Process for the delignifcation and bleaching of a lignocellulose material
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 20, 1997
Grant Date -
N/A
app pub date -
Feb 23, 1995
filing date -
Jun 22, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is provided for delignifying and bleaching a lignocellulose material, wherein an aqueous solution of a redox catalyst and an oxidant is reacted with the material. The catalyst comprises an organometallic cation of the general formula [(1)Mno.sub.2 Mn(L)].sup.n+, wherein Mn is manganese (III) or (IV) oxide, the two Mn's of this cation may form a pair in a III-III, III-IV or IV-IV oxidative state, n is 2, 3 or 4, O is oxygen, and L is a ligand comprising 4 nitrogen atoms co-ordinating the manganese.
First Claim
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Family
Country | kind | publication No. | Filing Date | Type | Sub-Type |
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- ELF AQUITAINE PRODUCTION
International Classification(s)

- 1995 Application Filing Year
- D21C Class
- 135 Applications Filed
- 68 Patents Issued To-Date
- 50.38 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Boe, Jean-Francedillaois | Toulouse, FR | 1 | 41 |
# of filed Patents : 1 Total Citations : 41 | |||
Girerd, Jean-Jacques | Gif Sur Yvette, FR | 2 | 42 |
# of filed Patents : 2 Total Citations : 42 | |||
Guignard, Claude | Ossage, FR | 10 | 321 |
# of filed Patents : 10 Total Citations : 321 | |||
Seris, Jean-Louis | Jurancon, FR | 10 | 153 |
# of filed Patents : 10 Total Citations : 153 | |||
Verlhac, Jean-Baptiste | Talence, FR | 3 | 132 |
# of filed Patents : 3 Total Citations : 132 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 41 Citation Count
- D21C Class
- 97.96 % this patent is cited more than
- 28 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

Legal Events
Date | Code | Event | Description |
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Nov 23, 2020 | 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: MICROENTITY |
Nov 23, 2020 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Oct 18, 2020 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Oct 18, 2020 |
Jun 08, 2020 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: MICROENTITY |
Oct 18, 2016 | I | Issuance | |
Sep 28, 2016 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Aug 20, 2015 | P | Published | |
Feb 18, 2014 | F | Filing | |
Feb 18, 2014 | PD | Priority Date |

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