US2767227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinating halo-fluorocarbons with hydrogen fluoride and aluminum fluoride
Assignee: Honeywell International Inc
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Filing: 1952-10-16
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Granted: 1956-10-16
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Expires: 1972-10-16
Abstract
No abstract record available.
Inventors
- 👤 John D Calfee
- 👤 Charles B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:22
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE PROCESS OF CONTACTING A GASEOUS MATERIAL COMPRISING CH3CCLF2, AT TEMPERATURE IN THE APPROXIMATE RANGE OF 270-360* C., WITH SUBSTANTIALLY ANHYDROUS ALUMINUM FLUORIDE CATALYST, HAVING CRYSTALLITE SIZE BELOW ABOUT 500 ANGSTROM UNITS RADIUS AND HAVING BEEN DERIVED BY REACTION OF ALUMINUM CHLORIDE AND HF, FOR A PERIOD IN THE APPROXIMATE RANGE OF 4-70 SECONDS, TO THEREBY FORM CH3CF3 AND A LESER AMOUNT BY WEIGHT OF CH2=CCL2.
Claim 2
Dependent Claim
66 words
THE PROCESS OF CONTACTING A GASEOUS MATERIAL COMPRISING CH3CCLF2, AT TEMPERATURE IN THE APPROXIMATE RANGE OF 270-360* C., WITH SUBSTANTIALLY ANHYDROUS ALUMINUM FLUORIDE CATALYST, HAVING CRYSTALLITE SIZE BELOW ABOUT 500 ANGSTROM UNITS RADIUS AND HAVING BEEN DERIVED BY REACTION OF ALUMINUM CHLORIDE AND HF, FOR A PERIOD IN THE APPROXIMATE RANGE OF 4-70 SECONDS, TO THEREBY FORM CH3CF3 AND A LESER AMOUNT BY WEIGHT OF CH2=CCL2.
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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |