Integrated process for urea and melamine production
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 19, 2017
Grant Date -
Jul 7, 2016
app pub date -
Mar 15, 2016
filing date -
Nov 4, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In an integrated process for urea and melamine production, urea is produced in a urea plant (10) comprising a high pressure urea synthesis section (11) from which an aqueous solution comprising urea, ammonium carbamate and ammonia is obtained and a urea recovery section (21) operating at low pressure, and melamine is produced in a melamine plant (40) wherein off-gases resulting as by-products of the melamine synthesis are discharged from said plant at a medium pressure and recycled to the high-pressure urea synthesis section (11).
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 | |
---|---|---|
CASALE SA | 6900 LUGANO-BESSO |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Brunengo, Paolo | Woking, GB | 10 | 27 |
# of filed Patents : 10 Total Citations : 27 | |||
Sticchi, Paolo | Massagno, CH | 6 | 24 |
# of filed Patents : 6 Total Citations : 24 | |||
Zardi, Federico | Breganzona, CH | 46 | 166 |
# of filed Patents : 46 Total Citations : 166 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 19, 2025 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 19, 2029 |
Fee | Large entity fee | small entity fee | micro entity fee |
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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 |
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Legal Events
Date | Code | Event | Description |
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Nov 10, 2021 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4 |
May 22, 2018 | I | Issuance | |
May 02, 2018 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
May 26, 2015 | AS | ASSIGNMENT | free format text: CHANGE OF NAME;ASSIGNOR:CITIZEN MACHINERY MIYANO CO., LTD.;REEL/FRAME:035798/0113 Owner name: CITIZEN MACHINERY CO., LTD., JAPAN Effective Date: May 26, 2015 |
Apr 17, 2014 | P | Published | |
Dec 10, 2013 | F | Filing | |
Nov 05, 2013 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HARIKI, RYO;KOBAYASHI, KOUICHI;IMASAKI, NOBUYOSHI;REEL/FRAME:031876/0554 Owner name: CITIZEN MACHINERY MIYANO CO., LTD., JAPAN Effective Date: Nov 05, 2013 |
Nov 10, 2011 | PD | Priority Date |

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