US3852055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noncaking fertilizers
Assignee: Chevron USA Inc
•
Filing: 1973-01-15
•
Granted: 1974-12-03
•
Expires: 1993-01-15
Abstract
Abstract The caking tendency of fertilizers and other hygroscopic salts during storage is reduced by uniformly incorporating therein a minor amount of a hydroxy-aluminum polymer.
Inventors
- 👤 M Reed
- 👤 W Toland
- 👤 G Hawkes
- 👤 C Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:33
CPC Classifications
C; C05; C05C; C05C1/00; C05C1/02; C05G; C05G3/00; C05G3/30; C05G5/00; C05G5/40
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
16 words
The composition of claim 1 wherein the compositions are macroparticles of greater than 20 Tyler mesh.
Claim 2
Dependent Claim
12 words
The composition of claim 1 wherein the compositions are prills or granules.
Claim 3
Dependent Claim
13 words
The composition of claim 3 wherein the composition is an ammonium salt-containing fertilizer.
Claim 4
Dependent Claim
18 words
The composition of claim 4 wherein the ammonium salt is ammonium nitrate or sulfate, or a mixture thereof.
Claim 5
Dependent Claim
26 words
The composition of claim 5 wherein the composition is coated with from about 1 to 5% by weight, based on total composition, of a moisture-absorptive material.
Claim 6
Dependent Claim
13 words
The composition of claim 4 wherein the composition is an ammonium nitrate-containing fertilizer.
Claim 7
Dependent Claim
31 words
The composition of claim 4 wherein the amount of hydroxy-aluminum polymer is from about 0.1 to 2% by weight and the hydroxyl to aluminum mol ratio is about 1.7 to 2.7.
Claim 8
Dependent Claim
14 words
The composition of claim 8 wherein the hydroxy-aluminum polymer is hydroxy-aluminum nitrate or sulfate.
Claim 9
Dependent Claim
12 words
The composition of claim 8 wherein the hydroxy-aluminum polymer is hydroxy-aluminum chloride.
Claim 10
Dependent Claim
32 words
A particulate ammonium nitrate composition containing 0.1 to 2% by weight, based on weight total composition, of a hydroxy-aluminum polymer having a hydroxyl to aluminum mol ratio of about 2.0 to 2.5.
Claim 11
Independent Claim
44 words
A method of improving the caking resistance of particulate ammonium salt compositions which comprises intimately admixing therewith from about 0.01 to 5% by weight, based on weight total composition, a hydroxy-aluminum polymer having a hydroxyl to aluminum mol ratio of about 1 to 2.9.
Claim 12
Dependent Claim
22 words
The method of claim 12 wherein the composition is a fertilizer granule or prill having a greater than 20 Tyler mesh size.
Claim 13
Dependent Claim
14 words
The method of claim 13 wherein the composition is an ammonium salt-containing composition fertilizer.
Claim 14
Dependent Claim
14 words
The method of claim 14 wherein the ammonium salt is ammonium nitrate or sulfate.
Claim 15
Dependent Claim
30 words
The method of claim 15 wherein the amount of hydroxy-aluminum polymer is from about 0.1 to 2% by weight and the hydroxyl to aluminum ratio is about 1.7 to 2.7.
Claim 16
Dependent Claim
15 words
The method of claim 16 wherein the hydroxy-aluminum polymer is hydroxy-aluminum nitrate, sulfate or chloride.
Claim 17
Dependent Claim
34 words
The method of claim 12 wherein the hydroxy-aluminum polymer is admixed at a pH in the range of about 4 to 5 and the hydroxy to aluminum mol ratio is about 2.0 to 2.5.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |