Patent US2425638A successfully refreshed from Google Patents.
US2425638A
Expired / Lapsed
US
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Polymerization of ethylene
Assignee: EIDP Inc
•
Filing: 1944-02-18
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Granted: 1947-08-12
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Expires: 1964-02-18
Abstract
No abstract record available.
Inventors
- 👤 Peterson Merlin Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2074782A
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US2153553A
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US2300566A
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US2334195A
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US2327705A
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US2310961A
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US2325060A
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US2340109A
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US2363836A
Cited
US2378195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |