This inventor holds 6 USPTO granted patents and 1 published patent application and 4 EPO patents. Top assignee: Weyerhaeuser Nr Company. Active years: 2012-2015.
Company Filing History:
Years Active: 2012-2015
Title: The Innovative Contributions of David J O'Callaghan
Introduction
David J O'Callaghan is a notable inventor based in Bonney Lake, WA (US). He has made significant contributions to the field of cementitious materials, holding a total of 6 patents. His work focuses on improving the properties of cement through innovative methods.
Latest Patents
O'Callaghan's latest patents include a method for internally curing cement-based materials. This method involves adding a fibrillated carboxyalkyl cellulose, cellulose alkylsulfonic acid, phosphorylated cellulose, or sulfated cellulose during the mixing process. These additives help reduce the autogenous shrinkage of the cementitious material. Another patent details a method that incorporates carboxylated bleached wood pulp fiber, which also aims to minimize shrinkage in cement mixtures.
Career Highlights
Throughout his career, David J O'Callaghan has worked with prominent companies such as Weyerhaeuser Company and International Paper Company. His experience in these organizations has contributed to his expertise in the field of materials science and engineering.
Collaborations
O'Callaghan has collaborated with notable colleagues, including John A Westland and Sherry L Thomson. These partnerships have likely enhanced his research and development efforts in cementitious materials.
Conclusion
David J O'Callaghan's innovative work in the field of cement-based materials showcases his commitment to advancing construction technology. His patents reflect a deep understanding of material properties and their applications in real-world scenarios.