US2653856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of beryllium fluoride
Assignee: Individual
•
Filing: 1948-01-23
•
Granted: 1953-09-29
•
Expires: 1968-01-23
Abstract
No abstract record available.
Inventors
- 👤 Barr Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:46
CPC Classifications
C; C01; C01F; C01F3/00; C01F3/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
THE PROCESS FOR THE PREPARATION OF SOLID BERYLLIUM FLUORIDE WHICH COMPRISES THE STEPS FORMING A MIXTURE OF BERYLLIUM AMMONIUM FLOURIDE AND BERYLLIUM OXIDE IN APPROXIMATELY EQUIMOLECULAR PROPORTIONS WITH THE FORMER COMPOUND IN SMALL EXCESS, HEATING THE MIXTURE TO BRING ABOUT REACTION BETWEEN THE COMPOUNDS WITH THE FORMATION OF BERYLLIUM FLUORIDE AND AMMONIA, DISCONTINUING THE HEATING WHEN AMMONIA CEASES TO BE EVOLVED AND RECOVERING THE SOLID BERYLLIUM FLUORIDE PRODUCED.
References Cited (Backward Citations)
GB485711A
Cited
US2233465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |