US3689294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portland cement compositions and method
Assignee: Individual
•
Filing: 1971-06-14
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Granted: 1972-09-05
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Expires: 1991-06-14
Abstract
Abstract A FREE-FLOWING EXPANDING CEMENT PASTE IS MADE BY MIXING FINELY GROUND CEMENT WITH AT LEAST 0.0025 PART OF ALKALI OR ALKALINE EARTH LIGNOSULFONATE AND WITH ABOUT 0.20-0.28 PART OF WATER CONTAINING AT LEAST 0.0025 PART OF ALKALI CARBONATE. MIXTURES OF AGGREGATE WITH SUCH LOW-POROSITY PASTES YIELD, ON CURING, MORTARS AND CONCRETES OF IMPROVED STRENGTH AND DIMENSIONAL STABILITY.
Inventors
- 👤 Stephen Braunauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:44
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |