Vinylaromatic and olefin pseudoblock polymers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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May 29, 2001
Grant Date -
N/A
app pub date -
Aug 21, 1999
filing date -
Aug 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There are a number of recent developments relating to co- and homo-polymers of vinyl aromatic monomers. There are syndiotactic polymers of styrene, there are pseudo random polymers of styrene and ethylene. The present invention seeks to provide novel pseudoblock polymers of styrene and ethylene in which at least 10 weight % of the vinyl aromatic monomer is incorporated in the form of one or more atactic pseudoblocks.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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NOVA CHEMICLS CORPORATION | 645 - 7 AVENUE SW CALGARY ALBERTA T2P 4 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Lam, Patrick | Calgary, CA | 44 | 358 |
# of filed Patents : 44 Total Citations : 358 | |||
Wang, Qinyan | Calgary, CA | 62 | 356 |
# of filed Patents : 62 Total Citations : 356 |
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Patent Citation Ranking
- 2 Citation Count
- C08F Class
- 4.30 % this patent is cited more than
- 24 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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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 |
Full Text

Legal Events
Date | Code | Event | Description |
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Jul 01, 2019 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
Jul 01, 2019 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
May 26, 2019 | FP | EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: May 26, 2019 |
Jan 14, 2019 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
May 26, 2015 | I | Issuance | |
May 06, 2015 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Dec 20, 2012 | P | Published | |
Jun 15, 2012 | F | Filing |

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