Gypsum wallboard and method of making same
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United States of America Patent
Stats
-
Dec 20, 2016
Grant Date -
Dec 1, 2011
app pub date -
Aug 11, 2011
filing date -
Jun 14, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A coalescing additive is used in the manufacturing process for gypsum wallboard. Such an additive increases the surface area and density of the slurry at the paper to core interface by coalescing the foam cells away from the paper core interface. This permits a stronger paper to core bond to form and increases the compressive strength of the gypsum wallboard as compared to standard wallboards made from slurries with reduced water levels.
First Claim
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International Classification(s)
- 2011 Application Filing Year
- B28B Class
- 339 Applications Filed
- 187 Patents Issued To-Date
- 55.17 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B28B Class
- 36.81 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 20, 2028 |
