Patent US2641022A successfully refreshed from Google Patents.
US2641022A
Expired / Lapsed
US
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Method of manufacturing plastic film
Assignee: Extruders Inc
•
Filing: 1950-02-21
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Granted: 1953-06-09
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Expires: 1970-02-21
Abstract
No abstract record available.
Inventors
- 👤 Richard G Kress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:09
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/28; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29C48/88; B29C48/90; B29C48/901; B29C2793/00; B29C2793/0063; B29C48/001; B29C48/0018; B29C48/0019; B29C48/0022; B29C48/885; B29C48/903; B29C48/911; B29C48/9115; B29C48/912; B29C48/9135; B29C48/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |