Patent US3352944A successfully refreshed from Google Patents.
US3352944A
Expired / Lapsed
US
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Blend of butadiene-styrene block copolymer with cis-polybutadiene
Assignee: Phillips Petroleum Co
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Filing: 1964-01-03
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Granted: 1967-11-14
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Expires: 1984-01-03
Abstract
No abstract record available.
Inventors
- 👤 Robert C Wheat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:24
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; B; B60; B60C; B60C1/00; C08L21/00; C08L53/00; C08L53/02; C08K; C08K3/00; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2688605A
Cited
GB852823A
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GB884974A
Cited
US3060989A
Cited
US3030346A
Cited
FR80692E
Cited
US3265765A
Cited
US3157218A
Cited
US3238173A
Cited
US3251905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |