Patent US3667978A successfully refreshed from Google Patents.
US3667978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-weight high-strength cement compositions
Assignee: ADOLF RENKE
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Filing: 1969-05-26
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Granted: 1972-06-06
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Expires: 1989-05-26
Abstract
Abstract A HYDRAULIC CEMENT BINDER CONSISTING OF MAGNESIUM OXIDE, MAGNESIUM SULFATE AND CALCIUM CHLORIDE IN PROPORTION SUCH THAT A MAGNESIUM OXYCHLORIDE-MAGNESIUM OXYSULFATE/CALCIUM SULFATE HARDENABLE MASS IS PRODUCED UPON ADDITION OF WATER AND SETTING. THE BINDER IS COMBINDED WITH ORGANIC MATTER WHICH IS TREATED TO PARTIALLY HYDROLYZE THE CELLULOSIC MATERIAL AND THEREAFTER NEUTRALIZE IT. FOR DECREASED BRITTLENESS AND INCREASED WATERPROOFING CHARACTERISTICS, THE BINDER CONTAINS SODIUM SILICATE AND SILICOFLUORIDE.
Inventors
- 👤 Anatole N Vassilevsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:52
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/30; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |