US Patent No: 8,088,830
Number of patents in Portfolio can not be more than 2000
Paper production with modified silica gels as microparticles
Stats
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Jan 3, 2012
Issued date -
Jan 12, 2010
filing date -
12/685,947
serial no -
In Force
status
Importance
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Abstract
Use of silica sols containing sulfonic acid groups and/or mercapto groups as microparticles in paper production, in particular for paper retention.
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First Claim
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,368,833 Silica sols having high surface area | 66 | 1992 | |
| 5,643,414 Silica sols in papermaking | 19 | 1994 | |
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| 5,760,126 Aqueous fluorochemical compositions and abrasion-resistant coatings therefrom | 58 | 1996 | |
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| 2002/0011,191 Mixture of silica sols | 1 | 2001 | |
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| 5,603,805 Silica sols and use of the sols | 40 | 1995 | |
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| 5,888,290 Composition and process for imparting durable repellency to substrates | 21 | 1996 | |
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| 4,798,653 Retention and drainage aid for papermaking | 20 | 1988 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jul 3, 2015 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 3, 2019 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 3, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |