US3673134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agricultural mulch
Assignee: EIDP Inc
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Filing: 1970-08-03
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Granted: 1972-06-27
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Expires: 1990-08-03
Abstract
Abstract A film plastic in nature for use as an agricultural mulch. The film is a blend of an ethylene polymer, a substantially amorphous ethylene/propylene copolymer, a natural rubber and a paraffin wax. The films are sufficiently tough and flexible to allow handling and laying out on a planted soil surface, yet they readily rupture under the pressure of a growing seedling to allow plant penetration. The films degrade during a growing season to the point that they can be readily disposed of by plowing and/or disking into the ground.
Inventors
- 👤 Bernard F Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:42
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/30; A01G13/32; A01G13/33; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/16; C08L2205/00; C08L2205/03; C08L2205/035; C08L7/00; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
25 words
A composition of claim 1 wherein the ethylene polymer is branched polyethylene having a density not greater than 0.93 gram per cc. at 25* C.
Claim 2
Dependent Claim
29 words
A composition of claim 1 wherein the ethylene/propylene copolymer is a terpolymer of 30-70 weight percent ethylene, 60-20 weight percent propylene and 0-10 weight percent of a nonconjugated diene.
Claim 3
Dependent Claim
15 words
A composition of claim 3 wherein the nonconjugated diene is 1-10 weight percent of 1,4-hexadiene.
Claim 4
Dependent Claim
13 words
A composition of claim 1 wherein the natural rubber is smoked sheet grade.
Claim 5
Dependent Claim
48 words
A composition of claim 1 wherein the ethylene polymer is a branched polyethylene having a density not greater than 0.93 gram per cubic centimeter at 25* C., the substantially amorphous ethylene/propylene copolymer is a terpolymer of ethylene, propylene and 1,4-hexadiene and the natural rubber is smoked sheet grade.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |