US3546133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst containing alkyl aluminum dihalide
Assignee: Individual
•
Filing: 1968-03-04
•
Granted: 1970-12-08
•
Expires: 1988-03-04
Abstract
No abstract record available.
Inventors
- 👤 Karl Ziegler
- 👤 Heinz Breil
- 👤 Heinz Martin
- 👤 Erhard Holzkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:19
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/02; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3422082A
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US3156736A
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US3050471A
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GB886368A
Cited
GB917439A
Cited
US3179604A
Cited
US3398209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |