US3669898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam protection of plant life
Assignee: Laurentian Concentrates Ltd
•
Filing: 1969-02-07
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Granted: 1972-06-13
•
Expires: 1989-02-07
Abstract
Abstract There is described a foam concentrate from which foams to be used to protect vegetation, for example from frost can be produced. The concentrate comprises a neutralized protein hydrolysate stabilized with specified proportions of iron and lignosulfonate. A method of protecting vegetation using the above foams is also described.
Inventors
- 👤 James W Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/30; A01G13/35; A01N; A01N25/00; A01N25/16; C; C08; C08K; C08K3/00; C08K3/01; C08K3/014; C08K3/30; C08L; C08L89/00; C08L89/04; C08L89/06; C08L97/00; A01G2013/004; C08K2003/3045; C08K2003/3072
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
23 words
A concentrate as claimed in claim 1 in which the source of neutralized protein hydrolysate is blood, horn, feathers or oil seed cake.
Claim 2
Dependent Claim
15 words
A concentrate as claimed in claim 1 in which the ferrous compound is ferrous sulfate.
Claim 3
Dependent Claim
16 words
A concentrate as claimed in claim 1 in which the ratio of protein nitrogen:iron:lignosulfonate is 100:50:250.
Claim 4
Dependent Claim
18 words
A concentrate as claimed in claim 1 in which the lignosulfate is wholly or partially replaced by gelatin.
Claim 5
Dependent Claim
18 words
A concentrate as claimed in claim 5 in which the gelatin is in a partially alkaline hydrolyzed form.
Claim 6
Dependent Claim
20 words
A concentrate as claimed in claim 1 in which the pH of the concentrate is 7 + or - 0.5.
Claim 7
Dependent Claim
86 words
In a method of protecting vegetation comprising applying to the vegetation a foam produced from a diluted foam concentrate, the improvement that comprises using as the concentrate a neutralized protein hydrolysate containing as a stabilizer (a) sufficient water-soluble ferrous salt non-toxic to plants to provide 20 to 100 parts of iron per 100 parts of protein nitrogen and (b) sufficient of a lignosulfonate to provide 100 to 1,000 parts of lignosulfonate, measured as dry salt, per 100 parts of protein nitrogen, all parts being by weight.
Claim 8
Dependent Claim
23 words
A process as claimed in claim 8 in which the applied foam has a thickness in the range of 1 to 3 inches.
Claim 9
Dependent Claim
23 words
A process as claimed in claim 8 in which the diluted concentrate contains between 0.1 percent and 0.3 percent weight w/v protein nitrogen.
Claim 10
Dependent Claim
19 words
A process as claimed in claim 10 in which the diluted protein concentrate contains 0.15 percent w/v protein nitrogen.
Claim 11
Dependent Claim
22 words
A process as claimed in claim 8 in which the foam is produced by blowing a gas through the diluted foam concentrate.
Claim 12
Dependent Claim
13 words
A process as claimed in claim 12 in which the gas is air.
Claim 13
Dependent Claim
21 words
A process as claimed in claim 12 in which 29 parts of gas per 1 part of dilute concentrate are used.
Claim 14
Dependent Claim
16 words
A process as claimed in claim 8 in which the diluted foam concentrate also contains calcium.
Claim 15
Dependent Claim
41 words
A process as claimed in claim 8 in which the structural strength of the foam is such that the foam does not shear when in position on the vegetation under normal spring and fall conditions under which frost may be expected.
Claim 16
Dependent Claim
46 words
A process as claimed in claim 8 in which the foams produced using expansions greater than 25 do not lose by gravitational losses any of the liquid from which they were made, sole losses of liquid being by evaporation or by contact with a bibulous substrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |