US2970925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a cement clinker
Assignee: Individual
•
Filing: 1958-09-18
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Granted: 1961-02-07
•
Expires: 1978-09-18
Abstract
No abstract record available.
Inventors
- 👤 Dyckerhoff Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:39
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF MANUFACTURING CEMENT CLINKER POOR IN RELATIVELY LOW MELTING COMPONENTS AND COMPRISING A MAJOR AMOUNT OF TRI-CALCIUM SILICATE CONSISTING OF THE STEPS OF FIRST FINELY GRINDING SILICON DIOXIDE (SIO2) TO A FINENESS OF LESS THAN 30U, THEN ADMIXING GROUND CALCIUM CARBONATE TO SAID SILICON DIOXIDE IN A PROPORTION TO ARRIVE AT A SILICA MODULUS OF MORE THAN 5.0, SAID FINE GRINDING TAKING PLACE PRIOR TO SAID ADMIXING STEP, AND BURNING SAID MIXTURE AT A TEMPERATURE RANGE OF 1400*C. TO 1450*C.
Claim 2
Independent Claim
82 words
A METHOD OF MANUFACTURING CEMENT CLINKER POOR IN RELATIVELY LOW MELTING COMPONENTS AND COMPRISING A MAJOR AMOUNT OF TRI-CALCIUM SILICATE CONSISTING OF THE STEPS OF FIRST FINELY GRINDING SILICON DIOXIDE (SIO2) TO A FINENESS OF LESS THAN 30U, THEN ADMIXING GROUND CALCIUM CARBONATE TO SAID SILICON DIOXIDE IN A PROPORTION TO ARRIVE AT A SILICA MODULUS OF MORE THAN 5.0, SAID FINE GRINDING TAKING PLACE PRIOR TO SAID ADMIXING STEP, AND BURNING SAID MIXTURE AT A TEMPERATURE RANGE OF 1400*C. TO 1450*C.
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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |