US3351571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of natural or synthetic rubber with polyepisulfide
Assignee: Dunlop Rubber Co Ltd
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Filing: 1964-09-23
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Granted: 1967-11-07
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Expires: 1984-09-23
Abstract
No abstract record available.
Inventors
- 👤 Grace Norman Singers
- 👤 Woodhams Raymond Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:23
CPC Classifications
C; C08; C08L; C08L21/00; C08L11/00; C08L7/00; C08L81/00; C08L9/00; C08L9/02; C08L9/06; C08L23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A VULCANIZED ELASTOMERIC COMPOSITION COMPRISING THE SULPHUR VULCANIZATE OF A MIXTURE OF: (A) AN ETHYLENICALLY UNSATURATED COPOLYMER OF AT LEAST ONE SATURATED ALIPHATIC EPISULPHIDE MONOMER AND AN EPISULPHIDE MONOMER CONTAINING AT LEAST ONE ALIPHATIC CARBON-CARBON DOUBLE BOND IN ADDITION TO THE EPISULPHIDE GROUP, THE PROPORTION OF SAID UNSATURATED MONOMER INTHE COPOLYMER BEING FROM 0.1 TO 20 MOLE PERCENT, AND (B) A SULPHUR VULCANIZABLE ELASTOMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND DIOLEFIN POLYMERS-THE AMOUNT OF SAID UNSATURATED EPISULPHIDE COPOLYMER BEING FROM 1 TO 99 PERCENT BY WEIGHT OF THE TOTAL ELASTOMER CONTENT OF THE COMPOSITION.
Claim 2
Dependent Claim
97 words
A VULCANIZED ELASTOMERIC COMPOSITION COMPRISING THE SULPHUR VULCANIZATE OF A MIXTURE OF: (A) AN ETHYLENICALLY UNSATURATED COPOLYMER OF AT LEAST ONE SATURATED ALIPHATIC EPISULPHIDE MONOMER AND AN EPISULPHIDE MONOMER CONTAINING AT LEAST ONE ALIPHATIC CARBON-CARBON DOUBLE BOND IN ADDITION TO THE EPISULPHIDE GROUP, THE PROPORTION OF SAID UNSATURATED MONOMER INTHE COPOLYMER BEING FROM 0.1 TO 20 MOLE PERCENT, AND (B) A SULPHUR VULCANIZABLE ELASTOMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND DIOLEFIN POLYMERS-THE AMOUNT OF SAID UNSATURATED EPISULPHIDE COPOLYMER BEING FROM 1 TO 99 PERCENT BY WEIGHT OF THE TOTAL ELASTOMER CONTENT OF THE COMPOSITION.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |