US3136739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic rubber compositions
Assignee: Dunlop Rubber Co Ltd
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Filing: 1960-05-26
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Granted: 1964-06-09
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Expires: 1980-05-26
Abstract
No abstract record available.
Inventors
- 👤 Adamek Stephen
- 👤 Dudley Edward Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/036; C; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C08K5/00; C08K5/04; C08K5/09; C09; C09D; C09D101/00; C09D101/08; C09D101/26; C09D101/28; C09D101/286; C09D129/00; C09D129/02; C09D129/04; C09D189/00; C09D189/005; D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/52; B41C; B41C1/00; B41C1/10; B41C1/1091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A BLEND OF AN UNCURED BUTYL RUBBER WHICH IS A COPOLYMER OF AN ISO-OLEFINE WITH LESS THAN 5% OF A DIOLEFINE, WITH AN UNCURED OLEFINE COPOLYMER RUBBER WHICH IS A COPOLYMER OF AT LEAST ONE STRAIGHT CHAIN MONOOLEFINE WITH A COMPOUND CONTAINING AT LEAST TWO ETHYLENIC DOUBLE BONDS, IN WHICH BOTH RUBBERS HAVE A DEGREE OF A UNSATURATION BETWEEN 0.75 AND 4 PERCENT, THE RELATIVE PROPORTIONS OF THE BUTYL RUBBER AND THE OLEFINE COPOLYMER RUBBER IN THE BLEND BEING BETWEEN 70:30 AND 40:60, THE BUTYL RUBBER HAVING A MOONEY VISCOSITY BELOW 50 AND THE OLEFINE COPOLYMER RUBBER HAVING A MOONEY VISCOSITY ABOVE 65, AND THE RELATIVE PROPORTIONS OF THE BUTYL RUBBER AND OLEFINE COPOLYMER RUBBER BEING SO CORRELATED WITH THEIR VISCOSITIES THAT THE BLENDS HAS A MOONEY VISCOSITY OF 40-60.
Claim 2
Dependent Claim
130 words
A BLEND OF AN UNCURED BUTYL RUBBER WHICH IS A COPOLYMER OF AN ISO-OLEFINE WITH LESS THAN 5% OF A DIOLEFINE, WITH AN UNCURED OLEFINE COPOLYMER RUBBER WHICH IS A COPOLYMER OF AT LEAST ONE STRAIGHT CHAIN MONOOLEFINE WITH A COMPOUND CONTAINING AT LEAST TWO ETHYLENIC DOUBLE BONDS, IN WHICH BOTH RUBBERS HAVE A DEGREE OF A UNSATURATION BETWEEN 0.75 AND 4 PERCENT, THE RELATIVE PROPORTIONS OF THE BUTYL RUBBER AND THE OLEFINE COPOLYMER RUBBER IN THE BLEND BEING BETWEEN 70:30 AND 40:60, THE BUTYL RUBBER HAVING A MOONEY VISCOSITY BELOW 50 AND THE OLEFINE COPOLYMER RUBBER HAVING A MOONEY VISCOSITY ABOVE 65, AND THE RELATIVE PROPORTIONS OF THE BUTYL RUBBER AND OLEFINE COPOLYMER RUBBER BEING SO CORRELATED WITH THEIR VISCOSITIES THAT THE BLENDS HAS A MOONEY VISCOSITY OF 40-60.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |