US4073658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cement composition
Assignee: Kao Corp
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Filing: 1977-01-26
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Granted: 1978-02-14
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Expires: 1997-01-26
Abstract
Abstract A hydraulic cement composition containing a hydrogenation product of an oligosaccharide, such as a hydrolyzate of starch, cellulose or hemicellulose, having an average molecular weight of 300 to 3,500, as an agent for improving the properties of the cement.
Inventors
- 👤 Naoteru Ohtani
- 👤 Tutomu Koyama
- 👤 Takashi Takeuchi
- 👤 Toshihiro Azuma
- 👤 Morio Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:17
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A hydraulic cement composition comprising hydraulic cement, water and, optionally, aggregate, said composition containing from 0.01 to 0.3 weight percent, based on the weight of said hydraulic cement, of a hydrogenated oligosaccharide having an average molecular weight of from 300 to 3500, wherein the hydrogenation has transformed the terminal aldehyde groups of the oligosaccharide to hydroxyl groups.
Claim 2
Dependent Claim
57 words
A hydraulic cement composition comprising hydraulic cement, water and, optionally, aggregate, said composition containing from 0.01 to 0.3 weight percent, based on the weight of said hydraulic cement, of a hydrogenated oligosaccharide having an average molecular weight of from 300 to 3500, wherein the hydrogenation has transformed the terminal aldehyde groups of the oligosaccharide to hydroxyl groups.
Claim 3
Dependent Claim
29 words
A composition according to claim 1 in which the amount of said hydrogenated oligosaccharide is from 0.03 to 0.25 weight percent, based on the weight of said hydraulic cement.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 in which said oligosaccharide is a hydrolyzate of starch, cellulose or hemicellulose.
References Cited (Backward Citations)
US3414420A
Cited
US3503768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |