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US4470839A
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US
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Solid particles containing metal peroxides, their preparation and their use for the amendment of soils
Assignee: Solvay Chimie SA
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Filing: 1982-04-27
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Granted: 1984-09-11
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Expires: 2002-04-27
Abstract
Abstract Solid particles of metal peroxide are coated by means of a coating agent containing a water-soluble condensed phospahte.
Inventors
- 👤 Ignace Gago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:57
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/04; C01B15/043; C05; C05D; C05D9/00; Y; Y10; Y10S; Y10S71/00; Y10S71/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
Solid particles containing a metal peroxide, coated by means of a coating agent, for use for the amendment of soils, wherein the coating agent contains 30 to 100% by weight water-soluble condensed phosphate and is present in an amount of 0.1 to 40% of the weight of the particles, and the metal peroxide is a peroxide of a metal from group 2 of the periodic table of the elements.
Claim 2
Dependent Claim
69 words
Solid particles containing a metal peroxide, coated by means of a coating agent, for use for the amendment of soils, wherein the coating agent contains 30 to 100% by weight water-soluble condensed phosphate and is present in an amount of 0.1 to 40% of the weight of the particles, and the metal peroxide is a peroxide of a metal from group 2 of the periodic table of the elements.
Claim 3
Dependent Claim
26 words
Particles according to claim 1, wherein the coating agent contains, as the condensed phosphate, an alkali metal polyphosphate or metaphosphate or an ammonium polyphosphate or metaphosphate.
Claim 4
Dependent Claim
16 words
Particles according to claim 2, wherein the coating agent contains, as the condensed phosphate, sodium tripolyphosphate.
Claim 5
Dependent Claim
16 words
Particles according to claim 2, wherein the coating agent contains, as the condensed phosphate, sodium hexametaphosphate.
Claim 6
Dependent Claim
14 words
Particles according to claim 1, wherein the coating agent also contains a pH regulator.
Claim 7
Dependent Claim
12 words
Particles according to claim 1, wherein the metal peroxide is calcium peroxide.
Claim 8
Dependent Claim
33 words
Process for the preparation of particles according to claim 1, wherein a solution of the coating agent is sprayed onto moving particles of metal peroxide, and the solvent is evaporated from the solution.
Claim 9
Dependent Claim
15 words
Process for the amendment of soils, wherein particles according to claim 1 are incorporated therein.
References Cited (Backward Citations)
US4321301A
Cited
FR2376695A1
Cited
FR2383880A1
Cited
US4135010A
Cited
US4293426A
Cited
EP0002543B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |