US4010294A
Expired / Lapsed
US
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Complex phosphates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-04-24
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Granted: 1977-03-01
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Expires: 1995-04-24
Abstract
Abstract Solid water-soluble aluminum phosphate complexes and binder composition which dissolve in water to give solutions containing aluminum ions and orthophosphate ions in such proportions as to provide an Al:P ratio of substantially 1:1 together with the anions of a carboxylic acid or a mineral oxyacid.
Inventors
- 👤 James Derek Birchall
- 👤 John Edward Cassidy
- 👤 Nicholas Rolfe
- 👤 Clifford Granville Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:34
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
62 words
A solid water-soluble aluminium phosphate binder which dissolves in water to form a solution containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or a mineral oxyacid said ions being present in the solution in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion:aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 2
Dependent Claim
62 words
A solid water-soluble aluminium phosphate binder which dissolves in water to form a solution containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or a mineral oxyacid said ions being present in the solution in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion:aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 3
Dependent Claim
26 words
A solid as claimed in claim 1 which when dissolved in water forms a solution containing aluminium and phosphorus in a ratio of 1:0.95 to 1:1.05.
Claim 4
Dependent Claim
15 words
A solid as claimed in claim 1 in which the additional anions are nitrate anions.
Claim 5
Dependent Claim
29 words
A solid as claimed in claim 1 which when dissolved in water forms a solution containing additional anions: aluminium ions in a ratio in the range 0.5:1 to 1.2:1.
Claim 6
Dependent Claim
29 words
A solid as claimed in claim 4 which when dissolved in water forms a solution containing additional anions: aluminium ions in a ratio in the range 0.7:1 to 1.2:1.
Claim 7
Dependent Claim
15 words
An aqueous solution as claimed in claim 5 wherein the additional anions are nitrate anions.
Claim 8
Dependent Claim
53 words
An aqueous solution of the solid of claim 1 containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or mineral oxyacid, the ions being present in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion:aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 9
Dependent Claim
44 words
A solid water-soluble complex phosphate of aluminium, containing Al:P in a ratio of substantially 1:1, and containing chemically-bound water and an additional chemically-bound anion of a carboxylic acid or mineral oxyacid, the additional anion: aluminium ion ratio being in the range 0.5:1 to 4:1.
Claim 10
Dependent Claim
44 words
A solid water-soluble complex phosphate of aluminium, containing Al:P in a ratio of substantially 1:1, and containing chemically-bound water and an additional chemically-bound anion of a carboxylic acid or mineral oxyacid, the additional anion: aluminium ion ratio being in the range 0.5:1 to 4:1.
Claim 11
Dependent Claim
13 words
A complex phosphate as claimed in claim 8 containing a chemically-bound nitrate anion.
Claim 12
Dependent Claim
22 words
A complex phosphate as claimed in claim 8 which contains the additional anion and aluminium in a ratio of 0.7:1 to 1.2:1.
Claim 13
Dependent Claim
62 words
A method of preparing a complex phosphate as claimed in claim 8 which comprises preparing an aqueous solution containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or mineral oxyacid, the ions being present in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion:aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 14
Dependent Claim
20 words
A method as claimed in claim 11 wherein the additional anion:aluminium ion ratio in the solution is at least 0.7:1.
Claim 15
Dependent Claim
18 words
A method as claimed in claim 11 wherein the additional anion:aluminium ion ratio is not greater than 3:1.
Claim 16
Dependent Claim
23 words
A method of preparing a complex phosphate of aluminium as claimed in claim 9 which comprises reacting aluminium phosphate trihydrate with nitrogen dioxide.
Claim 17
Dependent Claim
82 words
A method of coating a surface with an aluminium phosphate according to claim 13 which comprises applying to the surface a solution containing aluminium ions, orthophosphate ions and, additionally, the anions of a carboxylic acid or mineral oxyacid, the ions being present in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion:aluminium ion ratio in the range 0.5:1 to 4:1 and decomposing the solution, by heating to provide a coating of aluminium phosphate on the surface.
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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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |