DH

Douglas Hillshafer

ST Stepan: 5 patents #48 of 221Top 25%
The Dow Chemical: 4 patents #847 of 4,115Top 25%
TR The Firestone Tire & Rubber: 1 patents #111 of 233Top 50%
Overall (All Time): #535,903 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12291673 Polyester diverting agents for low-temperature oil wells Sarah Wolek 2025-05-06
11898096 Polyester diverting agents for low-temperature oil wells Sarah Wolek 2024-02-13
9487467 Method for producing ο-phthalate polyester polyols with low cyclic ester content Andrew Guo 2016-11-08
9284518 Multi-arm hydrophilic urethane polymers, methods of making them, and compositions and processes employing them Ronald A. Masters, Christopher A. Gariepy 2016-03-15
6569352 Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefrom George Magnus 2003-05-27
4868223 Use of amine initiated butylene oxide polyols in polyurethane products Donald L. Nelson, Douglas P. Waszeciak 1989-09-19
4814411 Increased reactivity of isocyanate terminated polyether prepolymers with metal halide salt complexes of methylenedianiline Tristram W. Bethea, James Oziomek, Joseph H. Tazewell, Louis W. Meyer 1989-03-21
4687788 Dimensionally stable urethane elastomers Robert B. Turner 1987-08-18
4478941 Method for determining component ratios employed to prepare polymers 1984-10-23