US3525781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymers prepared by feeding batch prepolymer into a continuous reactor
Assignee: Phillips Petroleum Co
•
Filing: 1965-05-17
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Granted: 1970-08-25
•
Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Jack S Scoggin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:54
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; Y; Y10; Y10S; Y10S525/00; Y10S525/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3284430A
Cited
US3301921A
Cited
US3378607A
Cited
US3345431A
Cited
US3347955A
Cited
US3454675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |