US4017322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reinforcing aqueous hydraulic cement
Assignee: Japan Inorganic Material Co Ltd
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Filing: 1975-06-09
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Granted: 1977-04-12
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Expires: 1995-06-09
Abstract
Abstract Aqueous solutions containing phosphoric acid, phosphate, or a salt of titanium, zirconium or hafnium are useful for forming coatings on the glass fiber surfaces. Such coatings may be formed by immersing the glass fiber in the solution at elevated temperatures. The coating enhances the alkali corrosion resisting properties of the glass fiber, so that the glass fibers surface-treated therewith are particularly useful as reinforcement in aqueous hydraulic cement mixtures for imparting to the curved products made therefrom, physical strength which is stable with elapse of time.
Inventors
- 👤 Motochika Kawai
- 👤 Izuru Shimozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:35
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/1025; C03C25/1035
Claims Analysis
Total Claims: 0
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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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |