DE3413362A1 - Zigarettenfilter und ihre herstellung - Google Patents

Zigarettenfilter und ihre herstellung

Info

Publication number
DE3413362A1
DE3413362A1 DE19843413362 DE3413362A DE3413362A1 DE 3413362 A1 DE3413362 A1 DE 3413362A1 DE 19843413362 DE19843413362 DE 19843413362 DE 3413362 A DE3413362 A DE 3413362A DE 3413362 A1 DE3413362 A1 DE 3413362A1
Authority
DE
Germany
Prior art keywords
fiber
fiber bundle
individual
fibers
components
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19843413362
Other languages
German (de)
English (en)
Other versions
DE3413362C2 (instruction
Inventor
Ján Dipl.-Ing. Šimo
Rudolf Dipl.-Ing. Svit Šimo
Štefan Dipl.-Ing. Poprad Baculák
Ján Poprad Badura
Viliam Dipl.-Ing. Beseda
Alexander Dipl.-Ing. Gregor
Jozef Dipl.-Ing. Batizovce Hudák
Ján Dipl.-Ing. Preßburg/Bratislava Kliský
Lumír Dipl.-Ing. Svit Knotek
František Dipl.-Ing. Mihály
Ivan Dipl.-Ing. Poprad Mitterpach
Jozef Dipl.-Ing. Nitra Peciar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VYZK USTAV CHEM VLAKEN
Original Assignee
VYZK USTAV CHEM VLAKEN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VYZK USTAV CHEM VLAKEN filed Critical VYZK USTAV CHEM VLAKEN
Publication of DE3413362A1 publication Critical patent/DE3413362A1/de
Application granted granted Critical
Publication of DE3413362C2 publication Critical patent/DE3413362C2/de
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/705—Books, albums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/731—Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/7414—Smokers'' requisites, e.g. pipe cleaners
    • B29L2031/7416—Smokers'' requisites, e.g. pipe cleaners for cigars or cigarettes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]
    • Y10T428/2924—Composite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2975—Tubular or cellular
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2978—Surface characteristic

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Nonwoven Fabrics (AREA)
  • Multicomponent Fibers (AREA)
  • Filtering Materials (AREA)
DE19843413362 1983-06-09 1984-04-09 Zigarettenfilter und ihre herstellung Granted DE3413362A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS834146A CS237872B1 (en) 1983-06-09 1983-06-09 Cigarette filtration stick filling and method of this filling making

Publications (2)

Publication Number Publication Date
DE3413362A1 true DE3413362A1 (de) 1984-12-13
DE3413362C2 DE3413362C2 (instruction) 1989-03-02

Family

ID=5383534

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843413362 Granted DE3413362A1 (de) 1983-06-09 1984-04-09 Zigarettenfilter und ihre herstellung

Country Status (20)

Country Link
US (1) US4546040A (instruction)
JP (1) JPS59227288A (instruction)
AT (1) AT385878B (instruction)
BE (1) BE899537A (instruction)
BG (1) BG49405A1 (instruction)
CA (1) CA1208098A (instruction)
CH (1) CH667572A5 (instruction)
CS (1) CS237872B1 (instruction)
DD (1) DD252944A3 (instruction)
DE (1) DE3413362A1 (instruction)
ES (1) ES532315A0 (instruction)
FR (1) FR2547171B1 (instruction)
GB (1) GB2145917B (instruction)
GR (1) GR79903B (instruction)
HU (1) HU195097B (instruction)
IN (1) IN161935B (instruction)
IT (1) IT1176053B (instruction)
LU (1) LU85347A1 (instruction)
PL (1) PL139316B2 (instruction)
YU (1) YU43363B (instruction)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5617882A (en) * 1992-10-08 1997-04-08 Nauchno-Proizvodstvennoe Obiedinenie "Kompozit" Tobacco smoking article filter with basalt fibers

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1189495B (it) * 1986-05-09 1988-02-04 S P T Srl Fibre sintetice a voluminosita' aumentata,procedimento per produrle e loro uso in particolare per filtri
US4961415A (en) * 1987-01-16 1990-10-09 Kimberly-Clark Corporation Controlled draft and efficiency filter element for smoking articles
US4903714A (en) * 1987-08-25 1990-02-27 R. J. Reynolds Tobacco Company Smoking article with improved mouthend piece
ES2047501T3 (es) * 1988-03-01 1994-03-01 Kimberly Clark Co Elemento filtrante de aspiracion y eficiencia controladas para articulos de fumar.
JP2828455B2 (ja) * 1989-03-31 1998-11-25 チッソ株式会社 たばこフィルター素材
US5076295A (en) * 1989-09-29 1991-12-31 R. J. Reynolds Tobacco Company Cigarette filter
US5105834A (en) * 1989-12-18 1992-04-21 R.J. Reynolds Tobacco Company Cigarette and cigarette filter element therefor
US5053066A (en) * 1990-05-04 1991-10-01 Hassenboehler Charles B Nonwoven filter and method of manufacture
US5269329A (en) * 1990-07-09 1993-12-14 Kimberly-Clark Corporation Method of producing tobacco flavored cigarette filter
US5246017A (en) * 1990-11-06 1993-09-21 R. J. Reynolds Tobacco Company Cigarette and cigarette filter element therefor
US5382400A (en) 1992-08-21 1995-01-17 Kimberly-Clark Corporation Nonwoven multicomponent polymeric fabric and method for making same
US5336552A (en) * 1992-08-26 1994-08-09 Kimberly-Clark Corporation Nonwoven fabric made with multicomponent polymeric strands including a blend of polyolefin and ethylene alkyl acrylate copolymer
US5405682A (en) 1992-08-26 1995-04-11 Kimberly Clark Corporation Nonwoven fabric made with multicomponent polymeric strands including a blend of polyolefin and elastomeric thermoplastic material
CA2092604A1 (en) * 1992-11-12 1994-05-13 Richard Swee-Chye Yeo Hydrophilic, multicomponent polymeric strands and nonwoven fabrics made therewith
US5482772A (en) 1992-12-28 1996-01-09 Kimberly-Clark Corporation Polymeric strands including a propylene polymer composition and nonwoven fabric and articles made therewith
GB9300901D0 (en) * 1993-01-19 1993-03-10 Rothmans Int Tobacco Tobacco smoke filters
US5538019A (en) * 1993-11-03 1996-07-23 Schweitzer-Mauduit International, Inc. Spunbond cigarette filter
US6169045B1 (en) 1993-11-16 2001-01-02 Kimberly-Clark Worldwide, Inc. Nonwoven filter media
US5509430A (en) * 1993-12-14 1996-04-23 American Filtrona Corporation Bicomponent fibers and tobacco smoke filters formed therefrom
US9834864B2 (en) * 2013-02-26 2017-12-05 Mitsubishi Chemical Corporation Process for producing a fibrous bundle via a spinning nozzle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2319735A1 (de) * 1972-04-20 1973-10-25 British Ropes Ltd Filtermaterial
DE2341686A1 (de) * 1972-08-17 1974-03-07 Daicel Ltd Verfahren zur herstellung eines zigarettenfilters aus celluloseacetatfasern
DE2558004B2 (de) * 1975-10-30 1978-04-06 Liggett & Myers Inc., Durham, N.C. (V.St.A.) Celluloseacetatfäden enthaltende Zigarettenfilter, Verfahren und Vorrichtung zu deren Herstellung
DE2916062A1 (de) * 1978-04-22 1979-10-31 Daicel Ltd Zigarettenfilter
DE3035039A1 (de) * 1980-09-17 1982-05-06 Fa. Carl Freudenberg, 6940 Weinheim Filterpackung

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB770071A (en) * 1955-02-09 1957-03-13 Nat Res Dev Improvements in tobacco smoke filters
US3144025A (en) * 1960-04-25 1964-08-11 Reeves Bros Inc Tobacco smoke filters
US3329544A (en) * 1961-05-11 1967-07-04 Cigarette Components Ltd Method of producing filter cores
GB941082A (en) * 1961-05-11 1963-11-06 Cigarette Components Ltd Improvements in or relating to cigarette filters
BE624460A (instruction) * 1961-11-24 1900-01-01
US3232294A (en) * 1962-03-05 1966-02-01 Nat Lead Co Tobacco smoke filter
US3536802A (en) * 1965-08-02 1970-10-27 Kanebo Ltd Method for spinning composite filaments
US3677881A (en) * 1967-05-15 1972-07-18 Chemcell Ltd Open celled polypropylene filament of improved uniformity
US3505164A (en) * 1967-06-23 1970-04-07 Hercules Inc Self-bulking conjugate filaments
US3769148A (en) * 1970-10-12 1973-10-30 Ici Ltd Fibrous sheet materials and filter elements formed therefrom
US3957936A (en) * 1971-07-22 1976-05-18 Raduner & Co., Ag High temperature process for modifying thermoplastic filamentous material
JPS5215627A (en) * 1975-07-09 1977-02-05 Mitsubishi Rayon Co Ltd Porous polypropylene hollow fibers and a process for manufacturing the m
US4173504A (en) * 1977-01-19 1979-11-06 Chisso Corporation Method for producing tobacco filters
JPS53145999A (en) * 1977-05-25 1978-12-19 Japan Tobacco Inc Preparation of cigarette filter
US4405688A (en) * 1982-02-18 1983-09-20 Celanese Corporation Microporous hollow fiber and process and apparatus for preparing such fiber
JPS5943118A (ja) * 1982-08-31 1984-03-10 Chisso Corp ポリオレフイン発泡繊維およびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2319735A1 (de) * 1972-04-20 1973-10-25 British Ropes Ltd Filtermaterial
DE2341686A1 (de) * 1972-08-17 1974-03-07 Daicel Ltd Verfahren zur herstellung eines zigarettenfilters aus celluloseacetatfasern
DE2558004B2 (de) * 1975-10-30 1978-04-06 Liggett & Myers Inc., Durham, N.C. (V.St.A.) Celluloseacetatfäden enthaltende Zigarettenfilter, Verfahren und Vorrichtung zu deren Herstellung
DE2916062A1 (de) * 1978-04-22 1979-10-31 Daicel Ltd Zigarettenfilter
DE3035039A1 (de) * 1980-09-17 1982-05-06 Fa. Carl Freudenberg, 6940 Weinheim Filterpackung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5617882A (en) * 1992-10-08 1997-04-08 Nauchno-Proizvodstvennoe Obiedinenie "Kompozit" Tobacco smoking article filter with basalt fibers

Also Published As

Publication number Publication date
YU99384A (en) 1986-12-31
CA1208098A (en) 1986-07-22
PL139316B2 (en) 1987-01-31
YU43363B (en) 1989-06-30
US4546040A (en) 1985-10-08
ATA109284A (de) 1987-11-15
ES8506432A1 (es) 1985-08-01
IN161935B (instruction) 1988-02-27
PL247770A2 (en) 1985-03-26
CS237872B1 (en) 1985-11-13
BE899537A (fr) 1984-08-16
CH667572A5 (de) 1988-10-31
HUT34333A (en) 1985-03-28
LU85347A1 (fr) 1984-11-19
ES532315A0 (es) 1985-08-01
IT8420543A1 (it) 1985-10-13
JPS59227288A (ja) 1984-12-20
GR79903B (instruction) 1984-10-31
IT8420543A0 (it) 1984-04-13
HU195097B (en) 1988-04-28
AT385878B (de) 1988-05-25
DE3413362C2 (instruction) 1989-03-02
BG49405A1 (en) 1991-11-15
DD252944A3 (de) 1988-01-06
GB2145917A (en) 1985-04-11
IT1176053B (it) 1987-08-12
FR2547171A1 (fr) 1984-12-14
GB2145917B (en) 1987-12-02
FR2547171B1 (fr) 1990-07-20

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Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee