US2533133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replacement of hydrogen with fluorine in hydrogen-and halogen-containing organic compounds using lead tetrafluoride
Assignee: Purdue Research Foundation
•
Filing: 1945-07-04
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Granted: 1950-12-05
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Expires: 1965-07-04
Abstract
No abstract record available.
Inventors
- 👤 Earl T Mcbee
- 👤 Richard M Robb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:36
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/013; C07C17/06; C07B; C07B39/00; C07C17/04; C07C17/093; C07C17/10; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD FOR THE PERHALOGENATION OF AN ORGANIC COMPOUND CONTAINING HYDROGEN AND HALOGEN ATTACHED TO CARBON WHICH INCLUDES THE STEP OF REACTING THE VAPOR OF SAID ORGANIC COMPOUND WITH LEAD TETRAFLUORIDE AT A FLUORINATING TEMPERATURE BETWEN ABOUT 20 DEGREES AND ABOUT 500 DEGREES CENTIGRADE FOR A PERIOD OF TIME SUFFICIENT TO ACCOMPLISH REPLACEMENT, WITH FLUORINE, OF ALL HYDROGEN BOUND TO CARBON INT HE STARTING HYDROHALO ORGANIC COMPOUND, WITH RESULTING PERHALOGENTATION OF THE ORGANIC COMPOUND, AND SEPARATING A FLUORINE-CONTAINING PERHALO ORGANIC COMPOUND HAVING THE SAME NUMBER OF CARBON ATOMS IN THE MOLECULE AS THE STARTING COMPOUND FROM THE REACTION PRODUCT.
Claim 2
Independent Claim
99 words
THE METHOD FOR THE PERHALOGENATION OF AN ORGANIC COMPOUND CONTAINING HYDROGEN AND HALOGEN ATTACHED TO CARBON WHICH INCLUDES THE STEP OF REACTING THE VAPOR OF SAID ORGANIC COMPOUND WITH LEAD TETRAFLUORIDE AT A FLUORINATING TEMPERATURE BETWEN ABOUT 20 DEGREES AND ABOUT 500 DEGREES CENTIGRADE FOR A PERIOD OF TIME SUFFICIENT TO ACCOMPLISH REPLACEMENT, WITH FLUORINE, OF ALL HYDROGEN BOUND TO CARBON INT HE STARTING HYDROHALO ORGANIC COMPOUND, WITH RESULTING PERHALOGENTATION OF THE ORGANIC COMPOUND, AND SEPARATING A FLUORINE-CONTAINING PERHALO ORGANIC COMPOUND HAVING THE SAME NUMBER OF CARBON ATOMS IN THE MOLECULE AS THE STARTING COMPOUND FROM THE REACTION PRODUCT.
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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) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |