Patent US3830767A successfully refreshed from Google Patents.
US3830767A
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Block copolymer compositions
Assignee: Shell USA Inc
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Filing: 1973-05-02
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Granted: 1974-08-20
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Expires: 1993-05-02
Abstract
Abstract THE BLEEDING OF EXTENDING OILS FROM COMPOSITIONS COMPRISING CERTAIN HYDROGENATED BLOCK COPOLYMERS AND POLYPROPYLENE IS MINIMIZED BY THE ADDITIONAL PRESENCE OF A PETROLEUM HYDROCARBON WAX.
Inventors
- 👤 N Condon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L53/00; C08L53/02; C08L53/025; C08L2205/00; C08L2205/03; C08L2205/035; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |