US3754048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diene polymerization
Assignee: Goodrich Corp
•
Filing: 1971-12-27
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Granted: 1973-08-21
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Expires: 1991-12-27
Abstract
Abstract CONJUGATED DIENES ARE REACTED TO POLYMERS (OLIGOMERS) OF LOW MOLECULAR WEIGHT BY CONTACTING WITH A CATALYST SYSTEM CONSISTING OF CHROMIUM (III) ACETYLACETONATE, TRIALKYL ALUMINUM AND A SCHIFF-BASE LIGAND.
Inventors
- 👤 C Wu
- 👤 H Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:33
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2/40; C07C2/403; C07C2/406; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |