AU642493B2 - Mineral fibres which can decompose in a physiological medium - Google Patents
Mineral fibres which can decompose in a physiological medium Download PDFInfo
- Publication number
- AU642493B2 AU642493B2 AU77318/91A AU7731891A AU642493B2 AU 642493 B2 AU642493 B2 AU 642493B2 AU 77318/91 A AU77318/91 A AU 77318/91A AU 7731891 A AU7731891 A AU 7731891A AU 642493 B2 AU642493 B2 AU 642493B2
- Authority
- AU
- Australia
- Prior art keywords
- cao
- mgo
- mineral fibre
- fibres
- decompose
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2213/00—Glass fibres or filaments
- C03C2213/02—Biodegradable glass fibres
Description
AUSTRALIA
PATENTS ACT 1952 COMPLETE SPECIFICATION Form
(ORIGINAL)
FOR OFFICE USE Short Title: 642493 Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: a S@ 55 6
S
OS
TO BE COMPLETED BY APPLICANT Name of Applicant: Address of Applicant: ISOVER SAINT-GOBAIN "LES MIROIRS" 18 AVENUE D'ALSACE 92400 COURBEVOIE
FRANCE
OSS*SS
59 0
S.
S.
S
S.
Actual Inventor: Address for Service: GRIFFITH HACK CO., 601 St. Kilda Road, Melbourne, Victoria 3004, Australia.
Complete Specification for the invention entitled: MINERAL FIBRES WHICH CAN DECOMPOSE IN A PHYSIOLOGICAL MEDIUM.
The following statement is a full description of this invention including the best method of performing it known to me:- 2 MINERAL FIBRES WHICH CAN DECOMPOSE IN A PHYSIOLOGICAL MEDIUM The present invention relates to the sphere of mineral fibres; more precisely its object is mineral fibres of which the composition is such that they decompose as soon as they are in contact with a physiological medium.
see 0 Buildings are frequently insulated with respect to heat and sound by means of products essentially .consisting of mineral wool, such as rock wool. The particular arrangement of the premises to be insulated often leads the personnel responsible s e 0 for fitting these products to cut them in situ.
This operation causes the fibres to break and possibly some of them to be dispersed into the atmosphere. It results therefrom that sometimes a fibre may accidentally be inhaled.
Although the harmfulness of the inhaled fibres has not been proven, the need is felt to reassure users by offering them a product which can dissolve easily in a physiological medium.
The aim of the present invention is to propose mineral fibres of which the composition is such that they decompose rapidly when in contact with a physiological medium.
In particular, the aim of the present invention is fibres which can be obtained by conventional techniques of external centrifuging.
C S o These techniques are used to form fibres from glasses obtained by melting raw materials such as o65 blast furnace slag or basalts. Some of these techniques, also known as free centrifuging, consist in pouring a thin stream of molten glass onto the peripheral strip of a centrifuging wheel, oo. o go rotating at high speed about a shaft perpendicular to the direction of the thin glass stream. Under the effect of centrifugal force, some of the glass sf *is converted into fibres, the remainder being :conveyed to a further wheel where the same phenomenon occurs; three or four wheels may thus be interposed along the path of the molten glass.
The aims of the invention are achieved by modifying the known glass compositions used in free centrifuging techniques. On the basis of compositions of this type, essentially comprising silica and alumina, alkaline earth oxides, the inventors discovered that the addition of phosphorus pentoxide enables glasses to be obtained which, in fibre form, decompose rapidly in a physiological medium.
The glasses according to the invention furthermore have properties which, as regards the main ones amoni them, are similar to those of known glasses. It is thus that they can be converted into fibres using conventional centrifuging wheels.
According to the present invention there is provided a mineral fibre which can decompose in the presence of a physiological medium comprising the following constituents according to the following weight proportions in addition to impurities having a total weight content of equal to or less than 3%: SiO, 37 to 58% 20 Al,03 4 to 14% CaO 7 to
S..
MgO 4 to 16%
S..
P
2 Os 1 to Fe20 3 0 to 15% (total iron expressed 25 in this form) and the combined weight of Na 2 O and K is from 0.1% to 7%, wherein the amount of CaO MgO FeO 3 is greater than invznion t exrctzza in tri~i teirm eE Eerric oxide.
The compositions defined in this manner may be prepared from pure constituents but are generally obtained by the melting of a mixture of vitrifiable raw materials possibly with the addition of other oxides such as titanium oxide and manganese oxide, considered as impurities within the scope of the invention. The total content of these impurities is equal or less than approximately 3 weight percent.
S
ooS In order to be able to be used in external centrifuging techniques, the compositions according to the invention advantageously have adequate viscosity at a relatively low temperature. This depends to a great extent on the total amount of the oxides SiO 2 and A1 2 0 3 Within the scope of the invention, the amount of these oxides is generally equal to or greater than approximately 50 weight percent.
In addition, the production of the fibres depends on the ability of the glass, which is great to a lesser or greater extent, to develop crystals in its mass. This phenomenon, known as 0devitrification, is characterised by several 0* 0
S
S
temperatures: that at which the rate of crystal growth is at its maximum and that at which this rate of growth is zero (liquidus).
In the main part, this phenomenon is intensified to a greater or lesser extent depending on the total amount of alkaline earth oxides. Within the scope of the invention, this amount is less than approximately 40 weight percent.
In order to ensure that the fibres are sufficiently heat resistant, it is desirable for the amount of CaO MgO FeO03 to be greater than approximately 25 weight percent.
The range of preferred compositions according to the invention is delimited by the following weight proportions:
S
0e0U CS S
C.
0* 00 C a.
0* Si0, A1203 CaO Mg0 Fe203 PzOs Na 2 O KO2 Impurities 45 to 57% 3 to 6% 20 to 6 to 16% 0.1 to 4% 1 to 7% 0.1 to (3% 7 A further area of compositions according to the invention is defined by the following weight proportions: SiO 2 39 to Al 20 7 to 13% CaO 20 to MgO 6 to 16% Fe 2 03 0.1 to 4% P, 0 3 to 9% Na20 K 2 0 0.1 to Impurities 3% The advantages of the invention are given in the following description, illustrated by some nonlimiting examples.
The measurements of the degree of decomposition in the physiological medium were performed on fibres of which the diameter is constant and is approximately 10 Fm.
These fibres are immersed in a solution which simulates an extracellular fluid and of which the composition is as follows (expressed in g/l): MgC12.6H 0 0.212 NaC1 6.415 Na 2
HPO
4 0.148 Na 2
SO
4 .2H20 0.179 CaC12.4H 2 0 0.318 NaHCO 3 2.703 (Na 2 tartrate).2HO 0.180 (Na 3 citrate).5,5H 2 0 0.186 Na lactate 0.175 Na pyruvate 0.172 Glycine 0.118 0 The test conditions selected for determining the degree of decomposition of the glass fibres in this solution are as follows: two hundred mg of fibres are placed between two perforated discs separated by a circular ring. These two discs, 4.3 centimetres in diameter, are covered with a polycarbonate filter. This assembly forms a measuring cell through which there circulates the e* solution of which the flow rate is regulated by a peristaltic pump. This flow rate is 40 ml per day, the duration of the test being 20 days. The cell and the flask containing the attacking solution are maintained at a temperature of 370 C. After passing through the cell, the attacking solution is collected in bottles in order to be analysed subsequently.
The amount of dissolved silica is measured by analysis; the weight of dissolved silica in relation to the weight of silica initially present in the fibre gives a percentage result, which is a good indicator of the capacity of the fibre tested to decompose in a physiological medium.
The compositions tested and the results obtained are presented in tables I and 2 enclosed.
r Table 1 shows the compositions according to the invention and two known compositions used as a reference (glasses no. 1 and no. 4).
The presence of phosphorus pentoxide in the Table 1 shows the compositions according to the invention always results in an increase in the amount of silica dissolved in the attacking solution of the fibres obtained from the said compositions, as compared rewith fibres of which the composition comprises hardly any phosphorus.
Table 2 contains some test results obtained when this observation is applied.
A comparison of glasses nos. i and 3, on the one hand, and glasses nos. 4 and no. 6, on the other, hand, and glasses nos. 4 and no. 6, on the other, shows that the effect of reducing the alumina and replacing this amount by silica causes a considerable increase in the degree of decomposition of the fibres tested.
A comparison between glasses nos. 2 and 3, and between glasses nos. 5 and 6, shows that in glasses of which the degree of decomposition is considerable, the substitution of silica by
C.
phosphorus pentoxide causes a remarkable increase in the degree of decomposition on the fibres *o tested.
The influence of phosphorus pentoxide on the degree of decomposition of the fibres is still quite considerable in a glass with a high alumina :content, as displayed by glasses nos. 4 and 7.
The phosphorus is added to the vitrifiable mixture in the form of disodic phosphate or calcium
C
ago phosphate for example. When the amount of phosphate introduced into the vitrifiable mixture is relatively large, its melting may sometimes be difficult. It is for this reason that the phosphorus pentoxide content of the compositions is less than or equal to approximately 10 weight percent.
11 The compositions according to the invention, which have both the viscosity and devitrification properties suitable for the fibre-drawing process by external centrifuging, and, in the fibre state, have a high rate of decomposition in a physiological medium, comprise less than approximately 7 weight percent of alkaline oxides.
The mineral fibres according to the invention listed in table n° 1 are all resistant at a temperature of approximately 700 0
C.
a. It was found that samples blocks of those fibres (100 kg/m heated into an oven during 30 minutes show a sagging lower than 10% at 700 0
C.
The glasses according to the invention may be Gas converted into fibres by known external centrifuging devices, such as those described in Goos.: patents US-A-2 663 051, EP-A-0 167 508 or Fr-A- 2 609 708, for example.
SO
The fibres obtained in this way enable excellent quality fibrous products suitable for numerous 6e4 r applications to be obtained. Thus, for example, the fibres according to the invention are advantageously used in the form of geometrically well-defined panels, strengthened by a polymer binder, or in the form of tubular products for insulating pipes. The fibres according to the invention may also be used in the form of a mat sewn over cardboard or metal grilles, in the form of a strip, or even in bulk form by filling.
12 TABLE NO.1 Compositions in weight percentages Consti- :Glass:GlassiGlasstGlassiclass.class Glass Glass" tuents :n1 n 0 2 n 0 3 n 0 4 n65 n06 jo7' n08 SiC 2 47,1: 49,9: 5614i 45,7: 49,7: 52;7: 39,7: 44,9: Fe 2 0 3 12,9: 12,9: 12,9: 2,1: 2 ,12e: 10 :A1 2 0 3 :13,8; 4,5: 4,B: 11,5: 4,5: 4,5: 11,5:
.:SOON
0: :Ca.0 10,3: 10,3: 10,i 29,5: 29r 29,5: 29,5: 29,5: finfin flan mfaa n f S MO an- -a n fnff ii ifff ifffnffn a -M aso fi eamS a n :Na 2 0 2,7: 2,7: 1,4s 1,4: 1,4s 1,4-: Ka 1 fin 1Fn 1,3 1,n 1,3: 1,3: lfi njaaa aa a o SO* P 2 08 0,3: 3 6 :o 3 aflamann fnnan----- -MM M M Mnn :impuritie,$ 2,6 2,9 2,6 1,0 1,1 ,0,9 1 e 0, 7 S 0 TABLE NO.2 Chemical resistance in physiological medium Amount of dissolved Sio 2 (in percent) 'ddration :Glass:Glass.Glass-Glass.Glass: Glass:Glass: Glass: o f tes-t i n~l 2 n-3 n-4 nQ5 nO6 n07 n 0 8 a days :0,7 :5,1 2,5 0,9 11,4: 5,2 2,6 5,3
Claims (8)
1. A mineral fibre which can decompose in the presence of a physiological medium comprising the following constituents according to the following weight proportions in addition to impurities having a total weight content of equal to or less than 3%: SiO 2 37 to 58% A1 2 0 3 4 to 14% CaO 7 to MgO 4 to 16% P 2 Os 1 to Fe2O 3 0 to 15% (total iron expressed in this form) and the combined weight of NaO2 and K 2 0 is from 0.1% to 7%, wherein the amount of CaO MgO Fe 2 0 3 is greater than 0o.
2. A mineral fibre according to claim 1, in which the combined total amount of SiO 2 A1 2 0 3 is greater than approximately 25
3. A mineral fibre according to claim 1 or 2, in which the amount of CaO MgO is less than
4. A mineral fibre according to any one of the preceding claims, comprising: SiO 2 45 to 57% A1 2 0 3 3 to 6% CaO 20 to MgO 6 to 16% Fe 2 O 3 P 2 0 5 Na.O K 2 0 0.1 to 4% 1 to 7% 0.1 to
5. A mineral fibre according to any one of claims 1 to 3, comprising: Si0 2 A1 2 0 3 CaO MgO Fe 2 03 P 2 0s Na2O K 2 0 40 to 7 to 13% 20 to 6 to 16% 0 to 4% 3 to 9% 0.1 to a
6. A product for heat and/or sound insulation comprising at least partially of mineral fibres having a chemical composition in accordance with any on of the preceding claims.
7. A mineral fibre substantially as hereinbefore described with reference to any one of the foregoing examples.
8. A product for heat and/or sound insulation substantially as hereinbefore described with reference to any one of the foregoing examples. Dated this 13th day of August 1993 ISOVER SAINT-GOBAIN By its Patent Attorneys: GRIFFITH HACK CO Fellows Institute of Patent Attorneys of Australia. MINERAL FIBRES WHICH CAN DECOMPOSE IN A PHYSIOLOGICAL MEDIUM ABSTRACT The present invention relates to mineral fibre compositions which can decompose when in contact with a physiological medium. a. -a e. Advantageous compositions comprise the following constituents in the proportions by weight defined below: &*Ogg: a SiO, 37 to 58% at 2 A1,0, 4 to 14% U a CaO 7 to MgO 4 to 16% P0, 1 to Fe 2 0 0 to 15% (total iron expressed in this form) the amount of Ca0 Mg0 Fe20, being greater than and the oxides NaOz and K 2 0, of which the total percentage is less than 7
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9006841A FR2662688B1 (en) | 1990-06-01 | 1990-06-01 | MINERAL FIBERS LIKELY TO DECOMPOSE IN A PHYSIOLOGICAL ENVIRONMENT. |
| FR9006841 | 1990-06-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU7731891A AU7731891A (en) | 1991-12-05 |
| AU642493B2 true AU642493B2 (en) | 1993-10-21 |
Family
ID=9397189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU77318/91A Ceased AU642493B2 (en) | 1990-06-01 | 1991-05-27 | Mineral fibres which can decompose in a physiological medium |
Country Status (27)
| Country | Link |
|---|---|
| EP (1) | EP0459897B1 (en) |
| JP (1) | JP3121374B2 (en) |
| KR (1) | KR100198907B1 (en) |
| CN (1) | CN1035937C (en) |
| AR (1) | AR245082A1 (en) |
| AT (1) | ATE121378T1 (en) |
| AU (1) | AU642493B2 (en) |
| BR (1) | BR9102232A (en) |
| CA (1) | CA2043699C (en) |
| CZ (1) | CZ282135B6 (en) |
| DE (1) | DE69108981T2 (en) |
| DK (1) | DK0459897T3 (en) |
| ES (1) | ES2073136T3 (en) |
| FI (1) | FI912634A (en) |
| FR (1) | FR2662688B1 (en) |
| HR (1) | HRP940812B1 (en) |
| HU (1) | HU212280B (en) |
| IE (1) | IE68877B1 (en) |
| NO (1) | NO310184B1 (en) |
| NZ (1) | NZ238315A (en) |
| PL (1) | PL167825B1 (en) |
| PT (1) | PT97824B (en) |
| SI (1) | SI9110957A (en) |
| SK (1) | SK280187B6 (en) |
| TR (1) | TR28864A (en) |
| YU (1) | YU47731B (en) |
| ZA (1) | ZA914026B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8163377B2 (en) | 2005-11-10 | 2012-04-24 | The Morgan Crucible Company Plc | High temperature resistant fibres |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI93346C (en) † | 1990-11-23 | 1998-03-07 | Partek Ab | Mineral Fiber Composition |
| US5843854A (en) * | 1990-11-23 | 1998-12-01 | Partek Paroc Oy Ab | Mineral fibre composition |
| US5994247A (en) * | 1992-01-17 | 1999-11-30 | The Morgan Crucible Company Plc | Saline soluble inorganic fibres |
| FR2690438A1 (en) * | 1992-04-23 | 1993-10-29 | Saint Gobain Isover | Mineral fibers capable of dissolving in a physiological medium. |
| DE4228353C1 (en) | 1992-08-26 | 1994-04-28 | Didier Werke Ag | Inorganic fiber |
| DK156892D0 (en) * | 1992-12-29 | 1992-12-29 | Rockwool Int | MINERAL FIBER PRODUCT |
| DK156692D0 (en) * | 1992-12-29 | 1992-12-29 | Rockwool Int | MINERAL FIBER PRODUCT |
| US5811360A (en) * | 1993-01-15 | 1998-09-22 | The Morgan Crucible Company Plc | Saline soluble inorganic fibres |
| CA2154442C (en) † | 1993-01-15 | 2004-04-13 | Gary Anthony Jubb | Saline soluble inorganic fibres |
| ES2196040T3 (en) * | 1993-01-15 | 2003-12-16 | Morgan Crucible Co | INORGANIC FIBERS SOLUBLE IN SALIN DISSOLUTIONS. |
| GB9314230D0 (en) * | 1993-07-09 | 1993-08-18 | Pilkington Plc | Compositions for high temperature fiberisation |
| PL177839B1 (en) * | 1994-02-11 | 2000-01-31 | Rockwool Int | Man-made glass fibres |
| US5691255A (en) * | 1994-04-19 | 1997-11-25 | Rockwool International | Man-made vitreous fiber wool |
| DE4417231C3 (en) * | 1994-05-17 | 2000-06-29 | Gruenzweig & Hartmann | Use of a composition as a material for biodegradable mineral fibers |
| NZ287440A (en) * | 1994-05-28 | 1997-03-24 | Saint Gobain Isover | Biologically degradable glass fibre compositions |
| DE9422034U1 (en) * | 1994-05-28 | 1997-10-02 | Gruenzweig & Hartmann | Glass fiber compositions |
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| HRP950332A2 (en) * | 1994-08-02 | 1997-04-30 | Saint Gobain Isover | Mineral-fiber composition |
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| DE4443022C2 (en) * | 1994-12-02 | 1996-12-12 | Gruenzweig & Hartmann | Mineral fiber composition |
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| WO2019074794A1 (en) | 2017-10-10 | 2019-04-18 | Unifrax 1 Llc | Crystalline silica free low biopersistence inorganic fiber |
| US10882779B2 (en) | 2018-05-25 | 2021-01-05 | Unifrax I Llc | Inorganic fiber |
| FR3086284B1 (en) * | 2018-09-26 | 2022-07-22 | Saint Gobain Isover | MINERAL WOOL |
| TW202311192A (en) * | 2021-05-13 | 2023-03-16 | 日商日本電氣硝子股份有限公司 | Glass fiber, and method for producing same |
| WO2023166788A1 (en) * | 2022-03-03 | 2023-09-07 | 日東紡績株式会社 | Glass composition for glass fibers, glass fiber, glass fiber woven fabric, and glass-fiber-reinforced resin composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247817A1 (en) * | 1986-05-28 | 1987-12-02 | Pfizer Inc. | Alkali-resistant glass fiber |
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| US2663051A (en) * | 1951-01-24 | 1953-12-22 | Johns Manville | Method and apparatus for fiberizing mineral materials |
| SU525634A1 (en) * | 1975-01-21 | 1976-08-25 | Научно-Техническое Объединение "Грузниистром" Министерства Промышленности Строительных Материалов Грузинской Сср | Glass fiberglass |
| FI56820C (en) * | 1978-09-27 | 1980-04-10 | Paraisten Kalkki Oy | GLASKOMPOSITION AVSEDD FOER FRAMSTAELLNING AV FIBER |
| SU947112A1 (en) * | 1980-02-15 | 1982-07-30 | Всесоюзный Научно-Исследовательский Институт Теплоизоляционных И Акустических Строительных Материалов И Изделий | Mineral fiber |
| SU1211233A1 (en) * | 1984-01-27 | 1986-02-15 | Научно-производственное объединение "Камень и силикаты" | Opacified glass |
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1990
- 1990-06-01 FR FR9006841A patent/FR2662688B1/en not_active Expired - Fee Related
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1991
- 1991-05-27 AU AU77318/91A patent/AU642493B2/en not_active Ceased
- 1991-05-28 ZA ZA914026A patent/ZA914026B/en unknown
- 1991-05-29 TR TR00551/91A patent/TR28864A/en unknown
- 1991-05-29 NZ NZ238315A patent/NZ238315A/en not_active IP Right Cessation
- 1991-05-29 YU YU95791A patent/YU47731B/en unknown
- 1991-05-29 SI SI9110957A patent/SI9110957A/en not_active IP Right Cessation
- 1991-05-29 PL PL91290465A patent/PL167825B1/en not_active IP Right Cessation
- 1991-05-30 EP EP91401394A patent/EP0459897B1/en not_active Revoked
- 1991-05-30 ES ES91401394T patent/ES2073136T3/en not_active Expired - Lifetime
- 1991-05-30 SK SK1625-91A patent/SK280187B6/en not_active IP Right Cessation
- 1991-05-30 IE IE184691A patent/IE68877B1/en not_active IP Right Cessation
- 1991-05-30 CZ CS911625A patent/CZ282135B6/en not_active IP Right Cessation
- 1991-05-30 DK DK91401394.1T patent/DK0459897T3/en active
- 1991-05-30 DE DE69108981T patent/DE69108981T2/en not_active Revoked
- 1991-05-30 AT AT91401394T patent/ATE121378T1/en not_active IP Right Cessation
- 1991-05-30 JP JP03126439A patent/JP3121374B2/en not_active Expired - Fee Related
- 1991-05-30 NO NO19912090A patent/NO310184B1/en not_active IP Right Cessation
- 1991-05-31 HU HU911833A patent/HU212280B/en not_active IP Right Cessation
- 1991-05-31 FI FI912634A patent/FI912634A/en unknown
- 1991-05-31 CA CA002043699A patent/CA2043699C/en not_active Expired - Lifetime
- 1991-05-31 BR BR919102232A patent/BR9102232A/en not_active IP Right Cessation
- 1991-05-31 CN CN91104364A patent/CN1035937C/en not_active Expired - Fee Related
- 1991-05-31 PT PT97824A patent/PT97824B/en active IP Right Grant
- 1991-05-31 AR AR91319833A patent/AR245082A1/en active
- 1991-06-01 KR KR1019910009165A patent/KR100198907B1/en not_active IP Right Cessation
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1994
- 1994-10-26 HR HRP-957/91A patent/HRP940812B1/en not_active IP Right Cessation
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0247817A1 (en) * | 1986-05-28 | 1987-12-02 | Pfizer Inc. | Alkali-resistant glass fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8163377B2 (en) | 2005-11-10 | 2012-04-24 | The Morgan Crucible Company Plc | High temperature resistant fibres |
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