Patents by Inventor Scott D. Rothstein

Scott D. Rothstein 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).

  • Method of making ketals and acetals
    Patent number: 8604223
    Abstract: The reaction of alcohols with oxocarboxylates to form acetals or ketals is catalyzed by unexpectedly low levels of protic acids. By employing low acid catalyst levels compared to amounts conventionally used, rapid formation of acetal or ketal is facilitated while the formation of oxocarboxylate esters is minimized. Further employing a significant molar excess of oxocarboxylate in conjunction with low acid catalyst level gives rise to the rapid and clean formation of acetals and ketals from oxocarboxylates and alcohols.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: December 10, 2013
    Assignee: Segetis, Inc.
    Inventors: Sergey Selifonov, Scott D. Rothstein, Brian D. Mullen
  • Method of making ketals and acetals
    Patent number: 8569523
    Abstract: The reaction of alcohols with oxocarboxylates to form acetals or ketals is catalyzed by unexpectedly low levels of protic acids. By employing low acid catalyst levels compared to amounts conventionally used, rapid formation of acetal or ketal is facilitated while the formation of oxocarboxylate esters is minimized. Further employing a significant molar excess of oxocarboxylate in conjunction with low acid catalyst level gives rise to the rapid and clean formation of acetals and ketals from oxocarboxylates and alcohols.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: October 29, 2013
    Assignee: Segetis, Inc.
    Inventors: Sergey Selifonov, Scott D. Rothstein, Brian D. Mullen
  • Polyketal compounds, synthesis, and applications
    Patent number: 8546519
    Abstract: The invention relates to polyketal compounds. The compounds are synthesized by the selective ketalization of oxocarboxylic acids, e.g. keto acids and semialdehydes, and esters thereof with tetrols and higher polyols that products two or more cyclic ketal ester moieties per molecule, wherein the cyclic ketal moieties are situated in a bis-, tris-, or polyketal conformation. The invention further relates to applications of these compounds and subsequent reactions thereof.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: October 1, 2013
    Assignee: Segetis, Inc.
    Inventors: Sergey Selifonov, Scott D. Rothstein, Douglas A. Wicks, Brian D. Mullen, Tara J. Mullen, Jason D. Pratt, Charles T. Williams, Chunyong Wu, Ning Zhou
  • Method of Making Ketals and Acetals
    Publication number: 20100292491
    Abstract: The reaction of alcohols with oxocarboxylates to form acetals or ketals is catalyzed by unexpectedly low levels of protic acids. By employing low acid catalyst levels compared to amounts conventionally used, rapid formation of acetal or ketal is facilitated while the formation of oxocarboxylate esters is minimized. Further employing a significant molar excess of oxocarboxylate in conjunction with low acid catalyst level gives rise to the rapid and clean formation of acetals and ketals from oxocarboxylates and alcohols.
    Type: Application
    Filed: April 9, 2010
    Publication date: November 18, 2010
    Applicant: SEGETIS, INC.
    Inventors: Sergey Selifonov, Scott D. Rothstein, Brian D. Mullen