Patent US2579815A successfully refreshed from Google Patents.
US2579815A
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US
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Extrusion apparatus
Assignee: Celanese Corp
•
Filing: 1948-11-27
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Granted: 1951-12-25
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Expires: 1968-11-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Gialanella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/03; B29C48/06; B29C48/09; B29C48/12; Y; Y10; Y10S; Y10S425/00; Y10S425/115
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1607623A
Cited
US2047554A
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US2307034A
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US2365374A
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US2417165A
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US2519375A
Cited
US2512844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |