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US3404133A
Expired / Lapsed
US
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Production of copolymers of alpha, beta-unsaturated aldehydes in a two-step polymerization using two different catalysts
Assignee: Evonik Operations GmbH
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Filing: 1964-07-01
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Granted: 1968-10-01
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Kern Werner
- 👤 Schulz Rolf
- 👤 Passmann Karl Wolfram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:24
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08F; C08F261/00; C08F261/08; C08G2/18; C08G2/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |