GB1560556A - Coated activated carbon beads for purifying blood - Google Patents
Coated activated carbon beads for purifying blood Download PDFInfo
- Publication number
- GB1560556A GB1560556A GB25833/76A GB2583376A GB1560556A GB 1560556 A GB1560556 A GB 1560556A GB 25833/76 A GB25833/76 A GB 25833/76A GB 2583376 A GB2583376 A GB 2583376A GB 1560556 A GB1560556 A GB 1560556A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coated
- activated carbon
- beads
- blood
- coating
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 150
- 239000011324 bead Substances 0.000 title claims description 41
- 210000004369 blood Anatomy 0.000 title claims description 32
- 239000008280 blood Substances 0.000 title claims description 32
- 229910052799 carbon Inorganic materials 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 46
- 238000000576 coating method Methods 0.000 claims description 33
- 239000011248 coating agent Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 32
- 238000001179 sorption measurement Methods 0.000 claims description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 16
- 244000060011 Cocos nucifera Species 0.000 claims description 16
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 claims description 14
- 229920001220 nitrocellulos Polymers 0.000 claims description 14
- 229940079938 nitrocellulose Drugs 0.000 claims description 14
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 13
- 102000009027 Albumins Human genes 0.000 claims description 13
- 108010088751 Albumins Proteins 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000011282 treatment Methods 0.000 claims description 11
- 238000000502 dialysis Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229920000193 polymethacrylate Polymers 0.000 claims description 6
- 230000037452 priming Effects 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 102000008186 Collagen Human genes 0.000 claims description 5
- 108010035532 Collagen Proteins 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000003575 carbonaceous material Substances 0.000 claims description 5
- 229920001436 collagen Polymers 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 210000003734 kidney Anatomy 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 239000013557 residual solvent Substances 0.000 claims description 5
- 210000001772 blood platelet Anatomy 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 238000005191 phase separation Methods 0.000 claims description 4
- 238000004108 freeze drying Methods 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 description 11
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 239000012503 blood component Substances 0.000 description 7
- 238000000746 purification Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000002504 physiological saline solution Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000003463 adsorbent Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000000306 component Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 208000001647 Renal Insufficiency Diseases 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- CVSVTCORWBXHQV-UHFFFAOYSA-N creatine Chemical compound NC(=[NH2+])N(C)CC([O-])=O CVSVTCORWBXHQV-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 201000006370 kidney failure Diseases 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000003053 toxin Substances 0.000 description 2
- 231100000765 toxin Toxicity 0.000 description 2
- LEHOTFFKMJEONL-UHFFFAOYSA-N Uric Acid Chemical compound N1C(=O)NC(=O)C2=C1NC(=O)N2 LEHOTFFKMJEONL-UHFFFAOYSA-N 0.000 description 1
- TVWHNULVHGKJHS-UHFFFAOYSA-N Uric acid Natural products N1C(=O)NC(=O)C2NC(=O)NC21 TVWHNULVHGKJHS-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 229960003624 creatine Drugs 0.000 description 1
- 239000006046 creatine Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- PSLIMVZEAPALCD-UHFFFAOYSA-N ethanol;ethoxyethane Chemical compound CCO.CCOCC PSLIMVZEAPALCD-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 210000002381 plasma Anatomy 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229940045136 urea Drugs 0.000 description 1
- 229940116269 uric acid Drugs 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
- B01J20/3268—Macromolecular compounds
- B01J20/3272—Polymers obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3679—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3204—Inorganic carriers, supports or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
- B01J20/3268—Macromolecular compounds
- B01J20/327—Polymers obtained by reactions involving only carbon to carbon unsaturated bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3289—Coatings involving more than one layer of same or different nature
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/372—Coating; Grafting; Microencapsulation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Carbon And Carbon Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50075640A JPS51151693A (en) | 1975-06-23 | 1975-06-23 | Coated bead-like activated carbon for blood purification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1560556A true GB1560556A (en) | 1980-02-06 |
Family
ID=13582037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25833/76A Expired GB1560556A (en) | 1975-06-23 | 1976-06-22 | Coated activated carbon beads for purifying blood |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS51151693A (enrdf_load_stackoverflow) |
| CA (1) | CA1057595A (enrdf_load_stackoverflow) |
| DE (1) | DE2627824C3 (enrdf_load_stackoverflow) |
| FR (1) | FR2315483A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1560556A (enrdf_load_stackoverflow) |
| SE (1) | SE416946B (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9844568B2 (en) | 2012-03-16 | 2017-12-19 | Ucl Business Plc | Porous carbon particles for use in the treatment or prevention of liver disease |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5489010A (en) * | 1977-12-27 | 1979-07-14 | Kureha Chem Ind Co Ltd | Spherical activated charcoal antidote |
| US4761284A (en) * | 1977-12-27 | 1988-08-02 | Kureha Kagaku Kogy Kabushiki Kaisha | Antidote including activated carbon particles |
| JPS54105897A (en) * | 1978-02-06 | 1979-08-20 | Kureha Chemical Ind Co Ltd | Adsorber for artificial organ |
| JPS6037046B2 (ja) * | 1978-02-06 | 1985-08-23 | 呉羽化学工業株式会社 | 低粉化性高強度活性炭およびその製造法 |
| JPS5510971A (en) * | 1978-07-12 | 1980-01-25 | Sumitomo Chemical Co | Blood purifying device |
| JPS56158712A (en) * | 1980-05-14 | 1981-12-07 | Teijin Ltd | Oral microcapsule of active carbon |
| JPS5731864A (en) * | 1980-08-04 | 1982-02-20 | Teijin Ltd | Oral activated carbon microcapsule |
| JPS5810056A (ja) * | 1981-07-10 | 1983-01-20 | 株式会社クラレ | 血液浄化装置 |
| DE3304349C3 (de) * | 1983-02-09 | 1995-10-26 | Bluecher Hubert | Flächenfilter und Verfahren zu seiner Herstellung |
| JPS59193826A (ja) * | 1983-04-20 | 1984-11-02 | Mochida Pharmaceut Co Ltd | 経口投与用活性炭 |
| DE3801457A1 (de) * | 1988-01-20 | 1989-08-03 | Hasso Von Bluecher | Aktivkohle mit hoher abriebfestigkeit und geringer feuchtigkeitsempfindlichkeit |
| AU3413893A (en) * | 1991-12-26 | 1993-07-28 | Ukrainian State Joint Stock Consortium Ekosorb | Method of obtaining a sorbent for medicinal use |
| BE1005999A4 (nl) * | 1992-06-19 | 1994-04-12 | Leuven K U Res & Dev | Absorbent voor cultuurmedium en een daarvan voorziene houder. |
| US9707331B2 (en) | 2011-11-07 | 2017-07-18 | Delcath Systems, Inc. | Apparatus for removing chemotherapy compounds from blood |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE830992C (de) * | 1949-12-30 | 1952-02-11 | Degussa | Verfahren zur Herstellung von Aktivkohle enthaltenden Praeparaten |
| US3533961A (en) * | 1966-02-07 | 1970-10-13 | Huber Corp J M | Method of producing spherical pellets of activated carbon |
| US3516791A (en) * | 1967-07-14 | 1970-06-23 | Canadian Patents Dev | Microporous carbon preparation |
| JPS4925117A (enrdf_load_stackoverflow) * | 1972-06-29 | 1974-03-06 | ||
| NL7401542A (enrdf_load_stackoverflow) * | 1973-02-09 | 1974-08-13 | ||
| JPS53752B2 (enrdf_load_stackoverflow) * | 1973-03-19 | 1978-01-11 | ||
| JPS5332637B2 (enrdf_load_stackoverflow) * | 1973-05-09 | 1978-09-09 | ||
| JPS5039636B2 (enrdf_load_stackoverflow) * | 1973-05-29 | 1975-12-18 | ||
| JPS5018879A (enrdf_load_stackoverflow) * | 1973-06-20 | 1975-02-27 | ||
| CA1060728A (en) * | 1973-07-26 | 1979-08-21 | Jack Fennimore | Treatment of particulate carbon with biocompatible polymer |
| GB1465519A (en) * | 1973-07-31 | 1977-02-23 | Nat Patent Dev Corp | Sorbents coated with a synthetic solid water-insoluble hydro philic polymer |
| JPS51148291A (en) * | 1975-06-13 | 1976-12-20 | Teijin Ltd | Artificial organ |
-
1975
- 1975-06-23 JP JP50075640A patent/JPS51151693A/ja active Pending
-
1976
- 1976-06-21 SE SE7607077A patent/SE416946B/xx not_active IP Right Cessation
- 1976-06-22 DE DE2627824A patent/DE2627824C3/de not_active Expired
- 1976-06-22 GB GB25833/76A patent/GB1560556A/en not_active Expired
- 1976-06-22 FR FR7618978A patent/FR2315483A1/fr active Granted
- 1976-06-23 CA CA255,516A patent/CA1057595A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9844568B2 (en) | 2012-03-16 | 2017-12-19 | Ucl Business Plc | Porous carbon particles for use in the treatment or prevention of liver disease |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2315483B1 (enrdf_load_stackoverflow) | 1978-06-30 |
| SE7607077L (sv) | 1976-12-24 |
| SE416946B (sv) | 1981-02-16 |
| FR2315483A1 (fr) | 1977-01-21 |
| DE2627824C3 (de) | 1982-04-15 |
| CA1057595A (en) | 1979-07-03 |
| JPS51151693A (en) | 1976-12-27 |
| DE2627824A1 (de) | 1977-01-13 |
| DE2627824B2 (de) | 1981-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |