Patent US3950159A successfully refreshed from Google Patents.
US3950159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Products and processes
Assignee: Orica Ltd
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Filing: 1973-05-03
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Granted: 1976-04-13
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Expires: 1993-05-03
Abstract
Abstract Compositions of matter suitable for use as a fertilizer and comprising a mixture of water; one or more materials capable of acting as a fertilizer; and at least one agent comprising at least one organic water soluble or water hydratable material capable of thickening said mixture and present in an amount sufficient to convert said mixture to a water resistant gel form.
Inventors
- 👤 Richard Fox
- 👤 Hubert Charles Oldland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:37
CPC Classifications
C; C05; C05G; C05G3/00; C05G5/00; C05G5/20; C05G5/27; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
In a process of preparing a suspension fertilizer mixture by mixing one or more fertilizer components with water in the presence of a suspending agent, the improvement wherein said suspending agent is at least one agent comprising at least one polysaccharidic gum being cross-linked by a substance comprising a redox system and selected from the group consisting of crosslinked galactomannan polysaccharides and crosslinked biopolymeric material which is produced by a process comprising the microbial transformation of carbohydrate material, and wherein said agent constitutes from 0.1% w/w to 5% w/w of said fertilizer mixture.
Claim 2
Dependent Claim
93 words
In a process of preparing a suspension fertilizer mixture by mixing one or more fertilizer components with water in the presence of a suspending agent, the improvement wherein said suspending agent is at least one agent comprising at least one polysaccharidic gum being cross-linked by a substance comprising a redox system and selected from the group consisting of crosslinked galactomannan polysaccharides and crosslinked biopolymeric material which is produced by a process comprising the microbial transformation of carbohydrate material, and wherein said agent constitutes from 0.1% w/w to 5% w/w of said fertilizer mixture.
Claim 3
Dependent Claim
100 words
A composition of matter suitable for use as a water repellent fertilizer and comprising a mixture of water; one or more compounds capable of acting as a fertilizer and at least one polysaccharidic gum selected from the group consisting of crosslinked galactomannan polysaccharides and crosslinked biopolymeric material which is produced by a process comprising the microbial transformation of carbohydrate material, said gum being cross-linked by a substance comprising a redox system and being capable of thickening said mixture and being present in an amount from 0.1 part to 5 parts by weight per 100 parts by weight of said composition.
Claim 4
Dependent Claim
100 words
A composition of matter suitable for use as a water repellent fertilizer and comprising a mixture of water; one or more compounds capable of acting as a fertilizer and at least one polysaccharidic gum selected from the group consisting of crosslinked galactomannan polysaccharides and crosslinked biopolymeric material which is produced by a process comprising the microbial transformation of carbohydrate material, said gum being cross-linked by a substance comprising a redox system and being capable of thickening said mixture and being present in an amount from 0.1 part to 5 parts by weight per 100 parts by weight of said composition.
Claim 5
Dependent Claim
16 words
A composition of matter according to claim 2 wherein the said gum is crosslinked guar gum.
Claim 6
Dependent Claim
30 words
A composition of matter according to claim 2 wherein the said material comprises biopolymeric material prepared from a carbohydrate which has been reacted with a microorganism of the genus Xanthomonas.
Claim 7
Dependent Claim
18 words
A composition of matter according to claim 4 wherein the said microorganism is of the species Xanthomonas campestris.
Claim 8
Dependent Claim
32 words
A composition of matter according to claim 4 wherein said material is present in an amount from 0.1 part to 5 parts by weight per 100 parts by weight of said composition.
Claim 9
Dependent Claim
37 words
A composition of matter according to claim 6 wherein said material comprises in addition a chromic or boron containing compound said compound being present in an amount from 5 to 50% by weight of said biopolymeric material.
Claim 10
Dependent Claim
39 words
A composition of matter according to claim 2 wherein said substance is a water soluble compound present in an amount in the range from 0.005 part to 3 parts by weight per 100 parts by weight of said composition.
Claim 11
Dependent Claim
18 words
A composition of matter according to claim 8 wherein said compound is a dichromate of an alkali metal.
Claim 12
Dependent Claim
68 words
A composition of matter according to claim 2 wherein said redox system has as an oxidizer component an alkali metal dichromate present in an amount from 0.003 to 1 part per 100 parts of said composition and has as a reducer component a water soluble compound derived from iron, zinc, aluminium or antimony present in an amount from 0.001 to 0.3 part per 100 parts of said composition.
Claim 13
Dependent Claim
26 words
A composition of matter according to claim 10 wherein said oxidizer component is sodium dichromate or potassium dichromate and said reducer component is potassium antimony tartrate.
Claim 14
Dependent Claim
14 words
A composition of matter according to claim 2 wherein the said material comprises polyacrylamide.
References Cited (Backward Citations)
US3519413A
Cited
US3829412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |