Patent US3939100A successfully refreshed from Google Patents.
US3939100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination alkali metal pyrophosphate-alkaline earth metal pyrophosphate detergent builder
Assignee: Procter and Gamble Co
•
Filing: 1975-02-14
•
Granted: 1976-02-17
•
Expires: 1995-02-14
Abstract
Abstract Alkali metal pyrophosphates and alkaline earth metal pyrophosphates are combined to provide a builder system for detergent compositions.
Inventors
- 👤 Thomas J. Hau
- 👤 Steven D. Cherney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:55
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/1226; C02; C02F; C02F5/00; C02F5/08; C02F5/086; C11D3/04; C11D3/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
48 words
A detergent additive comprising: a. an alkali metal pyrophosphate; and b. an alkaline earth metal pyrophosphate having a mean particle diameter of less than 25 microns; in a weight ratio of the alkali metal pyrophosphate to the alkaline earth metal pyrophosphate of from about 60:1 to about 1:8.
Claim 2
Dependent Claim
48 words
A detergent additive comprising: a. an alkali metal pyrophosphate; and b. an alkaline earth metal pyrophosphate having a mean particle diameter of less than 25 microns; in a weight ratio of the alkali metal pyrophosphate to the alkaline earth metal pyrophosphate of from about 60:1 to about 1:8.
Claim 3
Dependent Claim
40 words
The composition of claim 1 additionally comprising a supplemental alkaline material at from about 1% to about 30% by weight selected from the group consisting of alkali metal carbonates, and alkali metal and alkaline earth metal hydroxides and mixtures thereof.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the alkaline earth metal pyrophosphate is calcium or magnesium pyrophosphate.
Claim 5
Dependent Claim
24 words
The composition of claim 3 wherein the mean particle diameter of the alkaline earth metal pyrophosphate is from about 0.01 to about 1 micron.
Claim 6
Dependent Claim
27 words
The composition of claim 4 wherein the weight ratio of the alkali metal pyrophosphate to the alkaline earth metal pyrophosphate is from about 20:1 to about 1:1.
Claim 7
Dependent Claim
15 words
The composition of claim 5 wherein the alkaline earth metal pyrophosphate is the calcium salt.
Claim 8
Dependent Claim
14 words
The composition of claim 6 wherein the alkali metal pyrophosphate is the sodium salt.
Claim 9
Dependent Claim
13 words
The composition of claim 2 wherein the supplemental alkaline material is sodium carbonate.
Claim 10
Dependent Claim
59 words
A detergent composition comprising: a. from about 5% to about 60% by weight of an alkali metal pyrophosphate; b. from about 1% to about 50% by weight of an alkaline earth metal pyrophosphate having a mean particle diameter of less than 25 microns and c. from about 2% to about 40% by weight of an organic detergent surfactant component.
Claim 11
Dependent Claim
59 words
A detergent composition comprising: a. from about 5% to about 60% by weight of an alkali metal pyrophosphate; b. from about 1% to about 50% by weight of an alkaline earth metal pyrophosphate having a mean particle diameter of less than 25 microns and c. from about 2% to about 40% by weight of an organic detergent surfactant component.
Claim 12
Dependent Claim
26 words
A detergent composition in accordance with claim 9 wherein the organic detergent is selected from the group consisting of anionic and nonionic detergents and mixtures thereof.
Claim 13
Dependent Claim
25 words
The detergent composition of claim 10 wherein the mean particle diameter of the alkaline earth metal pyrophosphate is from about 0.01 to about 1 micron.
Claim 14
Dependent Claim
28 words
The detergent composition of claim 11 wherein the weight ratio of the alkali metal pyrophosphate to the alkaline earth metal pyrophosphate is from about 20:1 to about 1:1.
Claim 15
Dependent Claim
23 words
The detergent composition of claim 12 wherein the alkali metal pyrophosphate and the alkaline earth metal pyrophosphate are sodium pyrophosphate and calcium pyrophosphate.
Claim 16
Dependent Claim
45 words
The detergent composition of claim 13 wherein the sodium pyrophosphate is present at from about 8% to about 40%, the calcium pyrophosphate is present at from about 2% to about 30%, and the detergent is present at from about 5% to about 30% by weight.
Claim 17
Dependent Claim
49 words
The detergent composition of claim 14 wherein the detergent component is a nonionic selected from the group consisting of alkoxylated alcohols and alkoxylated alkyl phenols having from 8 to 20 carbon atoms in the alkyl radical and from 1 to 30 alkoxy units per alkyl radical and mixtures thereof.
Claim 18
Dependent Claim
43 words
The detergent composition of claim 15 wherein the nonionic is an ethoxylated alcohol wherein the alcohol residue with from 10 to 16 carbon atoms and the degree of ethoxylation is from 1 to 10 moles of ethylene oxide per mole of alcohol residue.
Claim 19
Dependent Claim
12 words
The detergent composition of claim 14 wherein the detergent component is anionic.
Claim 20
Dependent Claim
34 words
The composition of claim 17 wherein the anionic detergent is selected from the group consisting of the alkali metal and ammonium salts of alkyl ether sulfates, alkyl benzene sulfonates, alkyl sulfates, and alpha-sulfocarboxylic acids.
Claim 21
Dependent Claim
40 words
The detergent composition of claim 9 additionally comprising a supplemental alkaline material at from about 1% to about 30% by weight selected from the group consisting of alkali metal carbonates, alkali metal, and alkaline earth metal hydroxides and mixtures thereof.
References Cited (Backward Citations)
US2829110A
Cited
US2876166A
Cited
US2992186A
Cited
US2876168A
Cited
US3001945A
Cited
US3409393A
Cited
US3235505A
Cited
US3393154A
Cited
BE798856A
Cited
US3865754A
Cited
US3885029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |