Patent US2919252A successfully refreshed from Google Patents.
US2919252A
Expired / Lapsed
US
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Composition comprising rubber and halogenated poly-1-olefins
Assignee: Phillips Petroleum Co
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Filing: 1957-03-08
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Granted: 1959-12-29
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Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 Peter J Canterino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:18
CPC Classifications
C; C08; C08L; C08L21/00; C08L23/00; C08L23/26; C08L23/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN OZONE RESISTANT RUBBERY COMPOSITION, SAID COMPOSITION COMPRISING (1) 25 TO 75 PARTS BY WEIGHT OF A RUBBER SUBJECT TO OZONE CRACKING SELECTED FROM THE GROU CONSISTING OF NATURAL RUBBER AND SYNTHETIC RUBBERY POLYMERS OF CONJUGATED DIENES WHEREIN THE CONJUGATED DIENE COMPONENT IS PRESENT IN MAJOR AMOUNT AND (2) 75 TO 25 PARTS BY WEIGHT OF A HALOGENATED SOLID POLYMER CONTAINING 10 TO 50 PERCENT BY WEIGHT OF HALOGEN OF AN ALIPHATIC 1-OLEFIN HAVING A MAXIMUM CHAIN LENGHT OF 8 CARBON ATOMS AND NO CHAIN BRANCHING NEARER THE DOUBLE BOND THAN THE 4 POSITION, SAID POLYMER HAVING BEEN PRODUCED IN THE PRESENCE OF A CATALYST COMPRISING CHROMIUM OXIDE INCLUDING HEXAVALENT CHROMIUM, THE AMOUNT OF RUBBER AND HALOGENATED POLYMER BEING SELECTED TO GIVE A TOTAL OF 100 PARTS.
Claim 2
Dependent Claim
127 words
AN OZONE RESISTANT RUBBERY COMPOSITION, SAID COMPOSITION COMPRISING (1) 25 TO 75 PARTS BY WEIGHT OF A RUBBER SUBJECT TO OZONE CRACKING SELECTED FROM THE GROU CONSISTING OF NATURAL RUBBER AND SYNTHETIC RUBBERY POLYMERS OF CONJUGATED DIENES WHEREIN THE CONJUGATED DIENE COMPONENT IS PRESENT IN MAJOR AMOUNT AND (2) 75 TO 25 PARTS BY WEIGHT OF A HALOGENATED SOLID POLYMER CONTAINING 10 TO 50 PERCENT BY WEIGHT OF HALOGEN OF AN ALIPHATIC 1-OLEFIN HAVING A MAXIMUM CHAIN LENGHT OF 8 CARBON ATOMS AND NO CHAIN BRANCHING NEARER THE DOUBLE BOND THAN THE 4 POSITION, SAID POLYMER HAVING BEEN PRODUCED IN THE PRESENCE OF A CATALYST COMPRISING CHROMIUM OXIDE INCLUDING HEXAVALENT CHROMIUM, THE AMOUNT OF RUBBER AND HALOGENATED POLYMER BEING SELECTED TO GIVE A TOTAL OF 100 PARTS.
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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |