FI884339A - Förfarande för avvattning av papper - Google Patents
Förfarande för avvattning av papper Download PDFInfo
- Publication number
- FI884339A FI884339A FI884339A FI884339A FI884339A FI 884339 A FI884339 A FI 884339A FI 884339 A FI884339 A FI 884339A FI 884339 A FI884339 A FI 884339A FI 884339 A FI884339 A FI 884339A
- Authority
- FI
- Finland
- Prior art keywords
- procedure
- dewatering paper
- dewatering
- paper
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/76—Processes or apparatus for adding material to the pulp or to the paper characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
- D21H23/765—Addition of all compounds to the pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/099,585 US4795531A (en) | 1987-09-22 | 1987-09-22 | Method for dewatering paper |
Publications (3)
Publication Number | Publication Date |
---|---|
FI884339A0 FI884339A0 (sv) | 1988-09-21 |
FI884339A true FI884339A (sv) | 1989-03-23 |
FI96337B FI96337B (sv) | 1996-02-29 |
Family
ID=22275714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI884339A FI96337B (sv) | 1987-09-22 | 1988-09-21 | Förfarande för avvattning av papper |
Country Status (11)
Country | Link |
---|---|
US (1) | US4795531A (sv) |
EP (1) | EP0308752B1 (sv) |
JP (1) | JP2922907B2 (sv) |
AU (1) | AU600216B2 (sv) |
BR (1) | BR8804878A (sv) |
CA (1) | CA1321046C (sv) |
DE (2) | DE308752T1 (sv) |
ES (1) | ES2010968T3 (sv) |
FI (1) | FI96337B (sv) |
NO (1) | NO175160C (sv) |
NZ (1) | NZ226240A (sv) |
Families Citing this family (80)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4684440A (en) * | 1985-12-09 | 1987-08-04 | Paper Chemistry Laboratory, Inc. | Method for manufacturing paper products |
SE8701252D0 (sv) * | 1987-03-03 | 1987-03-25 | Eka Nobel Ab | Sett vid framstellning av papper |
EP0335575B2 (en) * | 1988-03-28 | 2000-08-23 | Ciba Specialty Chemicals Water Treatments Limited | Production of paper and paper board |
SE467627B (sv) * | 1988-09-01 | 1992-08-17 | Eka Nobel Ab | Saett vid framstaellning av papper |
DE68906623T2 (de) * | 1988-09-16 | 1993-11-11 | Du Pont | Polysilikatmikrogele als Rückhaltungs-/Entwässerungshilfsmittel bei der Papierherstellung. |
US4954220A (en) * | 1988-09-16 | 1990-09-04 | E. I. Du Pont De Nemours And Company | Polysilicate microgels as retention/drainage aids in papermaking |
US5131982A (en) * | 1990-02-26 | 1992-07-21 | Nalco Chemical Company | Use of dadmac containing polymers for coated broke treatment |
FR2672315B1 (fr) * | 1991-01-31 | 1996-06-07 | Hoechst France | Nouveau procede de raffinage de la pate a papier. |
US5178770A (en) * | 1991-07-12 | 1993-01-12 | Nalco Canada Inc. | Method of treating bctmp/ctmp wastewater |
US5126014A (en) * | 1991-07-16 | 1992-06-30 | Nalco Chemical Company | Retention and drainage aid for alkaline fine papermaking process |
US5169497A (en) * | 1991-10-07 | 1992-12-08 | Nalco Chemical Company | Application of enzymes and flocculants for enhancing the freeness of paper making pulp |
GB9301451D0 (en) * | 1993-01-26 | 1993-03-17 | Allied Colloids Ltd | Production of filled paper |
DE4302293A1 (de) * | 1993-01-28 | 1994-08-04 | Degussa | Füllstoff enthaltendes Papier |
GB9313956D0 (en) * | 1993-07-06 | 1993-08-18 | Allied Colloids Ltd | Production of paper |
US5484834A (en) * | 1993-11-04 | 1996-01-16 | Nalco Canada Inc. | Liquid slurry of bentonite |
DE4436317C2 (de) * | 1994-10-11 | 1998-10-29 | Nalco Chemical Co | Verfahren zur Verbesserung der Retention von Mineral-Füllstoffen und Cellulosefasern auf einem Cellulose-Faserbogen |
US5810971A (en) * | 1995-05-17 | 1998-09-22 | Nalco Canada, Inc. | Liquid slurry of bentonite |
US6193844B1 (en) | 1995-06-07 | 2001-02-27 | Mclaughlin John R. | Method for making paper using microparticles |
US5968316A (en) * | 1995-06-07 | 1999-10-19 | Mclauglin; John R. | Method of making paper using microparticles |
SE9502522D0 (sv) * | 1995-07-07 | 1995-07-07 | Eka Nobel Ab | A process for the production of paper |
US5595630A (en) * | 1995-08-31 | 1997-01-21 | E. I. Du Pont De Nemours And Company | Process for the manufacture of paper |
US5620629A (en) * | 1995-09-28 | 1997-04-15 | Nalco Chemical Company | Colloidal silica/polyelectrolyte blends for natural water clarification |
US5840158A (en) * | 1995-09-28 | 1998-11-24 | Nalco Chemical Company | Colloidal silica/polyelectrolyte blends for pulp and paper applications |
GB9603909D0 (en) | 1996-02-23 | 1996-04-24 | Allied Colloids Ltd | Production of paper |
US6059930A (en) * | 1996-09-24 | 2000-05-09 | Nalco Chemical Company | Papermaking process utilizing hydrophilic dispersion polymers of dimethylaminoethyl acrylate methyl chloride quaternary and acrylamide as retention and drainage aids |
ES2290960T3 (es) * | 1996-09-24 | 2008-02-16 | Nalco Chemical Company | Polimeros de dispersion hidrofila para aplicaciones de papel. |
GB9624832D0 (en) * | 1996-11-28 | 1997-01-15 | Allied Colloids Ltd | Production of paper and paper board |
US6113741A (en) * | 1996-12-06 | 2000-09-05 | Eka Chemicals Ab | Process for the production of paper |
DE19654390A1 (de) * | 1996-12-27 | 1998-07-02 | Basf Ag | Verfahren zur Herstellung von Papier |
US5900116A (en) | 1997-05-19 | 1999-05-04 | Sortwell & Co. | Method of making paper |
NZ503602A (en) | 1997-09-30 | 2001-03-30 | Nalco Chemical Co | Synthetic amorphous borosilicates and their use in the production of paper |
CO5070714A1 (es) | 1998-03-06 | 2001-08-28 | Nalco Chemical Co | Proceso para la preparacion de silice coloidal estable |
US7306700B1 (en) * | 1998-04-27 | 2007-12-11 | Akzo Nobel Nv | Process for the production of paper |
US6083997A (en) * | 1998-07-28 | 2000-07-04 | Nalco Chemical Company | Preparation of anionic nanocomposites and their use as retention and drainage aids in papermaking |
US6168686B1 (en) | 1998-08-19 | 2001-01-02 | Betzdearborn, Inc. | Papermaking aid |
NZ504660A (en) * | 1998-09-22 | 2002-12-20 | Calgon Corp | Microparticle system comprising a HMW polymer flocculant and silica-acid colloid blend; used as a retention and drainage aid in papermaking |
US6719881B1 (en) * | 1998-09-22 | 2004-04-13 | Charles R. Hunter | Acid colloid in a microparticle system used in papermaking |
ID29633A (id) * | 1998-09-22 | 2001-09-06 | Calgon Corp | Koloid asam dalam sistem mikropartikel yang digunakan dalam pembuatan kertas |
KR20000048167A (ko) * | 1998-12-24 | 2000-07-25 | 미우라 유이찌, 쓰지 가오루 | 양이온성 수지 변성 실리카 분산액 및 그 제조 방법 |
US6331229B1 (en) * | 1999-09-08 | 2001-12-18 | Nalco Chemical Company | Method of increasing retention and drainage in papermaking using high molecular weight water-soluble anionic or monionic dispersion polymers |
TW550325B (en) | 1999-11-08 | 2003-09-01 | Ciba Spec Chem Water Treat Ltd | Manufacture of paper and paperboard |
TW483970B (en) | 1999-11-08 | 2002-04-21 | Ciba Spec Chem Water Treat Ltd | A process for making paper and paperboard |
TW527457B (en) | 1999-11-08 | 2003-04-11 | Ciba Spec Chem Water Treat Ltd | Manufacture of paper and paperboard |
TW524910B (en) | 1999-11-08 | 2003-03-21 | Ciba Spec Chem Water Treat Ltd | Manufacture of paper and paperboard |
US6315866B1 (en) * | 2000-02-29 | 2001-11-13 | Nalco Chemical Company | Method of increasing the dry strength of paper products using cationic dispersion polymers |
US6918995B2 (en) * | 2000-08-07 | 2005-07-19 | Akzo Nobel N.V. | Process for the production of paper |
US20020166648A1 (en) * | 2000-08-07 | 2002-11-14 | Sten Frolich | Process for manufacturing paper |
EP1319105A1 (en) | 2000-09-20 | 2003-06-18 | Akzo Nobel N.V. | A process for the production of paper |
MY140287A (en) | 2000-10-16 | 2009-12-31 | Ciba Spec Chem Water Treat Ltd | Manufacture of paper and paperboard |
CA2470803C (en) * | 2001-12-21 | 2009-05-26 | Akzo Nobel N.V. | Aqueous silica-containing composition and process for production of paper |
ZA200508659B (en) * | 2003-05-09 | 2007-03-28 | Akzo Nobel Nv | A process for the production of paper |
US20060000570A1 (en) * | 2004-07-02 | 2006-01-05 | Zhiqiang Song | Amphoteric cationic polymers for controlling deposition of pitch and stickies in papermaking |
US20060084771A1 (en) * | 2004-10-15 | 2006-04-20 | Wong Shing Jane B | Method of preparing modified diallyl-N,N-disubstituted ammonium halide polymers |
US7473334B2 (en) * | 2004-10-15 | 2009-01-06 | Nalco Company | Method of preparing modified diallyl-N,N-disubstituted ammonium halide polymers |
FR2879631B1 (fr) * | 2004-12-16 | 2007-02-23 | Snf Sas Soc Par Actions Simpli | Procede pour la fabrication de papier |
US7955473B2 (en) | 2004-12-22 | 2011-06-07 | Akzo Nobel N.V. | Process for the production of paper |
CA2592314C (en) * | 2004-12-22 | 2011-02-08 | Akzo Nobel N.V. | A process for the production of paper |
US20060254464A1 (en) | 2005-05-16 | 2006-11-16 | Akzo Nobel N.V. | Process for the production of paper |
US8273216B2 (en) * | 2005-12-30 | 2012-09-25 | Akzo Nobel N.V. | Process for the production of paper |
JP5140000B2 (ja) | 2005-12-30 | 2013-02-06 | アクゾ ノーベル ナムローゼ フェンノートシャップ | 紙の製造方法 |
US9017649B2 (en) * | 2006-03-27 | 2015-04-28 | Nalco Company | Method of stabilizing silica-containing anionic microparticles in hard water |
AR074183A1 (es) | 2008-10-29 | 2010-12-29 | Du Pont | Tratamiento de corrientes de residuos |
US20100311846A1 (en) * | 2009-06-08 | 2010-12-09 | Matthew Bendiner | Methods for controlling water amount in a polymer composition or substrate |
WO2012018514A2 (en) | 2010-07-26 | 2012-02-09 | Sortwell & Co. | Method for dispersing and aggregating components of mineral slurries and high-molecular weight multivalent polymers for clay aggregation |
FI122548B (sv) | 2010-09-17 | 2012-03-15 | Upm Kymmene Corp | Förfarande för att förbättra avvattning |
US8721896B2 (en) | 2012-01-25 | 2014-05-13 | Sortwell & Co. | Method for dispersing and aggregating components of mineral slurries and low molecular weight multivalent polymers for mineral aggregation |
BR112014020640B1 (pt) * | 2012-03-01 | 2021-05-25 | Basf Se | processo de fabricação de papel, papelão ou papel-cartão |
CA2835677C (en) | 2012-12-19 | 2017-01-17 | E. I. Du Pont De Nemours And Company | Improved bitumen extraction process |
US10329169B2 (en) | 2013-02-14 | 2019-06-25 | Baker Hughes, A Ge Company, Llc | Colloidal silica addition to promote the separation of oil from water |
US9856159B2 (en) | 2013-04-12 | 2018-01-02 | Psmg, Llc | Polymer blends for flocculation |
WO2014176188A1 (en) | 2013-04-23 | 2014-10-30 | E. I. Du Pont De Nemours And Company | Process for treating and recycling hydraulic fracturing fluid |
US9714342B2 (en) | 2013-08-22 | 2017-07-25 | Psmg, Llc | Particle suspensions of flocculating polymer powders |
US10011717B2 (en) | 2013-11-27 | 2018-07-03 | Psmg, Llc | Particle suspensions of flocculating polymer powders and powder flocculant polymer blends |
CN108130801B (zh) | 2013-12-18 | 2020-11-24 | 艺康美国股份有限公司 | 生产用于造纸的活化胶态二氧化硅的方法 |
WO2017147392A1 (en) | 2016-02-26 | 2017-08-31 | Ecolab Usa Inc. | Drainage management in multi-ply papermaking |
KR102385314B1 (ko) | 2016-06-10 | 2022-04-11 | 에코랍 유에스에이 인코퍼레이티드 | 제지용 건조 증강제로 사용하기 위한 저분자량 건조 분말 중합체 |
US10703452B2 (en) * | 2016-10-17 | 2020-07-07 | General Electric Company | Apparatus and system for propeller blade aft retention |
US10486785B2 (en) * | 2016-10-17 | 2019-11-26 | General Electric Company | Propeller assembly and method of assembling |
JP7299872B2 (ja) | 2017-07-31 | 2023-06-28 | エコラブ ユーエスエイ インク | 乾燥ポリマー適用方法 |
EP3724265A1 (en) | 2017-12-13 | 2020-10-21 | Ecolab USA Inc. | Solution comprising an associative polymer and a cyclodextrin polymer |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3021257A (en) * | 1958-07-31 | 1962-02-13 | American Cyanamid Co | Paper containing pigment or filler |
FI150074A (sv) * | 1973-06-04 | 1974-12-05 | Calgon Corp | |
SE443818B (sv) * | 1978-04-24 | 1986-03-10 | Mitsubishi Chem Ind | Forfarande for framstellning av papper med forbettrad torrstyrka |
JPS5512868A (en) * | 1978-07-12 | 1980-01-29 | Mitsubishi Paper Mills Ltd | Production of neutral paper |
US4385961A (en) * | 1981-02-26 | 1983-05-31 | Eka Aktiebolag | Papermaking |
SE432951B (sv) * | 1980-05-28 | 1984-04-30 | Eka Ab | Pappersprodukt innehallande cellulosafibrer och ett bindemedelssystem som omfattar kolloidal kiselsyra och katjonisk sterkelse samt forfarande for framstellning av pappersprodukten |
JPH0314957B2 (sv) * | 1980-09-19 | 1991-02-27 | Sunden Olof | |
US4445970A (en) * | 1980-10-22 | 1984-05-01 | Penntech Papers, Inc. | High mineral composite fine paper |
SE451739B (sv) * | 1985-04-03 | 1987-10-26 | Eka Nobel Ab | Papperstillverkningsforfarande och pappersprodukt varvid som avvattnings- och retentionsforbettrande kemikalie anvends katjonisk polyakrylamid och en speciell oorganisk kolloid |
JPH0663197B2 (ja) * | 1985-11-07 | 1994-08-17 | 三菱製紙株式会社 | 中性紙の製紙方法 |
US4643801A (en) * | 1986-02-24 | 1987-02-17 | Nalco Chemical Company | Papermaking aid |
US4750974A (en) * | 1986-02-24 | 1988-06-14 | Nalco Chemical Company | Papermaking aid |
SE8701252D0 (sv) * | 1987-03-03 | 1987-03-25 | Eka Nobel Ab | Sett vid framstellning av papper |
SE467627B (sv) * | 1988-09-01 | 1992-08-17 | Eka Nobel Ab | Saett vid framstaellning av papper |
-
1987
- 1987-09-22 US US07/099,585 patent/US4795531A/en not_active Expired - Lifetime
-
1988
- 1988-09-09 EP EP88114801A patent/EP0308752B1/en not_active Revoked
- 1988-09-09 DE DE198888114801T patent/DE308752T1/de active Pending
- 1988-09-09 DE DE3886491T patent/DE3886491T2/de not_active Revoked
- 1988-09-09 ES ES88114801T patent/ES2010968T3/es not_active Expired - Lifetime
- 1988-09-15 CA CA000577489A patent/CA1321046C/en not_active Expired - Fee Related
- 1988-09-19 NZ NZ226240A patent/NZ226240A/xx unknown
- 1988-09-20 AU AU22436/88A patent/AU600216B2/en not_active Ceased
- 1988-09-21 FI FI884339A patent/FI96337B/sv not_active Application Discontinuation
- 1988-09-21 NO NO884187A patent/NO175160C/no not_active IP Right Cessation
- 1988-09-21 BR BR8804878A patent/BR8804878A/pt not_active IP Right Cessation
- 1988-09-21 JP JP63235100A patent/JP2922907B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FI884339A0 (sv) | 1988-09-21 |
EP0308752B1 (en) | 1993-12-22 |
ES2010968A4 (es) | 1989-12-16 |
AU600216B2 (en) | 1990-08-02 |
US4795531A (en) | 1989-01-03 |
CA1321046C (en) | 1993-08-10 |
NO884187L (no) | 1989-03-28 |
AU2243688A (en) | 1989-03-23 |
EP0308752A2 (en) | 1989-03-29 |
NO175160C (no) | 1994-09-07 |
BR8804878A (pt) | 1989-04-25 |
NO884187D0 (no) | 1988-09-21 |
ES2010968T3 (es) | 1994-02-16 |
EP0308752A3 (en) | 1989-08-09 |
DE3886491D1 (de) | 1994-02-03 |
NZ226240A (en) | 1989-10-27 |
DE3886491T2 (de) | 1994-07-07 |
JPH01162897A (ja) | 1989-06-27 |
FI96337B (sv) | 1996-02-29 |
JP2922907B2 (ja) | 1999-07-26 |
DE308752T1 (de) | 1989-12-28 |
NO175160B (no) | 1994-05-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application | ||
CD | Patent refused following opposition | ||
FC | Application refused |
Owner name: NALCO CHEMICAL COMPANY |