US4618442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plant cryoprotection
Assignee: SAINT THOMAS FUND PO BOX 1089 VERO BEACH FL 32960 A SUBCHAPTER S Corp OF FL
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Filing: 1985-10-07
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Granted: 1986-10-21
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Expires: 2005-10-07
Abstract
Abstract Protection of plants against freeze damage by treatment with about 0.05 to about 2.5 wt. % aqueous solution of water soluble nonionic surface active polyoxyethylenated polyoxypropylene block copolymers, optionally also containing urea.
Inventors
- 👤 Robert J. Geary
- 👤 Robert J. Geary, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:38
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; A; A01; A01N; A01N25/00; A01N25/30; A01N31/00; A01N31/02; A01N47/00; A01N47/08; A01N47/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
A method of increasing the resistance of plants to damage by freezing conditions comprising applying to the plant surfaces at ambient non-freezing temperatures about 0.25 to about 9 days prior to exposure to such conditions an aqueous solution containing, approximately by weight and as an essential active cryoprotectant component, 0.1% to 2.5% of a water soluble nonionic surface active polyethoxylated polyoxypropylene block copolymer having a molecular weight of about 2,000 to about 7,000 and a molar ratio of propylene oxide:ethylene oxide of about 2.5:1 to about 0.7:1.
Claim 2
Independent Claim
87 words
A method of increasing the resistance of plants to damage by freezing conditions comprising applying to the plant surfaces at ambient non-freezing temperatures about 0.25 to about 9 days prior to exposure to such conditions an aqueous solution containing, approximately by weight and as an essential active cryoprotectant component, 0.1% to 2.5% of a water soluble nonionic surface active polyethoxylated polyoxypropylene block copolymer having a molecular weight of about 2,000 to about 7,000 and a molar ratio of propylene oxide:ethylene oxide of about 2.5:1 to about 0.7:1.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said solution contains about 0.25 wt. % of said copolymer.
Claim 4
Dependent Claim
26 words
A method according to claim 1 wherein said copolymer has a molecular weight of about 4,000 to about 5,000 and said molar ratio is about 1:1.
Claim 5
Dependent Claim
26 words
A method according to claim 1 wherein said solution further contains about 0.5 to about 2 parts of urea per part by weight of said copolymer.
Claim 6
Dependent Claim
66 words
An aqueous plant cryoprotectant solution containing, approximately by weight and as essential cryoprotectant components, 0.05% to 2.5% of a water soluble nonionic surface active polyethoxylated polyoxypropylene block copolymer having a molecular weight of about 2,000 to about 7,000 and a molar ratio of propylene oxide:ethylene oxide of about 2.5:1 to about 0.7:1 and about 0.5 to about 2 parts of urea per part of said copolymer.
Claim 7
Dependent Claim
66 words
An aqueous plant cryoprotectant solution containing, approximately by weight and as essential cryoprotectant components, 0.05% to 2.5% of a water soluble nonionic surface active polyethoxylated polyoxypropylene block copolymer having a molecular weight of about 2,000 to about 7,000 and a molar ratio of propylene oxide:ethylene oxide of about 2.5:1 to about 0.7:1 and about 0.5 to about 2 parts of urea per part of said copolymer.
Claim 8
Dependent Claim
17 words
A solution according to claim 5 containing about 0.1 to about 0.5 wt. % of said copolymer.
Claim 9
Dependent Claim
14 words
A solution according to claim 5 containing about 0.25 wt. % of said copolymer.
Claim 10
Dependent Claim
26 words
A solution according to claim 5 wherein said copolymer has a molecular weight of about 4,000 to about 5,000 and said molar ratio is about 1:1.
Claim 11
Dependent Claim
26 words
A solution according to claim 8 wherein said copolymer has a molecular weight of about 4,000 to about 5,000 and said molar ratio is about 1:1.
Claim 12
Dependent Claim
17 words
A method according to claim 3 wherein said solution contains about 0.25 wt. % of said copolymer.
Claim 13
Dependent Claim
26 words
A method according to claim 10 wherein said solution further contains about 0.5 to about 2 parts of urea per part by weight of said copolymer.
References Cited (Backward Citations)
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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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |