US2946827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fluoroform
Assignee: National Smelting Co Ltd
•
Filing: 1957-12-18
•
Granted: 1960-07-26
•
Expires: 1977-12-18
Abstract
No abstract record available.
Inventors
- 👤 Belf Leon Jerzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:27
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF PREPARING FLUOROFORM IN HIGH YIELD, WHICH COMPRISES PASSING A GASEOUS MIXTURE OF CHLOROFORM AND HYDROGEN FLUORIDE AT A TEMPERATURE BETWEEN ABOUT 200*C. AND 400*C. OVER A CATALYST CONSISTING ESSENTIALLY OF ACTIVE CHARCOAL IMPREGNATED WITH FROM ABOUT 10.7% TO 12.7% IRON CHLORIDE, AND THEREAFTER SEPARATINGG THE FLUOROFORM FROM THE REMAINING PRODUCTS.
Claim 2
Independent Claim
53 words
THE METHOD OF PREPARING FLUOROFORM IN HIGH YIELD, WHICH COMPRISES PASSING A GASEOUS MIXTURE OF CHLOROFORM AND HYDROGEN FLUORIDE AT A TEMPERATURE BETWEEN ABOUT 200*C. AND 400*C. OVER A CATALYST CONSISTING ESSENTIALLY OF ACTIVE CHARCOAL IMPREGNATED WITH FROM ABOUT 10.7% TO 12.7% IRON CHLORIDE, AND THEREAFTER SEPARATINGG THE FLUOROFORM FROM THE REMAINING PRODUCTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |