Patent US3705413A successfully refreshed from Google Patents.
US4294622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry wall joint and finishing compounds
Assignee: Weston Research Corp
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Filing: 1980-06-09
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Granted: 1981-10-13
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Expires: 2000-06-09
Abstract
Abstract The dry wall joint compound, which can be used to completely close and fill joints between adjoining panel of gypsum dry wall board without a tape material, comprises a powdered mixture of gypsum, hydrated gypsum, calcium carbonate, plaster of paris, hydrated amorphous silica and talc. The dry wall joint compound can be admixed with water to provide a dry wall joint cement and preferably is admixed with a liquid additive composition comprising an aqueous mixture of zinc oxide, sodium acetate, ammonium alum, and an acrylic resin.
Inventors
- 👤 William F. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:49
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B2103/00; C04B2103/10; C04B2103/12; C04B2103/14; C04B2103/30; C04B2103/44; C04B2111/00; C04B2111/00474; C04B2111/00663; C04B2111/00672
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A liquid additive composition for admixing with a wall board joint compound to provide a joint cement, said liquid additive composition comprising an aqueous mixture containing about 0.35 to about 8 weight % zinc oxide, about 0.35 to about 1.5 weight % sodium acetate, about 0.35 to about 3 weight % ammonium alum, and about 0.35 to about 8 weight % of an acrylic resin, based on the total weight of the aqueous mixture.
Claim 2
Dependent Claim
74 words
A liquid additive composition for admixing with a wall board joint compound to provide a joint cement, said liquid additive composition comprising an aqueous mixture containing about 0.35 to about 8 weight % zinc oxide, about 0.35 to about 1.5 weight % sodium acetate, about 0.35 to about 3 weight % ammonium alum, and about 0.35 to about 8 weight % of an acrylic resin, based on the total weight of the aqueous mixture.
Claim 3
Dependent Claim
36 words
A liquid additive composition according to clam 1 containing about 0.7 weight % zinc oxide, about 0.7 weight % sodium acetate, about 0.7 weight % ammonium alum, and about 0.7 weight % of the acrylic resin.
Claim 4
Dependent Claim
36 words
A liquid additive composition according to clam 1 containing about 0.7 weight % zinc oxide, about 0.7 weight % sodium acetate, about 0.7 weight % ammonium alum, and about 0.7 weight % of the acrylic resin.
References Cited (Backward Citations)
GB1390360A
Cited
SU479743A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |