US2558624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decontaminating products from pyrolysis of chcif2
Assignee: EIDP Inc
•
Filing: 1948-04-21
•
Granted: 1951-06-26
•
Expires: 1968-04-21
Abstract
No abstract record available.
Inventors
- 👤 William S Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:17
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/395
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE PROCESS FOR DECONTAMINATING THE PYROLYSIS PRODUCTS WHICH BOIL IN THE RANGE OF FROM ABOUT -30* C. TO ABOUT 228* C., OBTAINED IN THE PYROLYSIS OF CHCIF2 AT TEMPERATURES OF FROM ABOUT 600* C. TO ABOUT 1000* C., AND WHICH CONTAIN HIGHLY FLUORINATED ORGANIC TOXIC IMPURITIES, WHICH PROCESS COMPRISES MIXING THE PYROLYSIS PRODUCTS IN THE LIQUID PHASE AT TEMPERATURES OF FROM ABOUT -75* C. TO ABOUT 50* C. WITH AT LEAST 3% BY WEIGHT OF ANHYDROUS AMMONIA, AND MAINTAINING THE AMMONIA IN ADMIXTURE WITH THE LIQUID PYROLYSIS PRODUCTS UNDER SUCH CONDITIONS UNTIL REACTION OF THE AMMONIA WITH THE TOXIC IMPURITIES IS SUBSTANTIALLY COMPLETE.
Claim 2
Dependent Claim
103 words
THE PROCESS FOR DECONTAMINATING THE PYROLYSIS PRODUCTS WHICH BOIL IN THE RANGE OF FROM ABOUT -30* C. TO ABOUT 228* C., OBTAINED IN THE PYROLYSIS OF CHCIF2 AT TEMPERATURES OF FROM ABOUT 600* C. TO ABOUT 1000* C., AND WHICH CONTAIN HIGHLY FLUORINATED ORGANIC TOXIC IMPURITIES, WHICH PROCESS COMPRISES MIXING THE PYROLYSIS PRODUCTS IN THE LIQUID PHASE AT TEMPERATURES OF FROM ABOUT -75* C. TO ABOUT 50* C. WITH AT LEAST 3% BY WEIGHT OF ANHYDROUS AMMONIA, AND MAINTAINING THE AMMONIA IN ADMIXTURE WITH THE LIQUID PYROLYSIS PRODUCTS UNDER SUCH CONDITIONS UNTIL REACTION OF THE AMMONIA WITH THE TOXIC IMPURITIES IS SUBSTANTIALLY COMPLETE.
References Cited (Backward Citations)
US2384821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |