Patents by Inventor Robert L. Billmers

Robert L. Billmers 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).

  • Polysaccharide derivatives containing aldehyde groups, their preparation from the corresponding acetals and use as paper additives
    Patent number: 4741804
    Abstract: Polysaccharide aldehydes having the formula ##STR1## starch, cellulose, and gum aldehydes, are useful for imparting wet, dry, or temporary wet strength to paper. They are prepared by a non-oxidative method which involves reacting the polysaccharide base, in the presence of alkali, with a derivatizing acetal reagent having the general structure ##STR2## and then hydrolyzing the acetal by adjusting the pH to less than 7, preferably 2-4. In the formula, n is 1-3; R.sup.11 and R.sup.12 are independently an alkyl, aryl, aralkyl, or alkaryl group when n is 1, R.sup.11 or R.sup.12 is one of the groups when n is 2, or R.sup.11 and R.sup.12 are not present when n is 3; R.sup.13 is an alkyl group, optionally containing an ether linkage, or an aryl, aralkyl, or alkaryl group; R.sup.14 and R.sup.15 are individually a hydrogen or a methyl group; R.sup.16, R.sup.17, and R.sup.18 are individually an alkyl group; Y.sup.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: May 3, 1988
    Assignee: National Starch and Chemical Corporation
    Inventors: Daniel B. Solarek, Patrick G. Jobe, Martin M. Tessler, Robert L. Billmers, Diane J. Lamb, John J. Tsai
  • Polysaccharide derivatives containing aldehyde groups, their preparation from the corresponding acetals and use as paper additives
    Patent number: 4703116
    Abstract: Polysaccharide aldehydes having the formula Sacch--O--CH.sub.2 --CH.dbd.CH--CHO, ##STR1## such as starch, cellulose, and gum aldehydes, are useful for imparting wet, dry, or temporary wet strength to paper. They are prepared by a non-oxidative method which involves reacting the polysaccharide base, in the presence of alkali, with a derivatizing acetal reagent having the general structure ##STR2## and then hydrolyzing the acetal by adjusting the pH to less than 7, preferably 2-4. In the formulas, n is 1-3; R.sup.11 and R.sup.12 are independently an alkyl, aryl, aralkyl, or alkaryl group when n is 1, R.sup.11 or R.sup.12 is one of the groups when n is 2, or R.sup.11 and R.sup.12 are not present when n is 3; R.sup.13 is an alkyl group, optionally containing an ether linkage, or an aralkyl group; R.sup.14 and R.sup.15 are individually a hydrogen or a methyl group; R.sup.16, R.sup.17, and R.sup.
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: October 27, 1987
    Assignee: National Starch and Chemical Corporation
    Inventors: Daniel B. Solarek, Patrick G. Jobe, Martin M. Tessler, Robert L. Billmers, Diane J. Lamb, John J. Tsai