US3341281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorination catalyst pellets
Assignee: Dow Chemical Co
•
Filing: 1965-01-22
•
Granted: 1967-09-12
•
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 09:37
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)
US2008146A
Cited
US2546903A
Cited
US2739927A
Cited
US2745886A
Cited
US3002934A
Cited
US3079266A
Cited
US3197417A
Cited
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 |