US3725324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of manufacturing dry wall taping and finishing compounds with a nitrogenous-modified amylaceous binder
Assignee: Krause Milling Co
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Filing: 1971-05-27
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Granted: 1973-04-03
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Expires: 1991-05-27
Abstract
Abstract Urea is combined with a gelatinized amylaceous material using water in an amount less than 20 percent of the total mix, and the mixture is subsequently heated to obtain a binder for use in a dry wall finishing compound.
Inventors
- 👤 R Cummisford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:39
CPC Classifications
C; C09; C09J; C09J103/00; C09J103/02; C08; C08L; C08L2666/00; C08L2666/28
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
21 words
A method as set forTh in claim 1 in which the amylaceous material is cereal grain or an amylaceous fraction thereof.
Claim 2
Dependent Claim
15 words
A method as set forth in claim 1 in which the nitrogen compound is urea.
Claim 3
Dependent Claim
33 words
A method as set forth in claim 1 in which the nitrogen compound is of the general formula (R1R2N)2C:X where R1 and R2 are H or CH3, and X is O or S.
Claim 4
Dependent Claim
21 words
A method as set forth in claim 1 in which the nitrogen compound is of the family containing the chemical grouping
Claim 5
Dependent Claim
28 words
A method as set forth in claim 1 in which the nitrogen compound is selected from the group comprising the following: urea, guanidine, thiourea, biurea, biuret, and dicyandiamide.
Claim 6
Dependent Claim
37 words
A method as set forth in claim 1 in which the amylaceous material is selected from a group comprising corn flour, corn starch, grain sorghum flour, corn meal, corn grits, milo meal, milo grits, and wheat flour.
Claim 7
Dependent Claim
40 words
A method as set forth in claim 1 in which the binder is 3.0 percent-10.0 percent of the total weight of the joint compound, and wherein the filler is 90 percent-97 percent of the total weight of the joint compound.
Claim 8
Dependent Claim
19 words
A method as set forth in claim 3 in which the binder includes a minor percentage of polyvinyl alcohol.
Claim 9
Dependent Claim
27 words
A method as set forth in claim 1 in which the gelatinization of the amylaceous material and the heating of the binder mixture are effected by extrusion.
Claim 10
Dependent Claim
40 words
A wallboard joint compound comprising a mixture of a major proportion of a joint compound filler and a minor proportion of a binder wherein the binder comprises a mixture of a nitrogen compound from the family containing the chemical grouping
Claim 11
Dependent Claim
22 words
A wallboard joint compound as claimed in claim 11 in which the amylaceous material is cereal grain or an amylaceous fraction thereof.
Claim 12
Dependent Claim
16 words
A wallboard joint compound as claimed in claim 11 in which the nitrogen compound is urea.
Claim 13
Dependent Claim
29 words
A wallboard joint compound as claimed in claim 11 in which the nitrogen compound is selected from a group comprising the following: urea, biurea, biuret, thiourea, guanidine, and dicyandiamide.
Claim 14
Dependent Claim
34 words
A wallboard joint compound as claimed in claim 11 in which the nitrogen compound is of the general formula (R1R2N)2C:X, where R1 and R2 are H or CH3, and X is O or S.
Claim 15
Dependent Claim
22 words
A wallboard joint compound as claimed in claim 11 in which the nitrogen compound is of the family containing the chemical grouping
Claim 16
Dependent Claim
40 words
A wallboard joint compound as claimed in claim 11 in which the amylaceous material is selected from the group comprising the following: corn flour, corn starch, grain sorghum flour, corn meal, corn grits, milo meal, milo grits, and wheat flour.
Claim 17
Dependent Claim
42 words
A wallboard joint compound as claimed in claim 11 in which the filler is 90 percent-97 percent of the total weight of the joint compound, and in which the binder is 3 percent-10 percent of the total weight of the joint compound.
Claim 18
Dependent Claim
20 words
A wallboard joint compound as claimed in claim 11 in which the binder includes a minor percentage of polyvinyl alcohol.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |