Patent US2800389A successfully refreshed from Google Patents.
US2800389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metal fluorides
Assignee: Pennwalt Corp
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Filing: 1953-11-17
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Granted: 1957-07-23
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Expires: 1973-11-17
Abstract
No abstract record available.
Inventors
- 👤 Mockria Isadore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:32
CPC Classifications
C; C01; C01B; C01B9/00; C01B9/08; C01F; C01F7/00; C01F7/48; C01F7/50; C01F7/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE METHOD OF REACTING POTASSIUM FLUORIDE WITH ALUMINUM SULFATE COMPRISING GRINDING TOGETHER THE POTASSIUM FLUORIDE AND ALUMINUM SULTATE TO FORM A FINE POWDERED MIX, COMPACTING THE POWDERED MIX INTO A MASS, CONTAINING THE MASS AT A TEMPERATURE OF APPROXIMATELY 25* C. TO 40* C. AND INITATING A REACTION THROUGH THE APPLICATION OF SLIGHT PRESSURE, WHEREBY SAID REACTION GOES SUBSTANTIALLY TO COMPLETION WITHOUT REQUIRING THE APPLICATION OF HEAT.
Claim 2
Independent Claim
67 words
THE METHOD OF REACTING POTASSIUM FLUORIDE WITH ALUMINUM SULFATE COMPRISING GRINDING TOGETHER THE POTASSIUM FLUORIDE AND ALUMINUM SULTATE TO FORM A FINE POWDERED MIX, COMPACTING THE POWDERED MIX INTO A MASS, CONTAINING THE MASS AT A TEMPERATURE OF APPROXIMATELY 25* C. TO 40* C. AND INITATING A REACTION THROUGH THE APPLICATION OF SLIGHT PRESSURE, WHEREBY SAID REACTION GOES SUBSTANTIALLY TO COMPLETION WITHOUT REQUIRING THE APPLICATION OF HEAT.
References Cited (Backward Citations)
DE35212C
Cited
GB190819738A
Cited
GB117901A
Cited
US2376895A
Cited
US2387203A
Cited
US2653856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |