Patent US2482008A successfully refreshed from Google Patents.
US2482008A
Expired / Lapsed
US
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Process for polymerization of propylene
Assignee: Sharples Chemicals Inc
•
Filing: 1944-09-02
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Granted: 1949-09-13
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Expires: 1964-09-02
Abstract
No abstract record available.
Inventors
- 👤 Eugene V Kleber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:51
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2034575A
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US2198937A
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US2180361A
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US2329714A
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US2365426A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |