US4803058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisturized compositions of hydrate-forming phosphates and methods for preparation thereof
Assignee: Astaris LLC
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Filing: 1988-05-12
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Granted: 1989-02-07
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Expires: 2008-05-12
Abstract
Abstract A composition of matter in particulate, crystalline form. The composition comprises a hydrate-forming phosphate selected from the group consisting of sodium tripolyphosphate, sodium pyrophosphate and trisodium phosphate, between about 0.1% by weight and about 23% by weight added water in the form of water of hydration said water containing in solution sufficient surfactant to provide the composition from about 0.20 ppm and about 125 ppm of a surfactant. Methods for preparing such compositions are also disclosed.
Inventors
- 👤 Louis A. Highfill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:03
CPC Classifications
A; A23; A23B; A23B4/00; A23B4/02; A23B4/023; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/30; C01B25/38; C01B25/40; C01B25/41; C01B25/418; C01B25/42; C01B25/425
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
75 words
A composition of matter in particulate, crystalline form, free-flowing during storage and prolonged exposure to ordinary ambient temperature and humidity conditions, having an increased rate of hydration and resistance to caking comprising sodium tripolyphosphate, and from about 0.1% by weight and about 23% by weight added water in the form of water of hydration, said water containing in solution sufficient surfactant to provide the composition with from about 0.2 ppm to about 125 ppm surfactant.
Claim 2
Dependent Claim
75 words
A composition of matter in particulate, crystalline form, free-flowing during storage and prolonged exposure to ordinary ambient temperature and humidity conditions, having an increased rate of hydration and resistance to caking comprising sodium tripolyphosphate, and from about 0.1% by weight and about 23% by weight added water in the form of water of hydration, said water containing in solution sufficient surfactant to provide the composition with from about 0.2 ppm to about 125 ppm surfactant.
Claim 3
Dependent Claim
19 words
A composition as set forth in claim 1 having a one-minute rate of hydration of above about 92° C.
Claim 4
Dependent Claim
17 words
A composition as set forth in claim 1 wherein the hydrate-forming phosphate comprises Phase II sodium tripolyphosphate.
Claim 5
Dependent Claim
23 words
A composition as set forth in claim 1 wherein the hydrate-forming phosphate comprises a mixture of Phase I and Phase II sodium tripolyphosphate.
Claim 6
Dependent Claim
18 words
A composition as set forth in claim 1 further comprising at most about 0.1% by weight free water.
Claim 7
Dependent Claim
33 words
A powder composition as set forth in claim 1 in which at least 60% of the particles are smaller than 270 mesh, and essentially all of the particles are smaller than 60 mesh.
Claim 8
Dependent Claim
32 words
A composition as set forth in claim 1 in which at least 40% of the particles are larger than 60 mesh, and essentially all of the particles are larger than 100 mesh.
Claim 9
Dependent Claim
14 words
A composition as set forth in claim 1 wherein the phosphate is fully hydrated.
Claim 10
Dependent Claim
37 words
A composition as set forth in claim 1 containing between about 0.5 percent by weight and about 2 percent by weight water and the surfactant is present in an amount between 1 ppm and about 10 ppm.
Claim 11
Dependent Claim
58 words
A composition as set forth in claim 9 wherein the composition is a powder having at least 60% of the particles smaller than 270 mesh, and essentially all of the particles smaller than 60 mesh and has a one-minute rate of hydration of above about 85° C. and a five-minute rate of hydration of above about 92° C.
Claim 12
Dependent Claim
29 words
A composition as set forth in claim 1 wherein the phosphate is sodium tripolyphosphate and the water content is in the range of from about 12% to about 23%.
Claim 13
Dependent Claim
25 words
A composition as set forth in claim 11 wherein the surfactant is present in the range of from about 100 ppm to about 125 ppm.
Claim 14
Dependent Claim
67 words
A composition of matter in particulate, crystalline form, free-flowing during storage and prolonged exposure to ordinary ambient temperature and humidity conditions, having an increased rate of hydration and resistance to caking comprising sodium tripolyphosphate, between about 0.1% by weight and about 4% by weight water in the form of water of hydration and between about 0.2 ppm and about 20 ppm of a surfactant in the composition.
Claim 15
Dependent Claim
67 words
A composition of matter in particulate, crystalline form, free-flowing during storage and prolonged exposure to ordinary ambient temperature and humidity conditions, having an increased rate of hydration and resistance to caking comprising sodium tripolyphosphate, between about 0.1% by weight and about 4% by weight water in the form of water of hydration and between about 0.2 ppm and about 20 ppm of a surfactant in the composition.
Claim 16
Dependent Claim
60 words
A granular sodium tripolyphosphate composition free-flowing during storage and prolonged exposure to ordinary ambient temperature and humidity conditions, having an increased rate of hydration and resistance to caking comprising from about 21% to about 23% added water, said water containing in solution sufficient surfactant to provide the composition from about 100 ppm to about 125 ppm surfactant in the composition.
Claim 17
Dependent Claim
60 words
A granular sodium tripolyphosphate composition free-flowing during storage and prolonged exposure to ordinary ambient temperature and humidity conditions, having an increased rate of hydration and resistance to caking comprising from about 21% to about 23% added water, said water containing in solution sufficient surfactant to provide the composition from about 100 ppm to about 125 ppm surfactant in the composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |