Patent US2412947A successfully refreshed from Google Patents.
US2412947A
Expired / Lapsed
US
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Dry casting solution of cellulose acetate
Assignee: EIDP Inc
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Filing: 1944-01-19
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Granted: 1946-12-24
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Expires: 1964-01-19
Abstract
No abstract record available.
Inventors
- 👤 Gilbert W Brant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:35
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/66; B29C39/00; B29C39/003; B29K; B29K2001/00; B29K2001/08; B29K2001/12
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) | 1949-12-23 | 1950-06-24 | 1950-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-12-23 | 1954-06-24 | 1954-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-12-23 | 1958-06-24 | 1958-12-24 | $7700.00 | Window Closed / Lapsed |