US3928049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali-resistant mineral fibers useful for the reinforcement of various moulded articles
Assignee: Japan Asbestos Co Ltd
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Filing: 1974-07-02
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Granted: 1975-12-23
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Expires: 1994-07-02
Abstract
Abstract This invention relates to an alkali-resistant mineral fiber usable as a reinforcing material in preparing calcium silicatecontaining molded articles and cement- or gypsum-containing molded articles, which comprises 35 to 50% by weight of silica; 5 to 35% by weight of iron oxide and/or manganese oxide; and 7 to 19% by weight of zirconium oxide as essential components.
Inventors
- 👤 Takashi Otouma
- 👤 Susumu Aoki
- 👤 Toshihiro Minaki
- 👤 Kenichi Shibata
- 👤 Kentaro Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:34
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/001; C03C13/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
AN ALKALI-RESISTANT GLASSY FIBER USABLE AS A REINFORCING MATERIAL IN CALCIUM SILICATE-CONTAINING MOLDED ARTICLES AND CEMENT- OR GYPSUM-CONTAINING MOLDED ARTICLES, WHICH CONSISTS ESSENTIALLY OF 38 TO 50.0% BY WEIGHT OF SILICA; 10 TO 35% BY WEIGHT OF IRON OXIDE AND MANGANESE OXIDE; AND 15 TO 19% BY WEIGHT OF ZIRCONIUM OXIDE.
Claim 2
Dependent Claim
51 words
AN ALKALI-RESISTANT GLASSY FIBER USABLE AS A REINFORCING MATERIAL IN CALCIUM SILICATE-CONTAINING MOLDED ARTICLES AND CEMENT- OR GYPSUM-CONTAINING MOLDED ARTICLES, WHICH CONSISTS ESSENTIALLY OF 38 TO 50.0% BY WEIGHT OF SILICA; 10 TO 35% BY WEIGHT OF IRON OXIDE AND MANGANESE OXIDE; AND 15 TO 19% BY WEIGHT OF ZIRCONIUM OXIDE.
Claim 3
Dependent Claim
42 words
The alkali-resistant glassy fiber of claim 1, wherein the glassy composition contains an effective amount of at least one fusion aid selected from the group consisting of alkali metal oxides, alkaline earth metal oxides, boric anhydride, calcium fluoride, alumina and titanium oxide.
Claim 4
Dependent Claim
42 words
The alkali-resistant glassy fiber of claim 1, which consists essentially of 45.0 to 49.5% by weight of silica; 18.5 to 23.0% by weight of iron oxide, 3.5 to 9.0% by weight manganese oxide; and 15.0 to 18.5% by weight of zirconium oxide.
Claim 5
Dependent Claim
47 words
The alkali-resistant glassy fiber of claim 1 which consists of 45.0% by weight SiO2, 7.5% by weight Al2O3, 15.0% by weight ZrO2, 18.5% by weight Fe2O3, 3.5% by weight MnO, 2.9% by weight MgO, 5.5% by weight CaO, 1.5% by weight Na2O and 0.6% by weight TiO2.
Claim 6
Dependent Claim
27 words
The alkali-resistent glassy fiber of claim 1 which consists of 49.5% by weight SiO2, 18.5% by weight ZrO2, 23.0% by weight Fe2O3 and 9.0% by weight MnO.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |