Patent US2784059A successfully refreshed from Google Patents.
US2784059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anhydrous cupric fluoride
Assignee: Standard Oil Co
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Filing: 1956-03-21
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Granted: 1957-03-05
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Expires: 1976-03-21
Abstract
No abstract record available.
Inventors
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:33
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD FOR PREPARING ANHYDROUS CUPRIC FLUORIDE, WHICH METHOD COMPRISES CONTACTING CURPRIC FLUORIDE HYDRATE, AT LEAST ABOUT 1 MOLE OF BF3 PER MOLE OF SAID HYDRATE, AT LEAST ABOUT 3 MOLES OF LIQUID HF PER MOLE OF SAID HYDRATE AND AT LEAST ABOUT 1 MOLE OF AROMATIC HYDROGEN PER MOLE OF SAID HYDRATE, UNDER ESSENTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE BETWEEN ABOUT -40* C. AND 200* C. AND A PRESSURE AT LEAST SUFFICIENT TO MAINTAIN SAID HF IN THE LIQUID STATE, MAINTAINING THE CONTENTS OF THE REACTION ZONE AT A TEMPERATURE BETWEEN ABOUT 100* C. AND 200* C. AND A PRESSURE SUCH THAT ALL THE HF AND BF3 ARE DISTILLED FROM THE REACTION ZONE AND RECOVERING ANHYDROUS CURPIC FLUORIDE THEREFROM.
Claim 2
Independent Claim
120 words
A METHOD FOR PREPARING ANHYDROUS CUPRIC FLUORIDE, WHICH METHOD COMPRISES CONTACTING CURPRIC FLUORIDE HYDRATE, AT LEAST ABOUT 1 MOLE OF BF3 PER MOLE OF SAID HYDRATE, AT LEAST ABOUT 3 MOLES OF LIQUID HF PER MOLE OF SAID HYDRATE AND AT LEAST ABOUT 1 MOLE OF AROMATIC HYDROGEN PER MOLE OF SAID HYDRATE, UNDER ESSENTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE BETWEEN ABOUT -40* C. AND 200* C. AND A PRESSURE AT LEAST SUFFICIENT TO MAINTAIN SAID HF IN THE LIQUID STATE, MAINTAINING THE CONTENTS OF THE REACTION ZONE AT A TEMPERATURE BETWEEN ABOUT 100* C. AND 200* C. AND A PRESSURE SUCH THAT ALL THE HF AND BF3 ARE DISTILLED FROM THE REACTION ZONE AND RECOVERING ANHYDROUS CURPIC FLUORIDE THEREFROM.
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) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |