GB1373788A - Sizing method and composition for use therein - Google Patents
Sizing method and composition for use thereinInfo
- Publication number
- GB1373788A GB1373788A GB4885671A GB4885671A GB1373788A GB 1373788 A GB1373788 A GB 1373788A GB 4885671 A GB4885671 A GB 4885671A GB 4885671 A GB4885671 A GB 4885671A GB 1373788 A GB1373788 A GB 1373788A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ketene dimer
- emulsifier
- dicyandiamide
- condensate
- composition
- 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.)
- Expired
Links
- 239000000203 mixture Substances 0.000 title abstract 4
- 238000004513 sizing Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title 1
- WASQWSOJHCZDFK-UHFFFAOYSA-N diketene Chemical compound C=C1CC(=O)O1 WASQWSOJHCZDFK-UHFFFAOYSA-N 0.000 abstract 3
- 239000003995 emulsifying agent Substances 0.000 abstract 3
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 abstract 2
- 239000000839 emulsion Substances 0.000 abstract 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Substances O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 abstract 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 abstract 1
- 239000004952 Polyamide Substances 0.000 abstract 1
- 229920002472 Starch Polymers 0.000 abstract 1
- 235000011037 adipic acid Nutrition 0.000 abstract 1
- 239000001361 adipic acid Substances 0.000 abstract 1
- 125000002091 cationic group Chemical group 0.000 abstract 1
- 150000001991 dicarboxylic acids Chemical class 0.000 abstract 1
- -1 dimethylaminoethyl Chemical group 0.000 abstract 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 abstract 1
- SZPHJWIVTRIHBG-UHFFFAOYSA-N octadec-1-en-1-one Chemical class CCCCCCCCCCCCCCCCC=C=O SZPHJWIVTRIHBG-UHFFFAOYSA-N 0.000 abstract 1
- 229920001281 polyalkylene Polymers 0.000 abstract 1
- 229920002647 polyamide Polymers 0.000 abstract 1
- 229920000768 polyamine Polymers 0.000 abstract 1
- 229920001592 potato starch Polymers 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000011122 softwood Substances 0.000 abstract 1
- 235000019698 starch Nutrition 0.000 abstract 1
- 239000008107 starch Substances 0.000 abstract 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09J161/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/17—Ketenes, e.g. ketene dimers
-
- 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
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
- D21H17/50—Acyclic compounds
-
- 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
- D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4885671A GB1373788A (en) | 1971-10-20 | 1971-10-20 | Sizing method and composition for use therein |
| ZA726644A ZA726644B (en) | 1971-10-20 | 1972-09-28 | Sizing method and composition for use therein |
| AU47302/72A AU475312B2 (en) | 1971-10-20 | 1972-10-03 | Sizing method and composition for use therein |
| FI2763/72A FI60025B (fi) | 1971-10-20 | 1972-10-06 | Foerfarande foer framstaellning av med ketendimer limmat papper och kartong |
| CA153,727A CA1010612A (en) | 1971-10-20 | 1972-10-12 | Sizing method and composition for use therein |
| NLAANVRAGE7214014,A NL172087B (nl) | 1971-10-20 | 1972-10-17 | Werkwijze voor de vervaardiging van gelijmd papier of karton en werkwijze voor de bereiding van een lijmsamenstelling. |
| FR7236699A FR2156750B1 (en:Method) | 1971-10-20 | 1972-10-17 | |
| DE2250995A DE2250995B2 (de) | 1971-10-20 | 1972-10-18 | Verfahren zur Herstellung von geleimten Papier, Karton oder geleimter Pappe aus Zellstoff und in diesem Verfahren anwendbares Leimstoffgemisch |
| IT70283/72A IT975293B (it) | 1971-10-20 | 1972-10-19 | Composizione e procedimento per l incollatura della carta |
| NO723771A NO141018B (no) | 1971-10-20 | 1972-10-19 | Fremgangsmaate ved fremstilling av et limet papirprodukt fra celluloseholdig papirmasse, samt limblanding for anvendelse ved utoevelse av fremgangsmaaten |
| SE7213479A SE399080B (sv) | 1971-10-20 | 1972-10-19 | Limningsforfarande och limningskomposition for anvendning vid forfarandet innehallande ett ketendimerlimningsmedel och ett dicyandiamidformaldehydkondensat |
| US05/538,676 US3957574A (en) | 1971-10-20 | 1975-01-06 | Sizing method and composition for use therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4885671A GB1373788A (en) | 1971-10-20 | 1971-10-20 | Sizing method and composition for use therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1373788A true GB1373788A (en) | 1974-11-13 |
Family
ID=10450176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4885671A Expired GB1373788A (en) | 1971-10-20 | 1971-10-20 | Sizing method and composition for use therein |
Country Status (11)
| Country | Link |
|---|---|
| AU (1) | AU475312B2 (en:Method) |
| CA (1) | CA1010612A (en:Method) |
| DE (1) | DE2250995B2 (en:Method) |
| FI (1) | FI60025B (en:Method) |
| FR (1) | FR2156750B1 (en:Method) |
| GB (1) | GB1373788A (en:Method) |
| IT (1) | IT975293B (en:Method) |
| NL (1) | NL172087B (en:Method) |
| NO (1) | NO141018B (en:Method) |
| SE (1) | SE399080B (en:Method) |
| ZA (1) | ZA726644B (en:Method) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243481A (en) * | 1977-08-19 | 1981-01-06 | Hercules Incorporated | Sizing compositions |
| US4317756A (en) | 1977-08-19 | 1982-03-02 | Hercules Incorporated | Sizing composition comprising a hydrophobic cellulose-reactive sizing agent and a cationic polymer |
| US4784727A (en) * | 1982-01-30 | 1988-11-15 | Bayer Aktiengesellschaft | Sizing agent and use thereof |
| US5026457A (en) * | 1985-01-08 | 1991-06-25 | Skw Trostberg Aktiengesellschaft | Process for sizing in the production of paper, cardboard, paperboard and other cellulose containing materials |
| US6051107A (en) * | 1997-04-28 | 2000-04-18 | Hercules Incorporated | Process for surface sizing paper and paper prepared thereby |
| US6359040B1 (en) | 1998-05-12 | 2002-03-19 | Hercules Incorporated | Aqueous systems comprising an ionic polymer and a viscosity promoter, processes for their preparation, and uses thereof |
| US7279071B2 (en) | 2001-04-11 | 2007-10-09 | International Paper Company | Paper articles exhibiting water resistance and method for making same |
| US7482046B2 (en) | 2000-01-26 | 2009-01-27 | International Paper Company | Cut resistant paper and paper articles and method for making same |
| EP2028015A1 (en) | 2005-10-14 | 2009-02-25 | International Paper Company | Recording sheet with improved image dry time |
| US7622022B2 (en) | 2006-06-01 | 2009-11-24 | Benny J Skaggs | Surface treatment of substrate or paper/paperboard products using optical brightening agent |
| US7682438B2 (en) | 2005-11-01 | 2010-03-23 | International Paper Company | Paper substrate having enhanced print density |
| WO2011016972A1 (en) | 2009-08-07 | 2011-02-10 | International Paper Company | System, method and software for reducing printer colorant usage |
| US8057637B2 (en) | 2007-12-26 | 2011-11-15 | International Paper Company | Paper substrate containing a wetting agent and having improved print mottle |
| US8263186B2 (en) | 2001-04-11 | 2012-09-11 | International Paper Company | Paper articles exhibiting long term storageability and method for making same |
| EP2511419A1 (en) | 2005-11-01 | 2012-10-17 | International Paper Company | A paper substrate having enhanced print density |
| US8377526B2 (en) | 2005-03-11 | 2013-02-19 | International Paper Company | Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same |
| US8382945B2 (en) | 2008-08-28 | 2013-02-26 | International Paper Company | Expandable microspheres and methods of making and using the same |
| US8460511B2 (en) | 2008-10-01 | 2013-06-11 | International Paper Company | Paper substrate containing a wetting agent and having improved printability |
| US8460512B2 (en) | 2002-09-13 | 2013-06-11 | International Paper Company | Paper with improved stiffness and bulk and method for making same |
| US8574690B2 (en) | 2009-12-17 | 2013-11-05 | International Paper Company | Printable substrates with improved dry time and acceptable print density by using monovalent salts |
| US8613829B2 (en) | 2009-06-16 | 2013-12-24 | International Paper Company | Anti-microbial paper substrates useful in wallboard tape applications |
| US8652593B2 (en) | 2009-12-17 | 2014-02-18 | International Paper Company | Printable substrates with improved brightness from OBAs in presence of multivalent metal salts |
| US10036124B2 (en) | 2012-01-23 | 2018-07-31 | International Paper Company | Separated treatment of paper substrate with multivalent metal salts and OBAs |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4240935A (en) * | 1978-12-22 | 1980-12-23 | Hercules Incorporated | Ketene dimer paper sizing compositions |
| EP0037379A1 (de) * | 1980-03-28 | 1981-10-07 | Ciba-Geigy Ag | Umsetzungsproduktsalze aus Epoxyden, Polyalkylenpolyaminoamiden, Fettaminen und Fettsäuren, Fettsäureestern, -halogeniden, -iso-cyanaten oder -ketendimeren, deren Herstellung und Verwendung als Papierleimungsmittel |
| DE3319569A1 (de) * | 1982-06-09 | 1983-12-15 | Sandoz-Patent-GmbH, 7850 Lörrach | Verfahren zur herstellung von optisch aufgehellten papieren |
| DE3316179A1 (de) * | 1983-05-04 | 1984-11-08 | Basf Ag, 6700 Ludwigshafen | Verfahren zur masseleimung von papier |
| RU2164573C1 (ru) * | 2000-06-28 | 2001-03-27 | Гурьянов Владимир Евсеевич | Водно-дисперсионный состав для проклейки волокнистых материалов |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3046186A (en) * | 1957-06-12 | 1962-07-24 | American Cyanamid Co | Cationic sizing emulsions and paper sized therewith |
| NL110447C (en:Method) * | 1957-09-05 | |||
| FR1218904A (fr) * | 1958-03-26 | 1960-05-13 | Basf Ag | Procédé pour le collage du papier |
| NL131880C (en:Method) * | 1958-12-24 | |||
| FR1312719A (fr) * | 1961-01-19 | 1962-12-21 | Miles Lab | Fibres cellulosiques ayant des propriétés améliorées |
-
1971
- 1971-10-20 GB GB4885671A patent/GB1373788A/en not_active Expired
-
1972
- 1972-09-28 ZA ZA726644A patent/ZA726644B/xx unknown
- 1972-10-03 AU AU47302/72A patent/AU475312B2/en not_active Expired
- 1972-10-06 FI FI2763/72A patent/FI60025B/fi active
- 1972-10-12 CA CA153,727A patent/CA1010612A/en not_active Expired
- 1972-10-17 NL NLAANVRAGE7214014,A patent/NL172087B/xx not_active Application Discontinuation
- 1972-10-17 FR FR7236699A patent/FR2156750B1/fr not_active Expired
- 1972-10-18 DE DE2250995A patent/DE2250995B2/de not_active Ceased
- 1972-10-19 NO NO723771A patent/NO141018B/no unknown
- 1972-10-19 IT IT70283/72A patent/IT975293B/it active
- 1972-10-19 SE SE7213479A patent/SE399080B/xx unknown
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243481A (en) * | 1977-08-19 | 1981-01-06 | Hercules Incorporated | Sizing compositions |
| US4317756A (en) | 1977-08-19 | 1982-03-02 | Hercules Incorporated | Sizing composition comprising a hydrophobic cellulose-reactive sizing agent and a cationic polymer |
| US4784727A (en) * | 1982-01-30 | 1988-11-15 | Bayer Aktiengesellschaft | Sizing agent and use thereof |
| US5026457A (en) * | 1985-01-08 | 1991-06-25 | Skw Trostberg Aktiengesellschaft | Process for sizing in the production of paper, cardboard, paperboard and other cellulose containing materials |
| US6051107A (en) * | 1997-04-28 | 2000-04-18 | Hercules Incorporated | Process for surface sizing paper and paper prepared thereby |
| US6359040B1 (en) | 1998-05-12 | 2002-03-19 | Hercules Incorporated | Aqueous systems comprising an ionic polymer and a viscosity promoter, processes for their preparation, and uses thereof |
| US7482046B2 (en) | 2000-01-26 | 2009-01-27 | International Paper Company | Cut resistant paper and paper articles and method for making same |
| US8317976B2 (en) | 2000-01-26 | 2012-11-27 | International Paper Company | Cut resistant paper and paper articles and method for making same |
| US7790251B2 (en) | 2000-01-26 | 2010-09-07 | International Paper Company | Cut resistant paper and paper articles and method for making same |
| US7279071B2 (en) | 2001-04-11 | 2007-10-09 | International Paper Company | Paper articles exhibiting water resistance and method for making same |
| US8263186B2 (en) | 2001-04-11 | 2012-09-11 | International Paper Company | Paper articles exhibiting long term storageability and method for making same |
| US7666272B2 (en) | 2001-04-11 | 2010-02-23 | International Paper Company | Paper articles exhibiting water resistance and method for making same |
| US7666273B2 (en) | 2001-04-11 | 2010-02-23 | International Paper Company | Paper articles exhibiting water resistance and method for making same |
| US7927458B2 (en) | 2001-04-11 | 2011-04-19 | International Paper Company | Paper articles exhibiting water resistance and method for making same |
| US8790494B2 (en) | 2002-09-13 | 2014-07-29 | International Paper Company | Paper with improved stiffness and bulk and method for making same |
| US8460512B2 (en) | 2002-09-13 | 2013-06-11 | International Paper Company | Paper with improved stiffness and bulk and method for making same |
| US8377526B2 (en) | 2005-03-11 | 2013-02-19 | International Paper Company | Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same |
| EP2028015A1 (en) | 2005-10-14 | 2009-02-25 | International Paper Company | Recording sheet with improved image dry time |
| US8758886B2 (en) | 2005-10-14 | 2014-06-24 | International Paper Company | Recording sheet with improved image dry time |
| US8157961B2 (en) | 2005-11-01 | 2012-04-17 | International Paper Company | Paper substrate having enhanced print density |
| EP2511419A1 (en) | 2005-11-01 | 2012-10-17 | International Paper Company | A paper substrate having enhanced print density |
| US10036123B2 (en) | 2005-11-01 | 2018-07-31 | International Paper Company | Paper substrate having enhanced print density |
| US7682438B2 (en) | 2005-11-01 | 2010-03-23 | International Paper Company | Paper substrate having enhanced print density |
| US7972477B2 (en) | 2006-06-01 | 2011-07-05 | International Paper Company | Surface treatment of substrate or paper/paperboard products using optical brightening agent |
| US7622022B2 (en) | 2006-06-01 | 2009-11-24 | Benny J Skaggs | Surface treatment of substrate or paper/paperboard products using optical brightening agent |
| US8382947B2 (en) | 2006-06-01 | 2013-02-26 | International Paper Company | Surface treatment of substrate or paper/paperboard products using optical brightening agent |
| US8465622B2 (en) | 2007-12-26 | 2013-06-18 | International Paper Company | Paper substrate containing a wetting agent and having improved print mottle |
| US8057637B2 (en) | 2007-12-26 | 2011-11-15 | International Paper Company | Paper substrate containing a wetting agent and having improved print mottle |
| US8679294B2 (en) | 2008-08-28 | 2014-03-25 | International Paper Company | Expandable microspheres and methods of making and using the same |
| US8382945B2 (en) | 2008-08-28 | 2013-02-26 | International Paper Company | Expandable microspheres and methods of making and using the same |
| US8460511B2 (en) | 2008-10-01 | 2013-06-11 | International Paper Company | Paper substrate containing a wetting agent and having improved printability |
| US8613829B2 (en) | 2009-06-16 | 2013-12-24 | International Paper Company | Anti-microbial paper substrates useful in wallboard tape applications |
| WO2011016972A1 (en) | 2009-08-07 | 2011-02-10 | International Paper Company | System, method and software for reducing printer colorant usage |
| US8456705B2 (en) | 2009-08-07 | 2013-06-04 | International Paper Company | System, method and software for reducing printer colorant usage |
| US8854689B2 (en) | 2009-08-07 | 2014-10-07 | International Paper Company | System, method and software for reducing printer colorant usage |
| US8574690B2 (en) | 2009-12-17 | 2013-11-05 | International Paper Company | Printable substrates with improved dry time and acceptable print density by using monovalent salts |
| US8652593B2 (en) | 2009-12-17 | 2014-02-18 | International Paper Company | Printable substrates with improved brightness from OBAs in presence of multivalent metal salts |
| US10036124B2 (en) | 2012-01-23 | 2018-07-31 | International Paper Company | Separated treatment of paper substrate with multivalent metal salts and OBAs |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2250995B2 (de) | 1980-08-07 |
| NO141018B (no) | 1979-09-17 |
| CA1010612A (en) | 1977-05-24 |
| ZA726644B (en) | 1974-04-24 |
| IT975293B (it) | 1974-07-20 |
| AU475312B2 (en) | 1976-08-19 |
| FR2156750B1 (en:Method) | 1977-08-26 |
| NL7214014A (en:Method) | 1973-04-25 |
| FI60025B (fi) | 1981-07-31 |
| DE2250995A1 (de) | 1973-05-03 |
| NL172087B (nl) | 1983-02-01 |
| FR2156750A1 (en:Method) | 1973-06-01 |
| AU4730272A (en) | 1974-04-11 |
| SE399080B (sv) | 1978-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 429A | Application made for amendment of specification (sect. 29/1949) | ||
| 429H | Application (made) for amendment of specification now open to opposition (sect. 29/1949) | ||
| 429D | Case decided by the comptroller ** specification amended (sect. 29/1949) | ||
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |