US2439648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclonite purification
Assignee: Olin Industries Inc
•
Filing: 1944-09-25
•
Granted: 1948-04-13
•
Expires: 1964-09-25
Abstract
No abstract record available.
Inventors
- 👤 Jerome G Burtle
- 👤 Wilfred H Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:50
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0091; C06B25/00; C06B25/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |