Patent US2876497A successfully refreshed from Google Patents.
US2876497A
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Process of melt extruding plastic film
Assignee: Union Carbide Corp
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Filing: 1955-04-14
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Granted: 1959-03-10
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Expires: 1975-04-14
Abstract
No abstract record available.
Inventors
- 👤 Alexander Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:40
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/03; B29C48/07; B29C48/08; B29C48/865; B29C48/001; B29C48/0018; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2328125A
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US2330282A
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US2544763A
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US2702408A
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US2698463A
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US2779053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |