US4266370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agricultural covering film or sheet and method for thermal insulation
Assignee: Sekisui Chemical Co Ltd
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Filing: 1979-09-19
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Granted: 1981-05-12
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Expires: 1999-09-19
Abstract
Abstract A resin composition in the form of a covering film or sheet comprising (A) 100 parts by weight of a thermoplastic olefinic resin and (B) about 1 to about 20 parts by weight of an acetal resin; and a method for maintaining an agricultural locus at temperatures suitable for the growth of plants, using above covering film or sheet.
Inventors
- 👤 Yoshiaki Kodera
- 👤 Kiyoyuki Watanabe
- 👤 Takayuki Kusu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:49
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; A; A01; A01G; A01G9/00; A01G9/14; A01G9/1438; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0853; C08L23/10; C08L31/00; C08L31/02; C08L31/04; C08L2207/00; C08L2207/06; C08L2207/062; C08L2207/066; C08L59/00; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
A method for maintaining an agricultural locus at temperatures suitable for the growth of plants, which comprises covering the locus with a covering film or sheet of a resin composition comprising (A) 100 parts by weight of a thermoplastic olefinic resin and (B) about 1 to about 20 parts by weight of an acetal resin.
Claim 2
Independent Claim
55 words
A method for maintaining an agricultural locus at temperatures suitable for the growth of plants, which comprises covering the locus with a covering film or sheet of a resin composition comprising (A) 100 parts by weight of a thermoplastic olefinic resin and (B) about 1 to about 20 parts by weight of an acetal resin.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the resin (A) is selected from ethylene resins, an ethylene vinyl acetate copolymer, and mixtures of these.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the acetal resin (B) is a polyoxymethylene polymer or copolymer.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the acetal resin (B) has a degree of polymerization of about 500 to about 3,500.
Claim 6
Dependent Claim
26 words
The method of claim 3 or 4 wherein the acetal resin (B) is a polyoxymethylene copolymer containing up to about 3% by weight of a comonomer.
References Cited (Backward Citations)
FR1574088A
Cited
JPS5174846A
Cited
US4075784A
Cited
JPS54105187A
Cited
US4134875A
Cited
US4170087A
Cited
US4214034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |