Patent US4961790A successfully refreshed from Google Patents.
US4961790A
Expired / Lapsed
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Concrete admixture device and method of using same
Assignee: Fritz Chemical Co
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Filing: 1989-05-19
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Granted: 1990-10-09
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Expires: 2009-05-19
Abstract
Abstract A device comprising a solid or powdered concrete admixture contained in a water-soluble container such that when the container and its contents are introduced into a wet mixer and agitated for a period of time, the water-soluble container is dissolved and the contents are released into the wet mixer. A separate water-insoluble receptacle is used to house and store the water-soluble container and its contents. In addition, there is disclosed a method for modifying the properties of a concrete by introducing a pre-weighed amount of solid admixture contained in a water-soluble container into a wet mixer and thereafter agitating the resulting mix.
Inventors
- 👤 Dwight Smith
- 👤 Jack L. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:03
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B24/18; B; B28; B28C; B28C5/00; B28C5/003; C04B40/00; C04B40/0028; C04B40/06; C04B40/0633; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C04B2103/00; C04B2103/0068; C04B2103/0077; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A method for modifying the properties of a concrete comprising: introducing a solid admixture, contained in a water-soluble container, into a wet mixer to give a resulting mix, said solid admixture being selected from the group consisting of air-entraining admixtures, air detrainer admixture, accelerating admixture, alkali-reactivity reducer, superplasticizer, pumping aids, water-reducing admixture, corrosion inhibitor, permeability reducer, and fibers; said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.
Claim 2
Independent Claim
105 words
A method for modifying the properties of a concrete comprising: introducing a solid admixture, contained in a water-soluble container, into a wet mixer to give a resulting mix, said solid admixture being selected from the group consisting of air-entraining admixtures, air detrainer admixture, accelerating admixture, alkali-reactivity reducer, superplasticizer, pumping aids, water-reducing admixture, corrosion inhibitor, permeability reducer, and fibers; said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.
Claim 3
Independent Claim
76 words
A method for retarding the setting of a concrete comprising: introducing a solid retarding admixture contained in a water-soluble container, into a wet mixer to give a resulting mix, said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.
Claim 4
Independent Claim
76 words
A method for retarding the setting of a concrete comprising: introducing a solid retarding admixture contained in a water-soluble container, into a wet mixer to give a resulting mix, said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.
Claim 5
Independent Claim
75 words
A method for retarding the setting of a concrete comprising: introducing a solid lignosulfonate contained in a water-soluble container, into a wet mixer to give a resulting mix, said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.
Claim 6
Independent Claim
75 words
A method for retarding the setting of a concrete comprising: introducing a solid lignosulfonate contained in a water-soluble container, into a wet mixer to give a resulting mix, said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.
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) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |