Patent US2856256A successfully refreshed from Google Patents.
US4155314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension medium
Assignee: Aqualon Co
•
Filing: 1978-03-20
•
Granted: 1979-05-22
•
Expires: 1998-03-20
Abstract
Abstract Stable suspensions of solid particles are formed by dispersing the particles in a pseudoplastic aqueous medium containing in solution xanthan gum and at least one non-ionic water-soluble polymer, exemplified by guar gum, in proportions providing an unexpectedy high ratio of yield point to plastic viscosity. The medium is especially useful in the planting of seeds which may be pre-germinated.
Inventors
- 👤 William P. O'Callaghan
- 👤 Gianfranco Mecatti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:08
CPC Classifications
A; A01; A01C; A01C7/00; A01C7/004; C; C05; C05G; C05G5/00; C05G5/20; C05G5/27; C09; C09K; C09K23/00; Y; Y10; Y10S; Y10S111/00; Y10S111/915; Y10S111/918
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
31 words
A method of forming a stable suspension of seeds, which comprises dispersing the seeds in a pseudoplastic aqueous medium containing in solution xanthan gum and at least one non-ionic water-soluble polymer.
Claim 2
Independent Claim
31 words
A method of forming a stable suspension of seeds, which comprises dispersing the seeds in a pseudoplastic aqueous medium containing in solution xanthan gum and at least one non-ionic water-soluble polymer.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein the ratio by weight of non-ionic water-soluble polymer to xanthan gum is in the range from 99:1 to 70:30.
Claim 4
Dependent Claim
14 words
A method according to claim 1, wherein the non-ionic water-soluble polymer is guar gum.
Claim 5
Dependent Claim
22 words
A method according to claim 3, wherein the ratio by weight of guar gum to xanthan gum is from 97:3 to 90:10.
Claim 6
Dependent Claim
28 words
A method according to claim 4, wherein the ratio by weight of guar gum to xanthan gum is about 92.5 parts guar gum to 7.5 parts xanthan gum.
Claim 7
Independent Claim
29 words
A method according to any of claims 1 to 5, wherein the total concentration of gum and polymer in the water is from 0.05 to 10 percent by weight.
Claim 8
Independent Claim
29 words
A method according to any of claims 1 to 5, wherein the total concentration of gum and polymer in the water is from 0.3 to 1 percent by weight.
Claim 9
Dependent Claim
22 words
A suspension of dispersed seeds in a pseudoplastic aqueous medium containing in solution xanthan gum and at least one non-ionic water-soluble polymer.
Claim 10
Dependent Claim
22 words
A suspension of dispersed seeds in a pseudoplastic aqueous medium containing in solution xanthan gum and at least one non-ionic water-soluble polymer.
Claim 11
Dependent Claim
25 words
A suspension to claim 8, wherein the ratio by weight of non-ionic water-soluble polymer to xanthan gum is in the range from 99:1 to 70:30.
Claim 12
Dependent Claim
14 words
A suspension according to claim 8 wherein the non-ionic water-soluble polymer is guar gum.
Claim 13
Dependent Claim
22 words
A suspension according to claim 10, wherein the ratio by weight of guar gum to xanthan gum is from 97:3 to 90:10.
Claim 14
Dependent Claim
28 words
A suspension according to claim 11, wherein the ratio by weight of guar gum to xanthan gum is about 92.5 parts guar gum to 7.5 parts xanthan gum.
Claim 15
Dependent Claim
29 words
A suspension according to any of claims 9 to 12, wherein the total concentration of gum and polymer in the water is from 0.05 to 10 percent by weight.
Claim 16
Dependent Claim
29 words
A suspension according to any of claims 9 to 12, wherein the total concentration of gum and polymer in the water is from 0.3 to 1 percent by weight.
Claim 17
Independent Claim
55 words
A method of sowing seeds which comprises dispersing seeds in a biodegradable pseudoplastic aqueous medium containing in solution xanthan gum at least one non-ionic, water-soluble polymer to form a stable suspension of the seeds, and distributing said medium on the land in such a manner as to plant the seeds in or on the soil.
Claim 18
Independent Claim
55 words
A method of sowing seeds which comprises dispersing seeds in a biodegradable pseudoplastic aqueous medium containing in solution xanthan gum at least one non-ionic, water-soluble polymer to form a stable suspension of the seeds, and distributing said medium on the land in such a manner as to plant the seeds in or on the soil.
Claim 19
Dependent Claim
35 words
A method according to claim 15 wherein said polymer is guar gum in a ratio of 90 to 97 parts by weight of guar gum to 10 to 3 parts by weight of xanthan gum.
Claim 20
Dependent Claim
12 words
A method according to claim 16 wherein said seeds are germinated seeds.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |