US1854732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for carrying out chemical reactions
Assignee: Celanese Corp
•
Filing: 1928-04-25
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Granted: 1932-04-19
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Expires: 1948-04-25
Abstract
No abstract record available.
Inventors
- 👤 Charles F Beran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:39
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/80; B01F27/90; B01F27/902; B01F27/9021
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) | 1935-04-19 | 1935-10-19 | 1936-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-19 | 1939-10-19 | 1940-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-19 | 1943-10-19 | 1944-04-19 | $7700.00 | Window Closed / Lapsed |