Patent US3341281A successfully refreshed from Google Patents.
US3341281A
Expired / Lapsed
US
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Fluorination catalyst pellets
Assignee: Dow Chemical Co
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Filing: 1965-01-22
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Granted: 1967-09-12
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Expires: 1985-01-22
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Davis
- 👤 Keith A Allswede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:08
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/507
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A PELLETED INTIMATE MIXTURE OF 1-3 PARTS BY WEIGHT OF GRAPHITE, 1-10 PARTS OF STARCH, AND 100 PARTS OF A FLUORIDE COMPOSITION CONSISTING ESSENTIALLY OF ONE PART OF CRF3 AS THE POLYHYDRATED SALT AND 0-4 PARTS BY WEIGHT OF ALUMINUM FLUORIDE.
Claim 2
Dependent Claim
41 words
A PELLETED INTIMATE MIXTURE OF 1-3 PARTS BY WEIGHT OF GRAPHITE, 1-10 PARTS OF STARCH, AND 100 PARTS OF A FLUORIDE COMPOSITION CONSISTING ESSENTIALLY OF ONE PART OF CRF3 AS THE POLYHYDRATED SALT AND 0-4 PARTS BY WEIGHT OF ALUMINUM FLUORIDE.
Claim 3
Dependent Claim
75 words
A PROCESS FOR MAKING AN IMPROVED CHROMIUM OXYFLUORINATION CATALYST WHICH COMPRISES FORMING AN INTIMATE MIXTURE OF 1-3 PARTS BY WEIGHT OF GRAPHITE, 1-10 PARTS OF STARCH, AND 100 PARTS OF A FLUORIDE COMPOSITION CONSISTING ESSENTIALLY OF ONE PART OF CRF3 AS THE POLYHYDRATED SALT AND 0-4 PARTS BY WEIGHT OF ALUMINUM FLUORIDE, COMPRESSING SAID MIXTURE INTO PELLETS, AND HEATING SAID PELLETS IN AN OXYGEN-CONTAINING GAS AT 350-750*C. UNTIL THEY ARE SUBSTANTIALLY FREE OF CARBONACEOUS MATERIAL.
Claim 4
Dependent Claim
75 words
A PROCESS FOR MAKING AN IMPROVED CHROMIUM OXYFLUORINATION CATALYST WHICH COMPRISES FORMING AN INTIMATE MIXTURE OF 1-3 PARTS BY WEIGHT OF GRAPHITE, 1-10 PARTS OF STARCH, AND 100 PARTS OF A FLUORIDE COMPOSITION CONSISTING ESSENTIALLY OF ONE PART OF CRF3 AS THE POLYHYDRATED SALT AND 0-4 PARTS BY WEIGHT OF ALUMINUM FLUORIDE, COMPRESSING SAID MIXTURE INTO PELLETS, AND HEATING SAID PELLETS IN AN OXYGEN-CONTAINING GAS AT 350-750*C. UNTIL THEY ARE SUBSTANTIALLY FREE OF CARBONACEOUS MATERIAL.
References Cited (Backward Citations)
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US2739927A
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US2745886A
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US3002934A
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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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |