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Patent US3565649A successfully refreshed from Google Patents.
US3565649A
Expired / Lapsed
US
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Process for grinding portland cement
Assignee: SCM Glidco Organics Corp
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Filing: 1968-05-16
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Granted: 1971-02-23
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Expires: 1988-05-16
Abstract
Abstract THIS INVENTION RELATES TO A METHOD OF GRINDING PORTLAND CEMENT CLINKER WITHIN AN AQUEOUS ADMIX CONSISTING ESSENTIALLY OF SUBSTANTIALLY COMPLETELY SAPONIFIED PITCH OR TALL OIL ROSIN OR A MIXTURE THEREOF, HAVING FROM 5% TO 70% TOTAL SOLIDS TO YIELD AN IMPROVED CEMENT PRODUCT. THE ADMIX IS ADDED WITH THE CLINKER IN AN AMOUNT SUFFICIENT TO LEAVE A RESIDUE OF ABOUT 0.005% TO ABOUT 0.5% BY WEIGHT OF CEMENT PRODUCT IN THE RESULTANT CEMENT.
Inventors
- 👤 James N Stone
- 👤 George H Eick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:57
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/36; C04B24/34
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |