US4266980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansive solidifying material
Assignee: Sumitomo Osaka Cement Co Ltd
•
Filing: 1979-09-07
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Granted: 1981-05-12
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Expires: 1999-09-07
Abstract
Abstract An expansive solidifying material which consists of gypsum, blast furnace slag and portland type cement as the main components and soluble aluminate as a hardening promoter. The expansive solidifying material of the invention is quite suitable for solidifying poor grounds containing much water and the solidifying material is quite excellent in the initial hardening, long term strength, water absorption, expansibility and the reduction of production cost.
Inventors
- 👤 Akira Chudo
- 👤 Tomomitsu Sugi
- 👤 Kouji Kataoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:39
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/02; C09K17/10; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B7/00; C04B7/32; C04B7/323; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
An expansive solidifying material comprising: 15 to 40% by weight of gypsum; 25 to 40% by weight of blast furnace slag; 30 to 50% by weight of Portland cement; and not more than 10% by weight of a soluble aluminate selected from the group consisting of aluminous cement, aluminum sludge obtained in the remelting of aluminum material, burnt alunite, alumite sludge and red muddy slag occurring in the melting process of bauxite.
Claim 2
Dependent Claim
72 words
An expansive solidifying material comprising: 15 to 40% by weight of gypsum; 25 to 40% by weight of blast furnace slag; 30 to 50% by weight of Portland cement; and not more than 10% by weight of a soluble aluminate selected from the group consisting of aluminous cement, aluminum sludge obtained in the remelting of aluminum material, burnt alunite, alumite sludge and red muddy slag occurring in the melting process of bauxite.
Claim 3
Dependent Claim
29 words
The expansive solidifying material as in claim 1, wherein the specific surface area of said solidifying material is in the range of 2500 to 4500 cm 2 /g, inclusive.
References Cited (Backward Citations)
US2947643A
Cited
US3140956A
Cited
US3489582A
Cited
US3861929A
Cited
US3997353A
Cited
US4045237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |