US3743525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cements from glass powders
Assignee: Corning Glass Works
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Filing: 1971-04-15
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Granted: 1973-07-03
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Expires: 1991-04-15
Abstract
Abstract THE PRESENT INVENTION TO THE PRODUCTION OF HARD, STRONG, EASILY PREPARED HYDRAULIC CEMENTS FROM GLASS POWDERS IN THE GENERAL COMPOSITION FIELD R2O-RO-SIO2, WHEREIN R2O CONSISTS OF NA2O AND/OR K2O AND RO CONSISTS OF MGO, CAO, SRO AND/OR BAO. THE ADDITION OF THE H2PO4-ANION TO THE GLASS POWDERS GREATELY IMPROVES THE COMPRESSIVE STRENGTH OF THE RESULTANT CEMENT AND, IN FREQUENT INSTANCES, SHORTENS THE REQUIRED SETTING TIME FOR THE CEMENT.
Inventors
- 👤 R Farrauto
- 👤 W Haynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:16
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/062; C03C3/097; C04; C04B; C04B7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |