US3068216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high molecular weight isotactic polymers from alpha-olefinic hydrocarbons
Assignee: Stamicarbon BV
•
Filing: 1959-09-10
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Granted: 1962-12-11
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Expires: 1979-09-10
Abstract
No abstract record available.
Inventors
- 👤 Vrles Harmen De
- 👤 Jacobus P Schuhmacher
- 👤 Johannes C Soeterbroek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899416A
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GB811633A
Cited
US2893984A
Cited
US2898327A
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US2938000A
Cited
US2951045A
Cited
US2904486A
Cited
US2914515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |