Patent US2664449A successfully refreshed from Google Patents.
US2664449A
Expired / Lapsed
US
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Pyrolysis of trifluorochloroethylene polymers
Assignee: Individual
•
Filing: 1947-01-06
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Granted: 1953-12-29
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Expires: 1967-01-06
Abstract
No abstract record available.
Inventors
- 👤 William T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:44
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/361; C07C17/367; C07C17/35; C07C17/358
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE PROCESS WHICH COMPRISES THE STEPS OF HEATING A NORMALLY SOLID POLYMER OF TRIFLUOROCHLOROETHYLENE HAVING A MELTING POINT OF LESS THAN ABOUT 200* C. IN A REACTION ZONE AT A TEMPERATURE OF FROM ABOUT 300* C. TO ABOUT 450* C. AND SUFFICIENT TO SPLIT A CARBON-CARBON BOND TO CAUSE THE PYROLYSIS OF SAID POLYMER TO PRODUCTS CONTAINING A MAJOR PORTION OF MATERIALS OF SUBSTANTIALLY HIGHER MOLECULAR WEIGHT THAN THE MONOMER, DISTILLING SAID PYROLYSIS PRODUCTS FROM THE REACTION ZONE AS FORMED, AND COLLECTING SAID PYROLYSIS PRODUCTS.
Claim 2
Dependent Claim
85 words
THE PROCESS WHICH COMPRISES THE STEPS OF HEATING A NORMALLY SOLID POLYMER OF TRIFLUOROCHLOROETHYLENE HAVING A MELTING POINT OF LESS THAN ABOUT 200* C. IN A REACTION ZONE AT A TEMPERATURE OF FROM ABOUT 300* C. TO ABOUT 450* C. AND SUFFICIENT TO SPLIT A CARBON-CARBON BOND TO CAUSE THE PYROLYSIS OF SAID POLYMER TO PRODUCTS CONTAINING A MAJOR PORTION OF MATERIALS OF SUBSTANTIALLY HIGHER MOLECULAR WEIGHT THAN THE MONOMER, DISTILLING SAID PYROLYSIS PRODUCTS FROM THE REACTION ZONE AS FORMED, AND COLLECTING SAID PYROLYSIS PRODUCTS.
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) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |