This inventor holds 4 USPTO granted patents. Top assignees: Johns Manville, Manville Corporation, Manville Service Corporation. Active years: 1980-1987.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Jefferson County, CO (US) (1980)
- Littleton, CO (US) (1980)
- Conifer, CO (US) (1983)
- Highlands Ranch, CO (US) (1987)
Company Filing History:
2 out of 1,027 
1 out of 151 
1 out of 112 Years Active: 1980-1987
Title: Innovations of Douglas D. Smith
Introduction
Douglas D. Smith is an accomplished inventor based in Littleton, CO (US). He holds a total of 4 patents that showcase his innovative contributions to the field of building materials and shingle production. His work reflects a commitment to enhancing efficiency and sustainability in construction.
Latest Patents
One of his latest patents is for lightweight asphalt-based building materials and the process for making them. This invention features a lightweight asphalt roofing product with a specific gravity of less than 1.0. The coating incorporates a lightweight filler with an effective specific gravity ranging from 0.10 to 0.50, present in the coating at 3% to 25% by weight. The preferred embodiment utilizes filler particles with hollow, gas-filled inclusions, such as expanded perlite or expanded permicite particles.
Another significant patent is the shingle stacker with a shingle inverting feature. This invention addresses the stacking of shingles that have one edge thicker than the other. It allows for the quick and accurate formation of a neat stack of shingles by enabling selected shingles to be dropped and simultaneously rotated as they transition from one star wheel catcher to another. This innovative mechanism ensures that the thicker edges of the shingles are oriented correctly, facilitating efficient production.
Career Highlights
Throughout his career, Douglas D. Smith has worked with notable companies, including Johns Manville and Manville Corporation. His experience in these organizations has contributed to his expertise in developing innovative building materials and processes.
Collaborations
Some of his coworkers include Richard N. Cunningham and Romain E. Loeffler, who have also made significant contributions to the field.
Conclusion
Douglas D. Smith's inventive spirit and dedication to innovation have led to advancements in building materials and shingle production. His patents reflect a blend of practicality and creativity, making a lasting impact in the industry.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile