Patent US2865711A successfully refreshed from Google Patents.
US2865711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of hydrogen fluoride
Assignee: International Minerals and Chemical Corp
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Filing: 1956-11-29
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Granted: 1958-12-23
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Expires: 1976-11-29
Abstract
No abstract record available.
Inventors
- 👤 Gunter H Gloss
- 👤 David H Reeve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:07
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF PRODUCING HYDROGEN FLUORIDE WHICH COMPRISES MIXING AMMONIUM BISULFATE WITH A FLUORINECONTAINING AMMONIUM COMPOSITION SELECTED FROM THE GROUP CONSISTING OF AMMONIUM BIFLUORIDE AND AMMONIUM BIFLUORIDE CONTAINING A MINOR AMOUNT OF AMMONIUM FLUORIDE, IN AN AMOUNT EQUIVALENT TO AT LEAST ABOUT 0.9 MOLE OF AMMONIUM BISULFATE PER MOLE OF AMMONIA IN THE FLUROINE-CONTAINING AMMONIUM COMPOSITION, AND MAINTAINING THE REACTANTS AT A TEMPERATURE BETWEEN ABOUT 200* C. AND ABOUT 300*C. TO EVOLVE HYDROGEN FLUORIDE FROM THE REACTION MIXTURE.
Claim 2
Independent Claim
78 words
A METHOD OF PRODUCING HYDROGEN FLUORIDE WHICH COMPRISES MIXING AMMONIUM BISULFATE WITH A FLUORINECONTAINING AMMONIUM COMPOSITION SELECTED FROM THE GROUP CONSISTING OF AMMONIUM BIFLUORIDE AND AMMONIUM BIFLUORIDE CONTAINING A MINOR AMOUNT OF AMMONIUM FLUORIDE, IN AN AMOUNT EQUIVALENT TO AT LEAST ABOUT 0.9 MOLE OF AMMONIUM BISULFATE PER MOLE OF AMMONIA IN THE FLUROINE-CONTAINING AMMONIUM COMPOSITION, AND MAINTAINING THE REACTANTS AT A TEMPERATURE BETWEEN ABOUT 200* C. AND ABOUT 300*C. TO EVOLVE HYDROGEN FLUORIDE FROM THE REACTION MIXTURE.
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |