Patent US3244773A successfully refreshed from Google Patents.
US3244773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition of trans-polybutadiene to prevent cold flow in cis-polybutadiene
Assignee: Phillips Petroleum Co
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Filing: 1962-09-28
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Granted: 1966-04-05
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:29
CPC Classifications
C; C08; C08L; C08L9/00; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A RUBBERY, UNVULCANIZED COMPOSITION OF MATTER COMPRISING A BLEND OF (1) A CIS-POLYBUTADIENE CONTAINING AT LEAST 85 PERCENT CIS 1,4-ADDITION, AND (2) FROM 0.1 TO ABOUT 5 PARTS BY WEIGHT OF A TRANS-POLYBUTADIENE PER 100 PARTS BY WEIGHT OF SAID CIS-POLYBUTADIENE AND SAID TRANS-POLYBUTADIENE SAID TRANS-POLYBUTADIENE CONTAINING AT LEAST 70 PERCENT TRANS 1,4-ADDITION.
Claim 2
Dependent Claim
53 words
A RUBBERY, UNVULCANIZED COMPOSITION OF MATTER COMPRISING A BLEND OF (1) A CIS-POLYBUTADIENE CONTAINING AT LEAST 85 PERCENT CIS 1,4-ADDITION, AND (2) FROM 0.1 TO ABOUT 5 PARTS BY WEIGHT OF A TRANS-POLYBUTADIENE PER 100 PARTS BY WEIGHT OF SAID CIS-POLYBUTADIENE AND SAID TRANS-POLYBUTADIENE SAID TRANS-POLYBUTADIENE CONTAINING AT LEAST 70 PERCENT TRANS 1,4-ADDITION.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |