Location History:
- Cheltenham, EN (1977)
- Cheltenham, GB (1980 - 1987)
Company Filing History:
Years Active: 1977-1987
Title: Innovations by Robert James Pragnell
Introduction
Robert James Pragnell is a notable inventor based in Cheltenham, GB. He has made significant contributions to the field of roofing technology, holding a total of 4 patents. His work focuses on creating efficient and effective methods for waterproofing roofs, which are essential in construction and building maintenance.
Latest Patents
One of Pragnell's latest patents is a method of forming a waterproof roof. This innovative roofing method involves applying a self-adhesive sheet that consists of an adhesive and waterproofing layer of bituminous compound. The sheet adheres to the roof deck over an area of 10-50% of the total sheet area, allowing water vapor to escape laterally. The upper surface of the sheet can be rendered adhesive, for example, by torching. Additionally, insulation board and a further self-adhesive sheet can be applied, followed by a final waterproofing sheet. This method completely avoids the use of hot bitumen, simplifying the formation of waterproof and insulated roofs while offering economic advantages.
Another significant patent by Pragnell is for a laminated insulating board. This board is made from a core of foamed phenol-formaldehyde resin, which has a closed cell content of at least 85%. It is laminated on at least one face using a water-based natural rubber latex adhesive with a glass fiber tissue or cloth. The laminate exhibits excellent fire resistance and can be bonded to roofs using hot bitumen.
Career Highlights
Pragnell's career has been marked by his dedication to innovation in roofing technology. His patents reflect a commitment to improving building materials and methods, making them more efficient and safer for use in various applications.
Collaborations
Throughout his career, Pragnell has collaborated with notable individuals in the industry, including Geoffrey Vincent Blunt and Newton John Hodges. These collaborations have likely contributed to the development and refinement of his innovative ideas.
Conclusion
Robert James Pragnell is a distinguished inventor whose work in roofing technology has led to significant advancements in waterproofing methods and insulating materials. His contributions continue to impact the construction industry positively.
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.