US3947996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating seeds to control germination and the resultant coated seeds
Assignee: Dow Chemical Co
•
Filing: 1974-01-21
•
Granted: 1976-04-06
•
Expires: 1994-01-21
Abstract
Abstract A plant seed having a controlled germination time is prepared by enveloping the seed in a continuous coating of a film forming composition comprising a water insoluble polymer and polyvinyl alcohol with said coating being of a thickness of from about 0.01 to about 0.15 millimeter and having an oxygen transmission sufficiently high to maintain viability of the seed.
Inventors
- 👤 Harry Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:04
CPC Classifications
A; A01; A01C; A01C1/00; A01C1/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A seed enveloped in a continuous adherent coating to control germination until environmental conditions are satisfactory to continued crop growth wherein said coating consists essentially of a uniform blend of an aqueous latex of insoluble polymer and from 0.5 to 5 weight percent of polyvinyl alcohol wherein said weight percent is based upon the combined weight of polyvinyl alcohol and water insoluble polymer and drying the composition to provide a coating having an oxygen permeability sufficient to permit normal respiration of the seed and from 0.01 to 0.15 mm thickness on said seeds.
Claim 2
Dependent Claim
93 words
A seed enveloped in a continuous adherent coating to control germination until environmental conditions are satisfactory to continued crop growth wherein said coating consists essentially of a uniform blend of an aqueous latex of insoluble polymer and from 0.5 to 5 weight percent of polyvinyl alcohol wherein said weight percent is based upon the combined weight of polyvinyl alcohol and water insoluble polymer and drying the composition to provide a coating having an oxygen permeability sufficient to permit normal respiration of the seed and from 0.01 to 0.15 mm thickness on said seeds.
Claim 3
Dependent Claim
25 words
The seed claimed in claim 1 wherein said water insoluble polymer is an interpolymer of vinylidene chloride and at least one other ethylenically unsaturated comonomer.
Claim 4
Dependent Claim
51 words
The seed claimed in claim 2 wherein said interpolymer is composed of from 70 to 85 weight percent vinylidene chloride, from 15 to 30 weight percent vinyl chloride and from 0 to 10 weight percent of an alkyl acrylate or methacrylate wherein the alkyl contains from 1 to 8 carbon atoms.
Claim 5
Dependent Claim
30 words
The seed claimed in claim 3 wherein said interpolymer is composed of about 75 percent vinylidene chloride, about 20 weight percent vinyl chloride and about 5 weight percent ethyl acrylate.
Claim 6
Dependent Claim
96 words
A process for the preparation of coated seeds which comprises depositing on the surface of the seeds a thin film of a coating composition consisting essentially of a uniform blend of an aqueous latex of a water insoluble polymer and from 0.5 to 5 weight percent of polyvinyl alcohol wherein said weight percent is based upon the combined weight of polyvinyl alcohol and water insoluble polymer and drying the composition to provide a coating having an oxygen permeability sufficient to permit normal respiration of the seed and from 0.01 to 0.15 mm thickness on said seeds.
Claim 7
Dependent Claim
96 words
A process for the preparation of coated seeds which comprises depositing on the surface of the seeds a thin film of a coating composition consisting essentially of a uniform blend of an aqueous latex of a water insoluble polymer and from 0.5 to 5 weight percent of polyvinyl alcohol wherein said weight percent is based upon the combined weight of polyvinyl alcohol and water insoluble polymer and drying the composition to provide a coating having an oxygen permeability sufficient to permit normal respiration of the seed and from 0.01 to 0.15 mm thickness on said seeds.
Claim 8
Dependent Claim
15 words
The process of claim 5 wherein said water insoluble polymer is a vinylidene chloride polymer.
Claim 9
Dependent Claim
52 words
The process claimed in claim 6 wherein said interpolymer is composed of from 70 to 85 weight percent vinylidene chloride, from 15 to 30 weight percent vinyl chloride and from 0 to 10 weight percent of an alkyl acrylate or methacrylate wherein the alkyl group contains from 1 to 8 carbon atoms.
Claim 10
Dependent Claim
31 words
The process of claim 7 wherein said vinylidene chloride polymer is an interpolymer of about 75 weight percent vinylidene chloride, about 20 weight percent vinyl chloride and 5 weight percent ethylacrylate.
References Cited (Backward Citations)
US3045394A
Cited
US3545129A
Cited
US3598565A
Cited
US3698133A
Cited
US3703404A
Cited
US3803761A
Cited
US3808740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |