Location History:
- Westerville, OH (US) (1988)
- Worthington, OH (US) (1989)
- Upper Arlington, OH (US) (1994)
- Columbus, OH (US) (1976 - 1999)
Company Filing History:
25 out of 632 
7 out of 240 
1 out of 25 Years Active: 1976-1999
Title: William R. Dunnavant: Innovator in Benzylic Ether Phenolic Resole Resins
Introduction
William R. Dunnavant is a prominent inventor based in Columbus, OH, known for his innovative contributions to the field of resins. With an impressive portfolio of 33 patents, he has made significant strides in the development of benzylic ether phenolic resole resins, which are crucial in the manufacturing of foundry cores and molds.
Latest Patents
Dunnavant's latest patents focus on the preparation and application of benzylic ether phenolic resole resins. His pioneering work covers two main patents related to this innovation. The first patent describes the method for preparing these resins in a sealed reaction vessel by heating phenol and an aldehyde, along with a divalent metal catalyst. Importantly, this process allows for the generation of water during the reaction, which is not removed until the resin reaches its optimal endpoint. The resulting resins are preferred to be free or essentially free of unreacted formaldehyde, making them suitable for use in phenolic-urethane foundry binders. This technology plays a vital role in the creation of foundry cores and molds utilized in metal casting processes.
Career Highlights
Throughout his career, Dunnavant has worked with well-known companies such as Ashland Oil, Inc. and Ashland, Inc. His extensive experience in these organizations has contributed to his professional growth and the development of his innovative patents.
Collaborations
Dunnavant has collaborated with notable colleagues, including Heimo J. Langer and Robert Bernard Fechter. These partnerships have fostered a productive exchange of ideas and advancements in resin technology.
Conclusion
William R. Dunnavant stands out as a key figure in the development of benzylic ether phenolic resole resins. His innovative patents and collaborative endeavors have paved the way for advancements in foundry technology, demonstrating his significant impact on the industry.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.