US3235474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic method of producing nitrogen trifluoride
Assignee: Air Products and Chemicals Inc
•
Filing: 1961-10-02
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Granted: 1966-02-15
•
Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr James F Tompkins
- 👤 Emile S J Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:21
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/245
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
THE METHOD OF PRODUCING A GASEOUS MIXTURE CONTAINING NITROGEN TRIFLUORIDE IN THE PRESENCE OF A FUEL MATERIAL WHEREIN EXPLOSION HAZARDS ARE REDUCED COMPRISING THE STEPS OF SUBJECTING A MOLTEN SALT HYDROGEN FLUORIDE AND AMMONIA TO ELECTROLYSIS AND THEREBY EVOLVING A GASEOUS MIXTURE CONTAINING NITROGEN TRIFLUORIDE, DILUTING THE GASEOUS MIXTURE WITH A DILUENT GAS AND THEREBY MAINTAINING THE CONCENTRATION OF THE NITROGEN TRIFLUORIDE IN THE GASEOUS MIXTURE AT LESS THAN ABOUT 9.4 MOL PERCENT AND REPLENISHING THE MOLTEN SALT BY PASS-
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |