Patent US3869422A successfully refreshed from Google Patents.
US3869422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blend of polymers
Assignee: EIDP Inc
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Filing: 1972-12-08
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Granted: 1975-03-04
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Expires: 1992-12-08
Abstract
Abstract A heat-sealable composition containing 40-80 weight percent crystalline copolymers of ethylene and acrylic acid or methacrylic acid wherein the acid is present in the copolymer in amounts of from 5-15 weight percent, said acid being free of neutralizing metal ions; and 20-45 weight percent of an amorphous elastomeric copolymer of ethylene containing 20-60 weight percent propylene and, optionally, up to 10 weight percent of a nonconjugated diene.
Inventors
- 👤 James Wilkinson Dawes
- 👤 Kurt Lothar Seligman
- 👤 Stanley George Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:12
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L2205/00; C08L2205/03; C08L23/06; C08L23/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A WATER-IMPERMEABLE HEAT-SEALABLE THERMOPLASTIC FILM OF A UNIFORM BLEND OF A POLYMERIC COMPOSITION CONSISTING ESSENTIALLY OF: A. 40-80 WEIGHT PERCENT OF A CRYSTALLINE COPOLYMER OF ETHYLENE AND AN A,B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID, OR MIXTURES THEREOF, WHEREIN SAID CARBOXYLIC ACID IS PRESENT IN THE COPOLYMER IN AMOUNTS OF FROM ABOUT 5-15 WEIGHT PERCENT, AND SAID CARBOXYLIC ACID IS FREE OF NUETRALIZING METAL IONS, B. 20-45 WEIGHT PERCENT OF AN AMORPHOUS ELASTOMERIC COPOLYMER OF ETHYLENE CONSISTING 20-60 WEIGHT PERCENT PROPYLENE AND UP TO ABOUT 10 WEIGHT PERCENT OF A NONCONJUGATED DIENE.
Claim 2
Dependent Claim
100 words
A WATER-IMPERMEABLE HEAT-SEALABLE THERMOPLASTIC FILM OF A UNIFORM BLEND OF A POLYMERIC COMPOSITION CONSISTING ESSENTIALLY OF: A. 40-80 WEIGHT PERCENT OF A CRYSTALLINE COPOLYMER OF ETHYLENE AND AN A,B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID, OR MIXTURES THEREOF, WHEREIN SAID CARBOXYLIC ACID IS PRESENT IN THE COPOLYMER IN AMOUNTS OF FROM ABOUT 5-15 WEIGHT PERCENT, AND SAID CARBOXYLIC ACID IS FREE OF NUETRALIZING METAL IONS, B. 20-45 WEIGHT PERCENT OF AN AMORPHOUS ELASTOMERIC COPOLYMER OF ETHYLENE CONSISTING 20-60 WEIGHT PERCENT PROPYLENE AND UP TO ABOUT 10 WEIGHT PERCENT OF A NONCONJUGATED DIENE.
Claim 3
Dependent Claim
12 words
The film of claim 1 wherein the carboxylic acid is methacrylic acid.
Claim 4
Dependent Claim
13 words
The film of claim 2 wherein the nonconjugated diene is 1,4-hexadiene or 5-ethylidene-2-norbornene.
Claim 5
Dependent Claim
17 words
The film of claim 3 wherein up to 20 weight percent of the crystalline copolymer is polyethylene.
Claim 6
Dependent Claim
8 words
The film of claim 2 containing carbon black.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |