Method for controlling an oxygen bleaching
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 20, 1989
Issued Date -
N/A
app pub date -
Jun 28, 1988
filing date -
Nov 8, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for controlling an oxygen-bleaching process of lignocellulosic pulp to a desired degree of delignification. The pulp is passed at a substantially constant temperature into a bleaching reactor wherein the pulp has a substantially constant level at its outlet. The hydrostatic pressure is measured and the quantity of oxygen fed into the reactor is adjusted to reach a desired degree of delignification.
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 | |
---|---|---|
RAUMA-REPOLA OY | SNELLMANNINKATU 13 00170 HELSINKI |
International Classification(s)

- 1988 Application Filing Year
- D21C Class
- 63 Applications Filed
- 1 Patents Issued To-Date
- 1.59 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Malmsten, Erkki | Rauma, FI | 1 | 19 |
# of filed Patents : 1 Total Citations : 19 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 19 Citation Count
- D21C Class
- 0 % this patent is cited more than
- 36 Age
Forward Cite Landscape
- No Forward Cites to Display

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

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Mar 21, 2017 | I | Issuance | |
Mar 01, 2017 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Jan 21, 2016 | P | Published | |
Sep 19, 2014 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RUPPRECHTER, ALFRED;FUCHS, MICHAEL;LAMANNA, WILLIAM;AND OTHERS;REEL/FRAME:033828/0475 Owner name: SANDOZ GMBH, AUSTRIA Effective Date: Sep 19, 2014 |
Sep 17, 2014 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDOZ GMBH;REEL/FRAME:033836/0853 Owner name: SANDOZ AG, SWITZERLAND Effective Date: Sep 17, 2014 free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE EXECUTION DATES OF THE ASSIGNORS PREVIOUSLY RECORDED ON REEL 033828 FRAME 0475. ASSIGNOR(S) HEREBY CONFIRMS THE EXECUTION DATES OF THE ASSIGNORS;ASSIGNORS:RUPPRECHTER, ALFRED;FUCHS, MICHAEL;LAMANNA, WILLIAM;AND OTHERS;SIGNING DATES FROM 20140911 TO 20140912;REEL/FRAME:033836/0589 Owner name: SANDOZ GMBH, AUSTRIA |
Aug 08, 2014 | F | Filing | |
Jul 18, 2014 | PD | Priority Date |

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