US3812619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horticultural foam structures and method
Assignee: WR Grace and Co
•
Filing: 1972-08-10
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Granted: 1974-05-28
•
Expires: 1992-08-10
Abstract
Abstract The invention disclosed is for horticultural foam structures prepared by reacting an isocyanate capped polyoxyethylene polyol reactant with large amounts of an aqueous reactant containing seeds or the like. Desirably, the aqueous reactant further includes materials useful or necessary for plant growth. The resultant foam structures provide an effective means for protecting dormant seeds as well as means for sustaining seed germination and plant growth.
Inventors
- 👤 K Frisch
- 👤 L Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; A; A01; A01C; A01C1/00; A01C1/04; A01C1/044; A01C1/046; A01G; A01G24/00; A01G24/30; A01G24/40; A01G24/48; B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/326; B29C44/34; B29C44/56; B29C44/5627; B29C44/5654; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G2110/00; C08G2110/0083; C08G2310/00; C08J2375/00; C08J2375/04; C08J2375/08; Y; Y10; Y10S; Y10S521/00; Y10S521/905; Y10S71/00; Y10S71/90; Y10S71/904
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
35 words
The method of claim 1 wherein the polyoxyethylene polyol moiety of the isocyanate capped member has a molecular weight of about 200 to about 20,000, and a hydroxyl functionality of about 2 to about 6.
Claim 2
Dependent Claim
15 words
The method of claim 2 wherein the molecular weight is about 600 to about 6,000.
Claim 3
Independent Claim
82 words
A method for preparing improved horticultural structures of hydrophilic foams having three-dimensional networks, said method comprising, reacting a first component comprising isocyanate capped polyoxyethylene polyol having a reaction functionality equal to about two, a second component comprising aqueous reactant, and a third component comprising a crosslinking agent having a reaction functionality greater than two, the ratio of moles H2O/moles NCO groups being about 6.5 to about 390 in said second and first components respectively, said second component containing seeds and nutrients therefor.
Claim 4
Independent Claim
76 words
A method for preparing horticultural structures of improved crosslinked hydrophilic foams having three-dimensional networks, said method comprising, reacting a first component comprising isocyanate capped polyoxyethylene polyol haviNg a reaction functionality greater than two, with a second component comprising aqueous reactant, the ratio of moles H2O/moles NCO groups being about 6.5 to about 390 in said second and first components respectively, said second component containing horticultural material selected from the group consisting of seeds, bulbs and plants.
Claim 5
Dependent Claim
22 words
The method of claim 5 herein the second component further includes a member of the group consisting of nutrients, fertilizers, and pesticides.
Claim 6
Dependent Claim
25 words
The method of claim 5 wherein said first component is mixed with said second component, after which the mixture is sprayed prior to effecting reaction.
Claim 7
Dependent Claim
23 words
The method of claim 5 herein said first and second components are separately sprayed to effect mixing, after which the mixture is reacted.
Claim 8
Dependent Claim
20 words
The method of claim 5 wherein said reaction is effected during spraying of said first component and said second component.
Claim 9
Dependent Claim
20 words
The method of claim 5 wherein the ratio of moles H2O/moles NCO groups is from about 20 to about 200.
Claim 10
Independent Claim
90 words
A method for preparing improved horticultural structures of hydrophilic foams having three-dimensional networks, said method comprising, reacting a first component comprising isocyanate capped polyoxyethylene polyol having a reaction functionality equal to about two, a second component comprising aqueous reactant, and a third component comprising a crosslinking agent having a reaction functionality greater than two, the ratio of moles H2O/moles NCO groups being about 6.5 to about 390 in said second and first component respectively, said second component containing horticultural material selected from the group consisting of seeds, bulbs and plants.
Claim 11
Dependent Claim
16 words
The method of claim 11 wherein the crosslinking agent of the third component is a polyol.
Claim 12
Dependent Claim
16 words
The method of claim 11 wherein the crosslinking agent of the third component is a polythiol.
Claim 13
Dependent Claim
16 words
The method of claim 11 wherein the crosslinking agent of the third component is a polyisocyanate.
Claim 14
Dependent Claim
18 words
The method of claim 11 wherein the said three components are mixed, sprayed and reacted after being sprayed.
Claim 15
Dependent Claim
19 words
The method of claim 11 wherein the said three components are sprayed, mixed and then reacted after being sprayed.
Claim 16
Dependent Claim
35 words
The method of claim 11 wherein the polyoxyethylene polyol moiety of the isocyanate capped member has a molecular weight of about 200 to about 20,000, and a hydroxyl functionality of about 2 to about 6.
Claim 17
Dependent Claim
15 words
The method of claim 11 wherein the molecular weight is about 600 to about 6,000.
Claim 18
Dependent Claim
20 words
The method of claim 11 wherein the ratio of moles H2O/moles NCO groups is from about 20 to about 200.
Claim 19
Dependent Claim
16 words
The method of claim 11 wherein the crosslinking agent of the third component is a polyamine.
Claim 20
Dependent Claim
22 words
The method of claim 11 wherein the second component further includes a member of the group consisting of nutrients, fertilizers and pesticides.
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |