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US3458491A
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Anionic polymerization and termination process
Assignee: Dow Chemical Co
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Filing: 1967-03-17
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Granted: 1969-07-29
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Expires: 1987-03-17
Abstract
No abstract record available.
Inventors
- 👤 Kent S Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:02
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F2/00; C08F2/38; C08F2/42; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB871611A
Cited
US3050511A
Cited
US3135716A
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US3041312A
Cited
US3139416A
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US3346666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |