US3278644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of reduced cold flow comprising a blend of two butadiene homopolymers
Assignee: Phillips Petroleum Co
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Filing: 1961-11-20
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Granted: 1966-10-11
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Robert P Zelinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:13
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08L; C08L9/00; C08K; C08K5/00; C08K5/56; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A RUBBERY PRODUCT COMPRISING (A) POLYBUTADIENE HAVING AN INHERENT VISCOSITY OF 0.75 TO 3, SAID POLYBUTADIENE FORMED BY 85 TO 100 PERCENT CIS-1,4-ADDITION, AND (B) POLYBUTADIENE HAVING AN INHERENT VISCOSITY OF 6 TO 20 THE WEIGHT OF (B) BEING 2 TO 40 PERCENT OF THE TOTAL OF (A) AND (B), THE INHERENT VISCOSITY BEING DETERMINED FROM THE VISCOSITY OF A SOLUTION OF 0.1 GRAM OF POLYMER PER 100 MILLILITERS OF TOLUENE AT 25*C.
Claim 2
Dependent Claim
73 words
A RUBBERY PRODUCT COMPRISING (A) POLYBUTADIENE HAVING AN INHERENT VISCOSITY OF 0.75 TO 3, SAID POLYBUTADIENE FORMED BY 85 TO 100 PERCENT CIS-1,4-ADDITION, AND (B) POLYBUTADIENE HAVING AN INHERENT VISCOSITY OF 6 TO 20 THE WEIGHT OF (B) BEING 2 TO 40 PERCENT OF THE TOTAL OF (A) AND (B), THE INHERENT VISCOSITY BEING DETERMINED FROM THE VISCOSITY OF A SOLUTION OF 0.1 GRAM OF POLYMER PER 100 MILLILITERS OF TOLUENE AT 25*C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |