US Patent No: 6,291,541
Number of patents in Portfolio can not be more than 2000
Solid vinyl ether terminated urethane curing agent
Stats
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Sep 18, 2001
Issued date -
Jun 25, 1999
filing date -
09/344,034
serial no -
Expired
status
Importance
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Abstract
Solid vinyl ether terminated curing agents for powder coatings can be prepared by reacting an aliphatic diisocyanate with a polyol and then with a hydroxy vinyl ether, or by reacting an aliphatic polyisocyanate with a hydroxy vinyl ether. Powder coatings based on the so prepared curing agents are extremely useful for coating heat sensitive substrates by exposure to ultraviolet light, heat, or both.
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First Claim
Related Publications
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International Classification(s)
Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,749,807 Vinyl ether terminated ester oligomers | 29 | 1987 | |
| 4,775,732 Vinyl ether terminated ester and urethane resins from bis(hydroxyalkyl)cycloalkanes | 23 | 1988 | |
| 5,139,872 Vinyl ether based optical fiber coatings | 30 | 1990 | |
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| 4,956,198 Ultraviolet-curable cationic vinyl ether polyurethane coating compositions | 14 | 1988 | |
| 4,996,282 Cationically curable polyurethane compositions having vinyl ether functionality | 15 | 1989 | |
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| 4,751,273 Vinyl ether terminated urethane resins | 33 | 1987 | |
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| 5,200,490 Polyurethane vinyl ethers | 6 | 1992 | |
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| 5,437,964 Stereolithography using vinyl ether-epoxide polymers | 34 | 1994 | |
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| 5,019,636 Polyester chain-extended vinyl ether urethane oligomers | 7 | 1989 | |
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| 5,922,473 Dual thermal and ultraviolet curable powder coatings | 27 | 1996 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 18, 2013 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| 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 |