US3068110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of grinding portland cement using a phenolic compound as a grinding aid
Assignee: FLSmidth and Co AS
•
Filing: 1960-04-20
•
Granted: 1962-12-11
•
Expires: 1980-04-20
Abstract
No abstract record available.
Inventors
- 👤 Fagerholt Gunnar Rindal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:13
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/02; B; B02; B02C; B02C23/00; B02C23/06; C04B2103/00; C04B2103/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF GRINDING CRYSTALLINE MATERIALS OF THE CLASS CONSISTING OF CEMENT, CEMENT CLINKER, AND GYPSUM WHICH COMPRISES INTRODUCING THE MATERIALS INTO A MILL WITH A CHARGE OF LOOSE GRINDING BODIES, INTRODUCING INTO THE MILL AT LEAST ONE MEMBER OF THE CLASS, CONSISTING OF PHENOL, POLY-PHENOLS HAVING MORE THAN ONE HYDROXYL GROUP IN THE BENZENE RING, AND PHENOLS HAVING AT LEAST ONE METHYL SUBSTITUENT IN THE BENZENE RING BUT OTHERWISE UNSUBSTITUTED, IN AN AMOUNT RANGING FROM 0.01% TO ABOUT 0.25 OF THE WEIGHT OF THE MATERIALS BEING GROUND, AND OPERATING THE MILL.
Claim 2
Independent Claim
92 words
A METHOD OF GRINDING CRYSTALLINE MATERIALS OF THE CLASS CONSISTING OF CEMENT, CEMENT CLINKER, AND GYPSUM WHICH COMPRISES INTRODUCING THE MATERIALS INTO A MILL WITH A CHARGE OF LOOSE GRINDING BODIES, INTRODUCING INTO THE MILL AT LEAST ONE MEMBER OF THE CLASS, CONSISTING OF PHENOL, POLY-PHENOLS HAVING MORE THAN ONE HYDROXYL GROUP IN THE BENZENE RING, AND PHENOLS HAVING AT LEAST ONE METHYL SUBSTITUENT IN THE BENZENE RING BUT OTHERWISE UNSUBSTITUTED, IN AN AMOUNT RANGING FROM 0.01% TO ABOUT 0.25 OF THE WEIGHT OF THE MATERIALS BEING GROUND, AND OPERATING THE MILL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |