US2404033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A cellulose ester composition containing a rosin ester and the method of preparing said rosin ester
Assignee: Heyden Chemical Corp
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Filing: 1943-02-03
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Granted: 1946-07-16
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Expires: 1963-02-03
Abstract
No abstract record available.
Inventors
- 👤 Burrell Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:24
CPC Classifications
C; C09; C09D; C09D101/00; C09D101/08; C09D101/16; C09D101/18; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C09F; C09F1/00
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) | 1949-07-15 | 1950-01-14 | 1950-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-15 | 1954-01-14 | 1954-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-15 | 1958-01-14 | 1958-07-16 | $7700.00 | Window Closed / Lapsed |