Patent US2451768A successfully refreshed from Google Patents.
US2451768A
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US
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Regenerated cellulose film manufacture
Assignee: EIDP Inc
•
Filing: 1945-03-13
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Granted: 1948-10-19
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Expires: 1965-03-13
Abstract
No abstract record available.
Inventors
- 👤 Nichols James Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:23
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/22; C08L1/24; C08J; C08J5/00; C08J5/18; C08J2301/00; C08J2301/08; C08J2301/22; C08J2301/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US791385A
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GB155211A
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US1357206A
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US1576531A
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US1745247A
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US1864244A
Cited
US1961316A
Cited
US2028296A
Cited
GB412798A
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US2284028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |