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US2020687A
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Apparatus for use in the manufacture of films and foils
Assignee: Celanese Corp
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Filing: 1933-01-11
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Granted: 1935-11-12
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Expires: 1953-01-11
Abstract
No abstract record available.
Inventors
- 👤 Kinsella Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:55
CPC Classifications
B; B05; B05C; B05C1/00; B05C1/04; B05C1/08; B05C1/0826; B05C1/0834; B29; B29D; B29D7/00; B29D7/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-11-11 | 1939-05-13 | 1939-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-11 | 1943-05-13 | 1943-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-11 | 1947-05-13 | 1947-11-12 | $7700.00 | Window Closed / Lapsed |