US2587044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of cement raw slurry
Assignee: FLSmidth and Co AS
•
Filing: 1950-02-08
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Granted: 1952-02-26
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Expires: 1970-02-08
Abstract
No abstract record available.
Inventors
- 👤 Heilmann Thorbjorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:51
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/38; C04B7/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF PAREPARING RAW CEMENT SLURRY SUFFICIENTLY FLUID TO PUMP AND CONTAINING A QUANTITY OF WATER OTHERWISE INSUFFICIENT FOR THE PURPOSE, WHICH COMPRISES INCORPORATING IN THE SLURRY AN AMOUNT OF AN ALKALI HEXAMETAPHOSPHATE EFFECTIVE TO APPRECIABLY INCREASE THE FLUIDITY OF THE SLURRY, BUT NOT EXCEEDING ABOUT 0.2 PER CENT OF THE WEIGHT OF THE DRY MATERIALS PRESENT IN THE SLURRY.
Claim 2
Independent Claim
61 words
A METHOD OF PAREPARING RAW CEMENT SLURRY SUFFICIENTLY FLUID TO PUMP AND CONTAINING A QUANTITY OF WATER OTHERWISE INSUFFICIENT FOR THE PURPOSE, WHICH COMPRISES INCORPORATING IN THE SLURRY AN AMOUNT OF AN ALKALI HEXAMETAPHOSPHATE EFFECTIVE TO APPRECIABLY INCREASE THE FLUIDITY OF THE SLURRY, BUT NOT EXCEEDING ABOUT 0.2 PER CENT OF THE WEIGHT OF THE DRY MATERIALS PRESENT IN THE SLURRY.
References Cited (Backward Citations)
US1242236A
Cited
US1438588A
Cited
US2111517A
Cited
US2162525A
Cited
US2390225A
Cited
US2337597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |