US2852574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of tetrafluoroethylene
Assignee: EIDP Inc
•
Filing: 1955-06-15
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Granted: 1958-09-16
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Expires: 1975-06-15
Abstract
No abstract record available.
Inventors
- 👤 Denison Jack Thomas
- 👤 Edlin Frank Edward
- 👤 Whipple George Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:51
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/007; B; B01; B01J; B01J15/00; B01J19/00; B01J19/08; B01J19/087; B01J19/088; B01J8/00; B01J8/18; B01J8/24; B01J8/245; C07C17/26; C07C17/263; C07C17/269; B01J2219/00; B01J2219/08; B01J2219/0894; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE PROCESS OF SYNTHESIZING TETRAFLUOROETHYLENE COMPRISING PYROLYZING A FLUORINE COMPOUND, CAPABLE OF DECOMPOSITION AT A TEMPERATURE ABOVE 1700*C., AT A TEMPERATURE OF AT LEAST 1700*C. AND THEREAFTER CONTACTING THE PYROLYZED GASEOUS PRODUCT WHILE AT ESSENTIALLY THE SAME TEMPERATURE BELOW 500*C., AND THEREAFTER RECOVERING THE TETRAFLUOROETHYLENE FORMED.
Claim 2
Dependent Claim
46 words
THE PROCESS OF SYNTHESIZING TETRAFLUOROETHYLENE COMPRISING PYROLYZING A FLUORINE COMPOUND, CAPABLE OF DECOMPOSITION AT A TEMPERATURE ABOVE 1700*C., AT A TEMPERATURE OF AT LEAST 1700*C. AND THEREAFTER CONTACTING THE PYROLYZED GASEOUS PRODUCT WHILE AT ESSENTIALLY THE SAME TEMPERATURE BELOW 500*C., AND THEREAFTER RECOVERING THE TETRAFLUOROETHYLENE FORMED.
References Cited (Backward Citations)
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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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |