US3332791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing portland cement compositions
Assignee: Rayonier Inc
•
Filing: 1964-05-12
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Granted: 1967-07-25
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Expires: 1984-05-12
Abstract
No abstract record available.
Inventors
- 👤 Steinberg John Charles
- 👤 Gray Kenneth Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:17
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B24/00; C04B24/04; C04B24/08; C04B24/085; C04B24/16; C04B24/161; C04B24/168; C04B24/24; C04B24/38; C04B24/383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A PROCESS FOR PRODUCING PORTLAND CEMENT SLURRIES, THE IMPROVEMENT WHICH COMPRISES MIXING WITH THE CEMENT, WATER HAVING IN SOLUTION A DISPERSANT FOR THE CEMENT IN AN AMOUNT BETWEEN 0.01 AND 0.30% BY WEIGHT, ON A DRY BASIS, BASED ON THE CEMENT, SAID DISPERSANT BEING THE WATER-SOLUBLE PRODUCT OF REACTING A WATER-SOLUBLE CARBOHYDRATE OF THE GROUP CONSISTING OF A MONOSACCHARIDE, SUCROSE, PARTIALLY HYDROLYZED STARCY AND MIXTURES THEREOF WITH A WATER-SOLUBLE SALT OF SULFUROUS ACID IN AN AMOUNT EQUIVALENT TO 0.05 TO 0.40 PART OF SO2 PER PART OF CARBOHYDRATE AT A TEMPERATURE OF 120 TO 170*C. UNTIL FROM 15 TO 75% OF THE CARBOHYDRATE IS CONVERTED INTO A WATERSOLUBLE COMPLEX, WHEREBY THE AMOUNT OF WATER NECESSARY TO FORM THE CEMENT-CONTAINING ARTICLE IS MATERIALLY REDUCED AND THE STRENGTH OF THE RESULTING SET ARTICLE IS IMPROVED.
Claim 2
Dependent Claim
134 words
IN A PROCESS FOR PRODUCING PORTLAND CEMENT SLURRIES, THE IMPROVEMENT WHICH COMPRISES MIXING WITH THE CEMENT, WATER HAVING IN SOLUTION A DISPERSANT FOR THE CEMENT IN AN AMOUNT BETWEEN 0.01 AND 0.30% BY WEIGHT, ON A DRY BASIS, BASED ON THE CEMENT, SAID DISPERSANT BEING THE WATER-SOLUBLE PRODUCT OF REACTING A WATER-SOLUBLE CARBOHYDRATE OF THE GROUP CONSISTING OF A MONOSACCHARIDE, SUCROSE, PARTIALLY HYDROLYZED STARCY AND MIXTURES THEREOF WITH A WATER-SOLUBLE SALT OF SULFUROUS ACID IN AN AMOUNT EQUIVALENT TO 0.05 TO 0.40 PART OF SO2 PER PART OF CARBOHYDRATE AT A TEMPERATURE OF 120 TO 170*C. UNTIL FROM 15 TO 75% OF THE CARBOHYDRATE IS CONVERTED INTO A WATERSOLUBLE COMPLEX, WHEREBY THE AMOUNT OF WATER NECESSARY TO FORM THE CEMENT-CONTAINING ARTICLE IS MATERIALLY REDUCED AND THE STRENGTH OF THE RESULTING SET ARTICLE IS IMPROVED.
References Cited (Backward Citations)
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US2429211A
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US2485102A
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US2690975A
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US2927033A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |