US3812618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seed-foam-fabric composite
Assignee: WR Grace and Co
•
Filing: 1973-03-08
•
Granted: 1974-05-28
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Expires: 1993-03-08
Abstract
Abstract The invention disclosed provides a seed-foam-fabric composite which may be readily applied over a ground area for supporting and protecting seeds during germination.
Inventors
- 👤 L Wood
- 👤 C Kehr
- 👤 K Frisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; A; A01; A01C; A01C1/00; A01C1/04; A01C1/044; A01C1/046; A01G; A01G24/00; 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; Y10S428/00; Y10S428/913; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
58 words
The method of claim 1 wherein the capped polyoxyethylene polyol is present in the first component in an amount from about 3% by weight up to 100% by weight, and wherein a capped polyoxyethylene polyol having a terminal member with an isocyanate functionality of two is present in an amount from 0% up to about 97% by weight.
Claim 2
Dependent Claim
37 words
The method of claim 1 wherein the polyoxyethylene polyol moiety of the isocyanate capped member has a weight average molecular weight of about 200 to about 20,000, and a hydroxyl functionality of about 2 to about 8.
Claim 3
Dependent Claim
17 words
The method of claim 3 wherein the weight average molecular weight is about 600 to about 6,000.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the ratio of moles H2O/moles NCO groups is from about 20 to about 200.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein the fabric is biodegradable.
Claim 6
Dependent Claim
19 words
The methoD of claim 1 wherein the fabric is selected from the group consisting of paper, plastic and cloth.
Claim 7
Independent Claim
83 words
A method for preparing improved crosslinked hydrophilic foam seed-fabric composite, said method comprising depositing a multiple number of islands of a first component comprising isocyanate capped polyoxyethylene polyol having a reaction functionality equal to about two onto a fabric substrate, and reacting the islands with a second component comprising aqueous reactant, seeds, and a crosslinking agent having a reaction functionality greater than 2, the ratio of moles H2O/moles NCO groups being about 6.5 to about 390 in said second and first components respectively.
Claim 8
Dependent Claim
16 words
The method of claim 8 wherein the crosslinking agent of the third component is a polyol.
Claim 9
Dependent Claim
16 words
The method of claim 8 wherein the crosslinking agent of the third component is a polythiol.
Claim 10
Dependent Claim
16 words
The method of claim 8 wherein the crosslinking agent of the third component is a polyisocyanate.
Claim 11
Dependent Claim
16 words
The method of claim 8 wherein the crosslinking agent of the third component is a polyamine.
Claim 12
Dependent Claim
36 words
The method of claim 8 wherein the polyoxyethylene polyol moiety of the isocyanate capped member has an average molecular weight of about 200 to about 20,000, and a hydroxyl functionality of about 2 to about 8.
Claim 13
Dependent Claim
16 words
The method of claim 8 wherein the weight average molecular weight is about 600 to 6,000.
Claim 14
Dependent Claim
20 words
The method of claim 8 wherein the ratio of moles H2O/moles NCO groups is from about 20 to about 200.
Claim 15
Dependent Claim
10 words
The method of claim 8 wherein the fabric is biodegradable.
Claim 16
Dependent Claim
19 words
The method of claim 8, wherein the fabric is selected from the group consisting of paper, plastic and cloth.
Claim 17
Independent Claim
83 words
A method for preparing a crosslinked hydrophilic foam-seed-fabric composite, comprising depositing multiple, spaced islands of isocyanate capped polyoxyethylene polyol having a reaction functionality greater than two onto a fabric support layer, adding an aqueous reactant to said islands, the ratio of moles H2O/moles NCO groups being about 6.5 to about 390 in said polyol and reactant, respectively, whereupon said islands begin to foam, and prior to the completion of the foaming, adding seeds to said islands, whereby each foamed island contains a seed.
Claim 18
Independent Claim
103 words
A method for preparing a crosslinked hydrophilic foam-seed-fabric composite, comprising depositing a multiple number of islands of a first component comprising isocyanate capped polyoxyethylene polyol having a reaction functionality equal to about two onto a fabric support layer, and reacting the islands with an aqueous component and 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 polyol and aqueous component, respectively, whereupon said islands begin to foam, and prior to the completion of the foaming, adding seeds to said islands, whereby each foamed island contains a seed.
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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 |