Patent US5224595A successfully refreshed from Google Patents.
US5224595A
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US
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Package of cement mixing material
Assignee: Taisei Corp
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Filing: 1991-11-06
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Granted: 1993-07-06
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Expires: 2011-11-06
Abstract
Abstract Using a packaging material containing a fibrous substance such as pulp and a carboxyl-containing polymer a substance such as an acid type carboxymethyl cellulose, a cement mixing material such as a superplasticizer is packaged and the package is thrown into a cement formulation such as concrete, mortar or a cement paste in a truck agitator.
Inventors
- 👤 Kenji Sugimoto
- 👤 Koichi Nagase
- 👤 Yoshimitsu Sekiguchi
- 👤 Toshihiro Okada
- 👤 Takehiko Kurusu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:52
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B40/00; C04B40/0028; C04B2103/00; C04B2103/0068; C04B2103/0077; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
20 words
A substantially water-insoluble and alkali-hydrolyzable package comprising a fiber and a carboxyl-containing polymer, to be disintegrated in a cement admixture.
Claim 2
Dependent Claim
20 words
A substantially water-insoluble and alkali-hydrolyzable package comprising a fiber and a carboxyl-containing polymer, to be disintegrated in a cement admixture.
Claim 3
Dependent Claim
31 words
A package as claimed in claim 1, wherein said carboxyl-containing polymer is a polysaccharide derivative selected from the group consisting of carboxymethyl cellulose, carboxyethyl cellulose and carboxymethylated starch or salts thereof.
Claim 4
Dependent Claim
21 words
A package as claimed in claim 1, wherein said carboxyl-containing polymer is a homopolymer or a copolymer of a carboxyl-containing monomer.
Claim 5
Dependent Claim
23 words
A package as claimed in claim 1, wherein the weight ratio of the carboxyl-containing polymer to the fibrous material is 80/20 to 0.1/99.9.
Claim 6
Dependent Claim
12 words
A package as claimed in claim 1, wherein said fiber is pulp.
Claim 7
Dependent Claim
14 words
A package as claimed in claim 2, wherein said polysaccharide derivative is carboxymethyl cellulose.
Claim 8
Dependent Claim
65 words
A package as claimed in claim 1, wherein said package encompasses at least one member selected from the group consisting of a superplasticizer, an air-entraining agent, a water-reducing agent, a super water-reducing agent, a foaming agent, a gas foaming agent, a setting accelerator, a setting retarder, a rust or corrosion inhibitor, a permeability reducer, a shrinkage reducing agent, a coloring agent, and a reinforcing material.
Claim 9
Dependent Claim
34 words
A package for a constituent of a cement admixture consisting essentially of a carboxyl-containing polymer and a fiber, the package being alkali hydrolyzable, whereby the package is able to disintegrate in the cement admixture.
Claim 10
Dependent Claim
34 words
A package for a constituent of a cement admixture consisting essentially of a carboxyl-containing polymer and a fiber, the package being alkali hydrolyzable, whereby the package is able to disintegrate in the cement admixture.
Claim 11
Dependent Claim
26 words
A package as claimed in claim 1, wherein said carboxyl-containing polymer is selected from the group consisting of fibrous carboxymethyl cellulose, carboxyethyl cellulose and salts thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |