Patent US2456408A successfully refreshed from Google Patents.
US2456408A
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Synthetic drying compositions
Assignee: Celanese Coatings Co
•
Filing: 1943-09-14
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Granted: 1948-12-14
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Expires: 1963-09-14
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/27; C07D301/28; B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C09; C09D; C09D163/00; C09F; C09F9/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |