IL40195A - Fluid-permeable microporous materials containing potassium titanate and process of making the same - Google Patents

Fluid-permeable microporous materials containing potassium titanate and process of making the same

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Publication number
IL40195A
IL40195A IL40195A IL4019572A IL40195A IL 40195 A IL40195 A IL 40195A IL 40195 A IL40195 A IL 40195A IL 4019572 A IL4019572 A IL 4019572A IL 40195 A IL40195 A IL 40195A
Authority
IL
Israel
Prior art keywords
accordance
potassium
permeable material
microporous
fluid
Prior art date
Application number
IL40195A
Other versions
IL40195A0 (en
Original Assignee
Pall Corp
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 Pall Corp filed Critical Pall Corp
Publication of IL40195A0 publication Critical patent/IL40195A0/en
Publication of IL40195A publication Critical patent/IL40195A/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/022—Filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/111—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0464—Impregnants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0627—Spun-bonded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0654—Support layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0668—The layers being joined by heat or melt-bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0681—The layers being joined by gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/08—Special characteristics of binders
    • B01D2239/086—Binders between particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1216—Pore size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/026—Porous

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Epidemiology (AREA)
  • Filtering Materials (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)

Abstract

1401231 Potassium titanates PALL CORP 17 Aug 1972 [17 Sept 1971] 38428/72 Heading C1A [Also in Divisions B2 D2 and B5] Potassium hexatitanate aggregates are prepared by heating potassium tetratitanate fibres at 700-1900‹ F. Fibres of these and other potassium polytitanate are formed into a fluid permeable microporous layer. [GB1401231A]

Claims (62)

Having regard to the foregoing disclosure, the following is claimed as the inventive and patentable embodiments thereof:
1. A process for preparing microporous fluid-permeable material having a maximum pore diameter of about 1.2 microns and having at least one microporous layer comprising potassium titanate fibrous material bonded together, which com prises flowing upon a porous substrate a dispersion in a dispersing liquid of potassium titanate fibrous material of potassium polytitanate higher than potassium dititanate and having a diameter of less than about 0- 5 and a ratio of length to diameter from about 5: 1 to about 300: 1, depositing the fibrous material upon and forming on the porous substrate a microporous layer of such fibrous material by flow through the substrate of the dispersing liquid, and then bonding the fibrous material in the layer together.
2. A process in accordance with claim 1, in which the layer is stripped from the substrate after bonding the fibers together.
3. A process in accordance with claim 1, in which the fibers of the layer are also bonded to the substrate.
4. A process in accordance with claim 3, wherein the substrate comprises paper.
5. A process in accordance with claim 3, wherein the substrate comprises a nonwoven fibrous sheet material.
6. A process in accordance with claim 1, in which
7. A process in accordance with claim 6, wherein the binding agent is an ethylene -vinyl acetate copolymer.
8. A process in accordance with claim 1, wherein the potassium polytitanate comprises potassium tetratitanate.
9. A process in accordance with claim 1, wherein the potassium polytitanate comprises potassium hexatitanate.
10. A, process in accordance with claim 1, wherein the potassium polytitanate comprises potassium octatitanate.
11. A process in accordance with claim 1, wherein the potassium polytitanate comprises a mixture of potassium tetratitanate and hexatitanate.
12. A process in accordance with claim 1, wherein the potassium polytitanate comprises a mixture of potassium tetratitanate and potassium octatitanate.
13. A process in accordance with claim 1, in which the dispersion of potassium titanate fibrous material also com prises coarse fibrous material having a diameter from about 0.005 to about 30 microns and an average ratio of length to diameter greater than about 20: 1 in an amount from about 0. 7 to about 200 parts per 100 parts of potassium titanate fibrous material.
14. A process in accordance with claim 13, in which the coarse fibers comprise glass fibers .
15. A process in accordance with claim 13, in which the coarse fibers comprise esparto fibers.
16. A process in accordance with claim 13, in which the coarse fibers comprise rayon fibers .
17. A process in accordance with claim 1, which comprises first flowing upon the porous substrate a dispersion in a dispersing liquid of coarse fibrous material having a diam eter from about 0.05 to about 30 microns and an average ratio of length to diameter greater than 20: 1, depositing the fibrous material upon and forming on the porous substrate a macroporous layer of such fibrous material lying almost entirely in planes approximately parallel to the plane of the layer by flow through the substrate of the dispersing liquid, and then flowing the dispersion of potassium titanate fibrous material through such layer and forming thereon a microporous layer of potassium titanate fibrous material.
18. A process in accordance with claim 17, in which both layers are bonded together and stripped from the substrate.
19. A process in accordance with claim 17, in which both layers are bonded together and macroporous layer is bonded to the substrate.
20. A process in accordance with claim 19, wherein the substrate comprises paper.
21. A process in accordance with claim 19, wherein the substrate comprises a nonwoven fibrous sheet material.
22. A process in accordance with claim 19, in which the fibrous dispersion includes a binding agent.
23. A process in accordance with claim 17, in which the dispersion of potassium .titanate. fibrous material also comprises coarse fibrous material having a diameter from about 0.05 to about 30 microns and an average ratio of length to diameter greater than parts of potassium titanate fibrous material.
24. A process in accordance with claim 23, in which the coarse fibers comprise glass fibers .
25. A process in accordance with claim 23, in which the coarse fibers comprise esparto fibers .
26. A process in accordance with claim 23, in which the coarse fibers comprise rayon fibers .
27. A process in accordance with claim 1, in which the potassium titanate fibrous material comprises aggregated potassium poly titanate.
28. A process in accordance with claim 1, which comprises heating the potassium titanate fibrous material at a temperature within the range from about 700° to about 1900° F . prior to incorporating it in the dispersion.
29. A microporous fluid-permeable material having a maximum pore diameter of 1.2 micron and comprising a micro-porous layer comprising potassium titanate fibrous material of potassium polytitanate higher than potassium dititanate and having a diam eter of less than about 0.5μ and a ratio of length to diameter from about 5: 1 to about 300: 1 and bonded together.
30. A microporous fluid -permeable material in accordance with claim 29, in which the maximum pore diam eter is 0.2 micron.
31. A microporous fluid-permeable material in accordance with claim 29, in which the potassium polytitanate comprises potassium tetratitanate .
32. A microporous fluid-permeable material in accordance with claim 29, in which the potassium polytitanate com prises potassium hexatitanate .
33. A microporous fluid -permeable material in accordance with claim 29, in which the potassium polytitanate com prises potassium octatitanate.
34. ,A microporous fluid -permeable material in accordance with claim 29, in which the potassium polytitanate com prises a mixture of potassium tetratitanate and potassium hex-titanate.
35. A microporous fluid -permeable material in accordance with claim 29, in which the potassium polytitanate com prises a mixture of potassium tetratitanate and potassium octatitanate.
36. A microporous fluid -permeable material in accordance with claim 29, in which the potassium titanate fibrous material comprises aggregated potassium polytitanate.
37. A microporous fluid -permeable material in accordance with claim 29, in which the potassium titanate fibrous material has been heat-treated at a temperature within the range from about 700° to about 1900°F .
38. A microporous fluid -permeable material in accordance with claim 29, wherein the layer is also bonded to a . substrate.
39. A microporous fluid -permeable material in accordance with claim 38, wherein the substrate is paper .
40. A microporous fluid-permeable material in accordance with claim 38, wherein the substrate is nonwoven fibrous material.
41. O A microporous fluid -permeable material in accordance with claim 29, wherein the fibrous material is bonded together by a binding agent homogeneously distributed throughout the layer. .
42. A microporous fluid-permeable material in accordance with claim 29, comprising a macroporous layer com prising coarse fibrous material having a diameter from about 0.05 to about 30 microns and an average ratio of length to diameter greater than 20: 1, lying almost entirely in planes approximately parallel to the plane of the layer, such fibrous material being bonded together and the macroporous layer being bonded to the microporous layer.
43. A microporous fluid-permeable material in accordance with claim 42, in which the macroporous layer is also bonded to a substrate.
44. A microporous fluid -permeable material in accordance with claim 29, in which the layer also comprises coarse fibrous material having a diameter from about 0.05 to about 30 microns and an average ratio of length to diameter greater than about 20: 1 in an amount from about 0.7 to about 200 parts per 100 parts of potassium titanate fibrous material.
45. A microporous fluid -perm eable material in accordance with claim 44, in which the coarse fibers comprise
46. A microporous fluid -permeable material in accordance with claim 44, in which the coarse fibers comprise esparto fibers .
47. A microporous fluid -permeable material in accordance with claim 44, in which the coarse fibers comprise rayon fibers.
48. A filter element comprising, in combination, a microporous fluid -permeable material in accordance with claim 29, formed in a cylinder with the ends sealed together in a side-seam seal, the cylinder having two open ends and an end cap closing off each of the open ends .
49. A filter element in accordance with claim 48, in which the microporous fluid -permeable material is in corrugated form .
50. A filter element in accordance with claim 48, in which the side-seam seal is sealed with a bonding agent com prising an amount within the range from about 5 to about 15% by weight of potassium titanate fibrous material.
51. A microporous fluid -permeable material in accordance with claim 29, wherein the material is juxtaposed to at least one facing layer of foram^nous plastic sheet material.
52. A microporous fluid -permeable material in accordance with claim 51, wherein the material is sandwiched between at least two facing layers of foraminous plastic sheet material.
53. A microporous fluid-permeable material in
54. A microporous fluid -permeable material in accordance with claim 51, wherein the facing layer comprises a thermoplastic netting material.
55. A microporous fluid-permeable material in accordance with claim 54, wherein the netting material is bonded to the microporous fluid -permeable material.
56. A microporous fluid -permeable material in accordance with claim 54, comprising at least two layers of microporous fluid-permeable material sandwiched between and bonded by three layers of netting material.
57. A microporous multilayer fluid-permeable material in accordance with claim 56, comprising a surface stratum of fibrous material on each exterior facing layer.
58. A filter element comprising a microporous fluid -permeable material in accordance with claim 55, formed in a closed cylindrical configuration and confined between end caps .
59. A filter element in accordance with claim 58, comprising a core within the cylinder, bonded to the end caps and to the fluid -permeable material.
60. A filter element in accordance with claim 58, in which the microporous fluid -permeable material is in corrugated form .
61. A microporous fluid -permeable material in accordance with claim 54, comprising two layers of microporous fluid -perm eable material and one facing layer of thermoplastic 40195/2
62. A microporous fluid-permeable material 1n accordance with claim 55, comprising two layers of microporous fluid-permeable material wherein the netting material 1s bonded to the microporous fluid-permeable material.
IL40195A 1971-09-17 1972-08-24 Fluid-permeable microporous materials containing potassium titanate and process of making the same IL40195A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18148271A 1971-09-17 1971-09-17

Publications (2)

Publication Number Publication Date
IL40195A0 IL40195A0 (en) 1972-10-29
IL40195A true IL40195A (en) 1976-11-30

Family

ID=22664454

Family Applications (3)

Application Number Title Priority Date Filing Date
IL47917A IL47917A (en) 1971-09-17 1972-08-24 Multiunit filter element array and a process for forming the same
IL40195A IL40195A (en) 1971-09-17 1972-08-24 Fluid-permeable microporous materials containing potassium titanate and process of making the same
IL47917A IL47917A0 (en) 1971-09-17 1975-08-13 A multiunit filter element array and a process for forming the same

Family Applications Before (1)

Application Number Title Priority Date Filing Date
IL47917A IL47917A (en) 1971-09-17 1972-08-24 Multiunit filter element array and a process for forming the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
IL47917A IL47917A0 (en) 1971-09-17 1975-08-13 A multiunit filter element array and a process for forming the same

Country Status (11)

Country Link
JP (1) JPS4848775A (en)
AU (1) AU472936B2 (en)
BE (1) BE788293A (en)
CA (1) CA980528A (en)
DE (1) DE2244811A1 (en)
FR (1) FR2152984A1 (en)
GB (2) GB1401231A (en)
IL (3) IL47917A (en)
IT (1) IT965383B (en)
NL (1) NL7212555A (en)
ZA (1) ZA725640B (en)

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Also Published As

Publication number Publication date
BE788293A (en) 1973-03-01
AU4564472A (en) 1974-02-21
IL40195A0 (en) 1972-10-29
ZA725640B (en) 1973-04-25
AU472936B2 (en) 1976-06-10
DE2244811A1 (en) 1973-03-29
GB1401231A (en) 1975-07-16
IT965383B (en) 1974-01-31
JPS4848775A (en) 1973-07-10
NL7212555A (en) 1973-03-20
IL47917A (en) 1976-11-30
IL47917A0 (en) 1975-11-25
GB1401232A (en) 1975-07-16
FR2152984A1 (en) 1973-04-27
CA980528A (en) 1975-12-30

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