US3920436A
Expired / Lapsed
US
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Artificial protective environment for plants
Assignee: 3M Co
•
Filing: 1972-08-07
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Granted: 1975-11-18
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Expires: 1992-08-07
Abstract
Abstract Plants are contacted with a fluid agent comprising a hydrophilic urethane prepolymer which is then cured in the presence of water to form a thin discontinuous coating of a water-insoluble, hydrophilic polyurethane-polyurea polymer, thereby providing an artificial protective environment for the plant or portion thereof contacted, which is not detrimental to germination or growth. Agrichemicals such as herbicides, growth promoters, insecticides, or other additives can be included as desired for specific plant growth, seeds, or conditions.
Inventors
- 👤 Edward W Janssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; A; A01; A01N; A01N25/00; A01N25/24; C08G18/08; C08G18/10; C08G2310/00; Y; Y10; Y10S; Y10S47/00; Y10S47/09
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
A METHOD FOR PROVIDING AN ARTIFICIAL PROTECTIVE ENVIRONMENT FOR A PLANT OR PORTION THEREOF COMPRISING CONTACTING SAID PLANT OR PORTION THEREOF WITH A FLUID AGENT COMPRISING A HYDROPHILIC URETHANE PREPOLYMER OF THE FORMULA SPP Y1((RO)O - Y2(NCO)P)Z
Claim 2
Independent Claim
37 words
A METHOD FOR PROVIDING AN ARTIFICIAL PROTECTIVE ENVIRONMENT FOR A PLANT OR PORTION THEREOF COMPRISING CONTACTING SAID PLANT OR PORTION THEREOF WITH A FLUID AGENT COMPRISING A HYDROPHILIC URETHANE PREPOLYMER OF THE FORMULA SPP Y1((RO)O - Y2(NCO)P)Z
Claim 3
Dependent Claim
12 words
The method according to claim 1, wherein said contacting is by spraying.
Claim 4
Dependent Claim
12 words
The method according to claim 1, wherein said plant is a seed.
Claim 5
Dependent Claim
14 words
The method according to claim 1, wherein said fluid agent also contains an agrichemical.
Claim 6
Dependent Claim
12 words
The method according to claim 4, wherein said agrichemical is a herbicide.
Claim 7
Independent Claim
33 words
A method for providing an artiFicial protective environment for a plant or portion thereof comprising contacting said plant or portion thereof with a fluid agent comprising a hydrophilic urethane prepolymer of the formula
Claim 8
Independent Claim
33 words
A method for providing an artiFicial protective environment for a plant or portion thereof comprising contacting said plant or portion thereof with a fluid agent comprising a hydrophilic urethane prepolymer of the formula
Claim 9
Dependent Claim
12 words
The method according to claim 6, wherein said contacting is by spraying.
Claim 10
Dependent Claim
12 words
The method according to claim 6, wherein said plant is a seed.
Claim 11
Dependent Claim
14 words
The method according to claim 6, wherein said fluid agent also contains an agrichemical.
Claim 12
Dependent Claim
12 words
The method according to claim 9, wherein said agrichemical is a herbicide.
Claim 13
Dependent Claim
121 words
An article comprising a plant having a coating on at least a portion thereof of a thin, discontinuous water-insoluble, hydrophilic polyurethanepolyurea polymer, said polymer comprised of the reaction product of water and a hydrophilic urethane prepolymer said prepolymer having the formula Y1((RO)o -Y2(NCO)p)z where Y1 is an active hydrogen-free residue of a compound having a plurality of active hydrogen atoms, (RO)o is a hydrophilic polyoxyalkylene chain having a plurality of oxyethylene units, o is the number of oxyalkylene units in said chain, Y2 is an organic linkage bonding said chain to the isocyanate moieties shown in the formula, p is 1 to 5, and z is equal to the number of hydrogen atoms in the compound from which Y2 is derived.
Claim 14
Dependent Claim
121 words
An article comprising a plant having a coating on at least a portion thereof of a thin, discontinuous water-insoluble, hydrophilic polyurethanepolyurea polymer, said polymer comprised of the reaction product of water and a hydrophilic urethane prepolymer said prepolymer having the formula Y1((RO)o -Y2(NCO)p)z where Y1 is an active hydrogen-free residue of a compound having a plurality of active hydrogen atoms, (RO)o is a hydrophilic polyoxyalkylene chain having a plurality of oxyethylene units, o is the number of oxyalkylene units in said chain, Y2 is an organic linkage bonding said chain to the isocyanate moieties shown in the formula, p is 1 to 5, and z is equal to the number of hydrogen atoms in the compound from which Y2 is derived.
Claim 15
Dependent Claim
12 words
The article of claim 11 wherein said coating further includes an agrichemical.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |