David M Harriss

Title: **Innovative Contributions of David M. Harriss in Gypsum-Based Substrates**

Introduction

David M. Harriss, an inventive mind based in Chesterfield, VA, has made significant contributions to the field of construction materials with a focus on gypsum-based substrates. With a total of four patents to his name, Harriss has demonstrated a deep commitment to innovation and improving construction practices.

Latest Patents

Among David's latest innovations are two notable patents that enhance the durability and efficacy of gypsum board. The first patent addresses the creation of a **fungus resistant gypsum-based substrate**. This invention relates to a gypsum board that comprises first and second polymeric fibrous sheets with a gypsum core positioned between them. The gypsum core is formulated to contain less than 0.03% of additives that could serve as fungus nutrients, and less than 0.5% dry gypsum core also contains fungus nutrients. Importantly, the fibrous sheets are nonwoven, and the gypsum core may also contain fungicidal properties. The invention outlines an effective process for creating this fungus resistant gypsum board.

David's second patent focuses on a **gypsum-based construction material** and details a process for manufacturing a gypsum-based substrate. This involves mixing gypsum and water to create a gypsum slurry, followed by the application of a synthetic polymeric fibrous sheet on one side of the slurry layer. The method requires an adhesive strength of at least 7.5 lb to effectively bond the wet gypsum to the fibrous sheet. This patent also introduces a gypsum board made from first and second polymeric fibrous sheets adhered to opposite sides of a wet gypsum core, highlighting enhanced structural integrity.

Career Highlights

David has held pivotal roles in notable companies throughout his career, including E.I. DuPont de Nemours and Company. His work has been instrumental in advancing technologies within the construction sector, further established by his innovative patents.

Collaborations

Harriss has collaborated with talented professionals in his field, including Robert Byron Bruce and David Jackson McGinty. These partnerships have likely enriched his work and fostered a collaborative approach to research and development in gypsum materials.

Conclusion

David M. Harriss stands out as a key inventor in the area of gypsum-based construction materials. His recent patents not only reflect his innovative spirit but also contribute to making building practices more resistant to environmental challenges, particularly regarding fungal growth. As he continues to innovate, Harriss exemplifies how dedicated inventors can shape and improve industries through their work.