Active polymer modification of bitumen for use in roofing materials
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United States of America Patent
Stats
-
Feb 2, 2021
Grant Date -
Aug 27, 2015
app pub date -
Feb 18, 2015
filing date -
Feb 26, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A modified bitumen consisting of a polyurethane wherein the polyisocyanate or polyisocyanate-dominated polyurethane prepolymer (or prepolymers) is first reacted with the bitumen to take advantage of the bitumen's hydroxyl and amine functionality and form an isocyanate-bitumen adduct to form a weatherproofing product.
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International Classification(s)
- 2015 Application Filing Year
- C08G Class
- 2777 Applications Filed
- 2224 Patents Issued To-Date
- 80.09 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C08G Class
- 69.43 % this patent is cited more than
- 4 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 2, 2028 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 2, 2032 |
