US4075784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing the productive yield of crops with polyolefin films
Assignee: Plastiques de Carmaux Scasar SA
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Filing: 1976-05-19
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Granted: 1978-02-28
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Expires: 1996-05-19
Abstract
Abstract A method for increasing the productive yield of crops by heat retention, comprising covering or mulching the crops with a polyolefin film containing from about 1 to 15% based on the weight of the polyolefin of an essentially dehydrated kaolinite containing from about 51 to 57% by weight silica, 40 to 46% by weight alumina and less than 3% impurities.
Inventors
- 👤 Jean-Philippe Pied
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:37
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/30; A01G13/32; A01G13/33; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/36
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
68 words
In a method for increasing the productive yield of crops by covering the crops with plastic film, the improvement comprising retaining heat by covering said crops with a polyolefin film containing from about 1 to 15% based on the weight of the polyolefin of an essentially dehydrated kaolinite containing from about 51 to 57% by weight silica, 40 to 46% by weight alumina and less than 3% impurities.
Claim 2
Dependent Claim
68 words
In a method for increasing the productive yield of crops by covering the crops with plastic film, the improvement comprising retaining heat by covering said crops with a polyolefin film containing from about 1 to 15% based on the weight of the polyolefin of an essentially dehydrated kaolinite containing from about 51 to 57% by weight silica, 40 to 46% by weight alumina and less than 3% impurities.
Claim 3
Dependent Claim
12 words
The method of claim 1, in which the polyolefin is low-density polyethylene.
Claim 4
Dependent Claim
21 words
The method of claim 1, in which the kaolinite is used in an amount of from 3 to 10% by weight.
Claim 5
Dependent Claim
21 words
The method of claim 1, wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, poly-1-butene and copolymers thereof.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein the average particle size of the dehydrated kaolinite is from 1 to 5 microns.
Claim 7
Dependent Claim
31 words
The method of claim 1, further including a minor amount based on the weight of said dehydrated kaolinite of a compound selected from the group consisting of silicates, sulphates and carbonates.
Claim 8
Dependent Claim
26 words
The method of claim 6 in which the silicates are selected from the group consisting of diedellite, pyrophyllite and talc in either hydrated or dehydrated form.
Claim 9
Dependent Claim
16 words
The method of claim 1, wherein said film has a thickness between 20 and 200 microns.
Claim 10
Dependent Claim
64 words
In a method for increasing the productive yield of crops by mulching the crops with plastic film, the improvement comprising mulching said crops with a polyolefin film containing from about 1 to 15% based on the weight of the polyolefin of an essentially dehydrated kaolinite containing from 51 to 57% by weight silica, 40 to 46% by weight alumina and less than 3% impurities.
Claim 11
Dependent Claim
64 words
In a method for increasing the productive yield of crops by mulching the crops with plastic film, the improvement comprising mulching said crops with a polyolefin film containing from about 1 to 15% based on the weight of the polyolefin of an essentially dehydrated kaolinite containing from 51 to 57% by weight silica, 40 to 46% by weight alumina and less than 3% impurities.
Claim 12
Dependent Claim
12 words
The method of claim 9, in which the polyolefin is low-density polyethylene.
Claim 13
Dependent Claim
21 words
The method of claim 9, in which the kaolinite is used in an amount of from 3 to 10% by weight.
Claim 14
Dependent Claim
21 words
The method of claim 9, wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, poly-1-butene and copolymers thereof.
Claim 15
Dependent Claim
20 words
The method of claim 9, wherein the average particle size of the dehydrated kaolinite is from 1 to 5 microns.
Claim 16
Dependent Claim
31 words
The method of claim 9, further including a minor amount based on the weight of said dehydrated kaolinite of a compound selected from the group consisting of silicates, sulphates and carbonates.
Claim 17
Dependent Claim
26 words
The method of claim 14, in which the silicates are selected from the group consisting of diedellite, pyrophyllite and talc in either hydrated or dehydrated form.
Claim 18
Dependent Claim
16 words
The method of claim 9, wherein said film has a thickness between 20 and 200 microns.
References Cited (Backward Citations)
US1930939A
Cited
FR1112597A
Cited
US3088244A
Cited
FR1459539A
Cited
US3353297A
Cited
FR1574088A
Cited
FR2213954A2
Cited
US3857804A
Cited
US3592792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |