Patent US3833581A successfully refreshed from Google Patents.
US3833581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase substitution fluorination of aromatics with xenon difluoride
Assignee: United States Atomic Energy Commission
•
Filing: 1971-07-23
•
Granted: 1974-09-03
•
Expires: 1991-07-23
Abstract
Abstract THE PROCESS OF PRODUCING A FLUORINE-SUBSTITUTED AROMATIC COMPOUND IN THE VAPOR PHASE WITH XENON DIFLUORIDE MATIC AT A MODERATE TEMPERATURE ON THE ORDER OF ABOUT VAPOR COMPOUND IN THEVAPOR PHASE WITH XENON DIFLUORIDE 200*C. AT A MOLE RATIO OF XENON DIFLUORIDE TO SAID AROMATIC COMPOUND OF NO GREATER THAN 1.
Inventors
- 👤 Kenzie D Mac
- 👤 J Fajer
- 👤 R Smol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:36
CPC Classifications
C; C07; C07B; C07B39/00; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |