US2304221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying apparatus
Assignee: Celanese Corp
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Filing: 1940-03-27
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Granted: 1942-12-08
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Expires: 1960-03-27
Abstract
No abstract record available.
Inventors
- 👤 James F Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/04; B01; B01J; B01J2/00; C; C08; C08B; C08B3/00; C08B3/22; F; F26; F26B; F26B17/00; F26B17/24; F26B3/00; F26B3/02; F26B3/10; F26B3/12
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) | 1945-12-07 | 1946-06-08 | 1946-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-07 | 1950-06-08 | 1950-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-07 | 1954-06-08 | 1954-12-08 | $7700.00 | Window Closed / Lapsed |