US2432405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hydrogen fluoride from hydrocarbons by distillation and partial condensation
Assignee: Universal Oil Products Co
•
Filing: 1943-03-31
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Granted: 1947-12-09
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Expires: 1963-03-31
Abstract
No abstract record available.
Inventors
- 👤 Clarence G Gerhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:55
CPC Classifications
C; C10; C10G; C10G31/00; B; B01; B01J; B01J27/00; B01J27/06; C07; C07C; C07C9/00; C07C9/14; C10G7/00
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) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |