US3753749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete compositions
Assignee: Cement Marketing Co Ltd
•
Filing: 1971-08-12
•
Granted: 1973-08-21
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Expires: 1991-08-12
Abstract
Abstract In concrete compositions based on hydraulic cement, improved properties in respect of workability, especially mouldability, capacity for being impelled along a pipe as by pumping, and frost resistance in the concrete, are obtained by incorporating in the composition a minor proportion of dispersed cellulose fibres such as paper making fibres.
Inventors
- 👤 Nutt W Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:29
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/18; C04B18/24; C04B18/241; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
A cementitious composition according to claim 1 wherein the cellulose fibers are paper fibers.
Claim 2
Dependent Claim
27 words
A composition according to claim 2 wherein the cellulose fibers are tissue paper fibers having a mean fiber length of from about 1 to about 3 millimeters.
Claim 3
Dependent Claim
76 words
Concrete consisting essentially of hardened Portland cement, sand and coarser stone aggregate material in the respective proportions by volume of from about 1 : 2 : 4 to about 1 : 4 : 8, and from about 0.2 percent to about 5 percent by weight based on the cement, of dispersed cellulose fibers having a length of below about 3 mm. which are insoluble in a wet concrete mix so as to retain their fibrous state.
Claim 4
Independent Claim
116 words
The method of transporting a concrete-making composition consisting essentially of Portland cement, sand and coarser stone aggregate material in the respective proportions by volume of from about 1 : 2 : 4 to about 1 : 4 : 8, from a mixing site to a placement site through a pipeline, which method comprises dispersing in said concrete-making composition from about 0.2 percent to about 5 percent by weight based on the weight of the cement, of segregated cellulose fibers which are insoluble in said concrete-making composition so as to retain their fibrous state, whereby the mechanical power required to transfer said composition through said pipeline is reduced, and thereafter impelling the fiber-containing composition through said pipeline.
Claim 5
Dependent Claim
12 words
The method of claim 5 wherein the cellulose fibers are paper fibers.
Claim 6
Dependent Claim
26 words
The method of claim 6 wherein the paper fibers are paper tissue fibers having a mean fiber length of from about 1 to about 3 mm.
References Cited (Backward Citations)
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |