Patent US2880186A successfully refreshed from Google Patents.
US2880186A
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Compositions containing natural rubber and a carboxyl-containing diene polymer, a film thereof, and method of making same
Assignee: International Latex Corp
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Filing: 1954-04-16
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Granted: 1959-03-31
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Expires: 1974-04-16
Abstract
No abstract record available.
Inventors
- 👤 Harry J Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:14
CPC Classifications
C; C08; C08L; C08L7/00; C08L7/02; A; A21; A21D; A21D2/00; A21D2/08; A21D2/24; A21D2/26; A21D2/264; A21D2/266; C08L21/00; C08L13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A DEPOSITED LATEX FILM HAVING A HIGH RESISTANCE TO TEAR COMPRISING A MIXTURE OF NATURAL RUBBER AND CARBOXYLCONTAINING COPOLYMER PREPARED FROM 1.3 CONJUGATED DIENE, THE CARBOXYL CONTENT OF SAID COPOLYMER BEING FROM ABOUT 0.01 TO 0.1 ACID EQUIVALENT BY WEIGHT OF COMBINED-COOH PER 100 PARTS BY WEIGHT OF DRY COPOLYMER, SAID MIXTURE CONTAINING ABOUT 70 TO 98 PARTS BY WEIGHT OF NATURAL RUBBER AND ABOUT 2 TO 30 PARTS BY WEIGHT OF SAID CARBOXYL-CONTAINING COPOLYMER, AT LEAST A MAJOR PORTION OF THE CARBOXYL GROUPS OF SAID COPOLYMER HAVING BEEN CROSS-LINKED WITH POLYACIDIC CATIONS SELECTED FROM THE GROUP CONSISTING OF CATIONS OF METALS THAT FORM BASIC OXIDES AND OF POLYAMINES, SAID FILM HAVING THE PROPERTY THAT A CUT PROPAGATES AT THE MOST FOR A SHORT DISTANCE AND ALONG A STRAIGHT LINE AT THE END OF WHICH IS A SMALL ARCUATE TEAR TRANSVERSE TO SAID STRAIGHT LINE.
Claim 2
Dependent Claim
145 words
A DEPOSITED LATEX FILM HAVING A HIGH RESISTANCE TO TEAR COMPRISING A MIXTURE OF NATURAL RUBBER AND CARBOXYLCONTAINING COPOLYMER PREPARED FROM 1.3 CONJUGATED DIENE, THE CARBOXYL CONTENT OF SAID COPOLYMER BEING FROM ABOUT 0.01 TO 0.1 ACID EQUIVALENT BY WEIGHT OF COMBINED-COOH PER 100 PARTS BY WEIGHT OF DRY COPOLYMER, SAID MIXTURE CONTAINING ABOUT 70 TO 98 PARTS BY WEIGHT OF NATURAL RUBBER AND ABOUT 2 TO 30 PARTS BY WEIGHT OF SAID CARBOXYL-CONTAINING COPOLYMER, AT LEAST A MAJOR PORTION OF THE CARBOXYL GROUPS OF SAID COPOLYMER HAVING BEEN CROSS-LINKED WITH POLYACIDIC CATIONS SELECTED FROM THE GROUP CONSISTING OF CATIONS OF METALS THAT FORM BASIC OXIDES AND OF POLYAMINES, SAID FILM HAVING THE PROPERTY THAT A CUT PROPAGATES AT THE MOST FOR A SHORT DISTANCE AND ALONG A STRAIGHT LINE AT THE END OF WHICH IS A SMALL ARCUATE TEAR TRANSVERSE TO SAID STRAIGHT LINE.
References Cited (Backward Citations)
US1976679A
Cited
US2138073A
Cited
US2326078A
Cited
US2423766A
Cited
US2399684A
Cited
GB639185A
Cited
US2482931A
Cited
US2656324A
Cited
US2681320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |