US2875254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for brominating and fluorinating halogenated methanes in a refractory alumina reaction zone
Assignee: EIDP Inc
•
Filing: 1954-01-13
•
Granted: 1959-02-24
•
Expires: 1974-01-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Gradishar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:00
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/263; C07C17/269; C07C17/093; C07C17/10; C07C17/20; C07C17/202; C07C17/204; C07C17/206; C07C17/25
Claims Analysis
Total Claims: 0
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US2729687A
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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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |