US3698133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seed having a multiple layered coating and process for preparing same
Assignee: Canadian Patents and Development Ltd
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Filing: 1970-12-21
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Granted: 1972-10-17
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Expires: 1990-12-21
Abstract
Abstract A plant seed having a multiple coating thereon, said multiple coating comprising (1) an inner porous coating which is permeable to water comprising a water insoluble particulate material dispersed throughout a water soluble binder and (2) an applied outer coating of a non-elastomeric material, such as a polymer, said material in film form having a controlled permeability to water and an elongation to breaking less than about 250 percent and said coating being of a thickness such that it will control the water imbibition of the seed to the extent necessary to delay germination until environmental conditions are satisfactory to continued crop growth.
Inventors
- 👤 Kurt Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:02
CPC Classifications
A; A01; A01C; A01C1/00; A01C1/06
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
20 words
The coated seed claimed in claim 1 wherein said solid particulate material is a pulverulent essentially inert water insoluble material.
Claim 2
Dependent Claim
20 words
The coated seed claimed in claim 1 wherein said water soluble binder is sugar, alginates, natural gums, mucilage or molasses.
Claim 3
Dependent Claim
18 words
The coated seed claimed in claim 1 wherein said inner coating also contains a plasticizer for said binder.
Claim 4
Dependent Claim
17 words
The coated seed of claim 1 wherein said outer coating consists essentially of a synthetic polymeric material.
Claim 5
Dependent Claim
16 words
The coated seed of claim 5 wherein said synthetic polymeric material is a vinyl chloride polymer.
Claim 6
Dependent Claim
33 words
The coated seed of claim 6 wherein said vinyl chloride polymer is an interpolymer of at least 50 weight percent vinyl chloride with the remainder of at least one other monoethylenically unsaturated comonomer.
Claim 7
Dependent Claim
12 words
The coated seed of claim 7 wherein said comonomer is vinylidene chloride.
Claim 8
Dependent Claim
34 words
The coated seed of claim 5 wherein said synthetic polymeric material is an interpolymer of at least 50 weight percent of an alkyl acrylate with any remainder of at least one monoethylenically unsaturated comonomer.
Claim 9
Dependent Claim
18 words
The coated seed of claim 9 wherein said interpolymer is composed of butyl acrylate, acrylonitrile and methacrylic acid.
Claim 10
Dependent Claim
16 words
The coated seed of claim 5 wherein said coating of synthetic polymeric material contains a plasticizer.
Claim 11
Dependent Claim
13 words
The coated seed of claim 11 wherein said plasticizer is a dialkyl phthalate.
Claim 12
Dependent Claim
13 words
The coated seed of claim 12 wherein the dialkyl phthalate is diethyl phthalate.
Claim 13
Dependent Claim
120 words
A process for the preparation of coated seeds which comprises: a. depositing on the seeds to be coated a thin film of an inner coating composition comprising a water insoluble solid particulate material and a water soluble binder therefore dispersed in a continuous phase vehicle and drying said composition to give an inner coating of 1.0 to 3.0 millimeter thickness on said seeds, and b. depositing on the dried inner coating in step (a) of the seeds a thin film of an outer coating composition comprising a film forming natural or synthetic polymer material dispersed in an aqueous continuous phase vehicle and drying said composition to provide an outer coating of from 0.05 to 0.10 millimeter thickness on said seeds.
Claim 14
Dependent Claim
15 words
The process of claim 14 wherein said film forming material is a synthetic polymeric material.
Claim 15
Dependent Claim
19 words
The process of claim 15 wherein the outer coating composition is an aqueous latex of said synthetic polymeric material.
Claim 16
Dependent Claim
14 words
The process of claim 16 wherein said synthetic polymeric material is vinyl chloride polymer.
Claim 17
Dependent Claim
32 words
The process of claim 17 wherein said vinyl chloride polymer is an interpolymer of at least 50 weight percent vinyl chloride with the remainder of at least one other monoethylenically unsaturated comonomer.
Claim 18
Dependent Claim
11 words
The process of claim 18 wherein said comonomer is vinylidene chloride.
Claim 19
Dependent Claim
34 words
The process of claim 15 wherein said synthetic polymeric material is an interpolymer of at least 50 weight per cent of an alkyl acrylate with any remainder of at least one monoethylenically unsaturated comonomer.
Claim 20
Dependent Claim
15 words
The process of claim 15 wherein said coating of synthetic polymeric material contains a plasticizer.
Claim 21
Dependent Claim
12 words
The process of claim 21 wherein said plasticizer is a dialkyl phthalate.
Claim 22
Dependent Claim
12 words
The process of claim 22 wherein the dialkyl phthalate is diethyl phthalate.
Claim 23
Dependent Claim
19 words
The process of claim 14 wherein said inner coating composition comprises the coating ingredients dispersed in an aqueous vehicle.
Claim 24
Dependent Claim
35 words
The process of claim 14 wherein each of the coatings of steps (a) and (b) consists of the deposition of a plurality of thin successively applied coatings of a number to attain the said thickness.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |