US3634567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of steam curing hydraulic setting calcareous cement and silica containing compositions
Assignee: J-M A/C PIPE Corp A DE CORP
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Filing: 1969-04-14
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Granted: 1972-01-11
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Expires: 1989-04-14
Abstract
Abstract METHOD OF HYDROTHERMALLY CURING HYDRAULIC CEMENTITIOUS COMPOSITIONS HAVING A BINDER PHASE PRIMARILY COMPOSED OF HYDRAULIC SETTING CALCAREOUS CEMENT AND SILICA REACTANTS, COMPRISING A STEPWISE, TWO-STAGE STEAM CURING PROCEDURE OF SUBJECTING A BODY OF THE COMPOSITION ESSENTIALLY CONTAINING THE HYDRAULIC SETTING CALCAREOUS CEMENT AND SILICA REACTANTS AS THE PRIMARY SOURCE OF THE BINDER PHASE, TO AN ATMOSPHERE OF STEAM APPLIED THERETO AT TWO DISTINCT AND SEQUENTIALLY INCREASED PRESSURE LEVELS.
Inventors
- 👤 Julie Chin-Sun Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:32
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/02; Y; Y10; Y10S; Y10S264/00; Y10S264/43
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |