Patent US1913478A successfully refreshed from Google Patents.
US1913478A
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US
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Process of working up ethyl cellulose into homogeneous plastic masses
Assignee: IG Farbenindustrie AG
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Filing: 1929-05-20
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Granted: 1933-06-13
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Expires: 1949-05-20
Abstract
No abstract record available.
Inventors
- 👤 Dorr Eduard
- 👤 Leuchs Otto
- 👤 Rosenthal Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:08
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/092; C08J2301/00; C08J2301/08; C08J2301/26; C08J2301/28
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) | 1936-06-12 | 1936-12-12 | 1937-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-12 | 1940-12-12 | 1941-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-12 | 1944-12-12 | 1945-06-13 | $7700.00 | Window Closed / Lapsed |