US3682669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cement and method of producing same
Assignee: Flintkote Co
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Filing: 1970-10-30
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Granted: 1972-08-08
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Expires: 1990-10-30
Abstract
Abstract GROUND MIXTURES OF CONVENTIONAL PORTLAND CEMENTMAKING COMPONENTS ARE MIXED WITH RELATIVELY SMALL AMOUNTS OF BORON-CONTAINING COMPONENTS, AND THE MIXTURES ARE BURNED AT KILN TEMPERATURES SUBSTANTIALLY BELOW THOSE NORMALLY UTILIZED TO FORM CLINKER. THE RESULTANT CLINKER IS MORE EASILY GRINDABLE THAN THAT PRODUCED IN CONVENTIONAL PROCESSES OF PORTLAND CEMENT PRODUCTION, AND THE CEMENT RESULTING FROM THE GRINDING OF THE CLINKER YIELDS CEMENTITIOUS PRODUCT POSSESSING SUBSTANTIALLY HIGH COMPRESSIVE STRENGTH IS EXHIBITED BY PORTLAND CEMENT MADE FROM THE SAME COMPONENTS IN THE ASSENCE OF THE BORON-CONTAINING COMPONENT.
Inventors
- 👤 Thomas C Slater
- 👤 Floyd C Hamilton Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:48
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/38; C04B7/42
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |