US3178299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-hardening water glass cement composition
Assignee: Hoechst AG
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Filing: 1962-07-24
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Granted: 1965-04-13
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Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 Wilborn Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:00
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B22/00; C04B22/0013
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A SELF-HARDENING WATER GLASS CEMENT COMPOSITION CONSISTING ESSENTIALLY OF AN INERT FILLER SELECTED FROM THE GROUP CONSISTING OF SILICON DIOXIDES, ALUMINUM SILICATES, SILICON CARBIDE AND HEAVY SPAAR, ABOUT 37 TO 45 PARTS BY WEIGHT PER 100 PARTS OF SAID FILLER OF AN ALKALI SILICATE SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SILICATES HAVING AN SIO2 TO ALKALI OXIDE RATIO IN THE RANGE OF ABOUT 3 TO 4:1, AND A HARDENER WHICH IS THE CONDENSATION PRODUCT OF FROM ABOUT 0.8 TO 1.2 MOLS OF BORIC ACID PER MOL OF PHOSPHORIC ACID AND WHICH IS USED IN AN AMOUNT WITHIN THE RANGE OF ABOUT 1% TO 10% BY WEIGHT CALCULATED ON THE TOTAL WEIGHT OF SAID FILLER AND SAID HARDENER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |