mercury-contaminated soils that is simple, efficient and safe to use. This process can also be used to clean soils contaminated with additional metals, such as zinc, copper and lead, at a lower pH. The invention involves treating contaminated soils with solid hypochlorite in a continuous counter-current process.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: September 19, 2000
    Assignee: Merck & Co., Inc.
    Inventors: Youssef El-Shoubary, Subash C. Seth, William F. Lavosky, Ned A. Speizer
  • Patent number: 6096223
    Abstract: The present invention relates to a process for treating contaminated water to precipitate metals without increasing the total dissolved solids content. In particular, the invention relates to the use of phosphoric acid and calcium hydroxide or calcium oxide to adjust the pH of chromium contaminated groundwater during the treatment process without increasing the total dissolved solids (TDS).
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: August 1, 2000
    Assignee: Merck & Co., Inc.
    Inventors: Youssef El-Shoubary, Subash C. Seth, Ned A. Speizer
  • Patent number: 5968461
    Abstract: The present invention relates to a process for cleaning mercury-contaminated soils that is simple, efficient and safe to use. This process can also be used to clean soils contaminated with additional metals, such as zinc, copper and lead, at a lower pH. The present invention involves screening the contaminated soil to remove unwanted materials, leaching the contaminated soils with hypochlorite in a screw reactor, thickening, leaching with hypochlorite and sodium chloride, thickening again and then separating the mercury-containing liquids from the clean soil. This invention also relates to a process which uses sulfide to treat the mercury-containing liquids.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: October 19, 1999
    Assignee: Merck & Co., Inc.
    Inventors: Youssef El-Shoubary, William F. Lavosky, Subash C. Seth, Ned A. Speizer