US2602824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing liquid polymeric chlorotrifluoroethylene
Assignee: Wyeth Holdings LLC
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Filing: 1949-03-31
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Granted: 1952-07-08
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Expires: 1969-03-31
Abstract
No abstract record available.
Inventors
- 👤 John J Padbury
- 👤 Edward L Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
THE METHOD OF PRODUCING LIQUID POLYMERIC CHLOROTRIFLUOROETHYLENE ADAPTED FOR USE AS A LUBRICANT WHICH COMPRISES CONTINUOUSLY CHARGING TO A CONDUIT LEADING TO A HEATED REACTION ZONE MONOMERIC CHLOROTRIFLUOROETHYLENE AND A CATALYST SELECTED FROMTHE CLASS CONSISTING OF DI-(TER-BUTYL) PEROXIDE, 2,2-BIS-(TERT-BUTYL PEROXY) BUTANE AND MIXTURES THEREOF, THE AMOUNT OF THE SAID CATALYST CORRESPONDING TO FROM 0.5 TO 10% BY WEIGHT OF THE MONOMERIC CHLOROTRIFLUOROETHYLENE WHICH IS CHARGED TO THE SAID CONDUIT, PREVENTING ANY BACK DIFFUSION OF GASES FROM THE SAID HEATED REACTION ZONE BY SIMULTANEOUSLY CHARGING TO THE SAID CONDUIT, PRIOR TO THE POINT OF CHARGING THERETO THE SAID MONOMERIC CHLOROTRIFLUOROETHYLENE AND THE SAID CATALYST, A GAS WHICH IS INERT DURING THE REACTION, THE SAID CATALYST AND MONOMER BEING HEATED TOGETHER IN THE SAID ZONE IN THE PRESENCE OF THE SAID INERT GAS AT A TEMPERATURE WITHIN THE RANGE OF 150* C. TO 450* C. FOR A PERIOD SUFFICIENTLY LONG TO FORM A SUBSTANTIAL AMOUNT OF POLYMERIC CHLOROTRIFLUOROETHYLENE WHICH IS LIQUID AT ROOM TEMPERATURE AND AT ATMOSPHERIC PRESSURE, AND ISOLATING THE SAID POLYMERIC CHLOROTRIFLUORETHYLENE.
Claim 2
Independent Claim
172 words
THE METHOD OF PRODUCING LIQUID POLYMERIC CHLOROTRIFLUOROETHYLENE ADAPTED FOR USE AS A LUBRICANT WHICH COMPRISES CONTINUOUSLY CHARGING TO A CONDUIT LEADING TO A HEATED REACTION ZONE MONOMERIC CHLOROTRIFLUOROETHYLENE AND A CATALYST SELECTED FROMTHE CLASS CONSISTING OF DI-(TER-BUTYL) PEROXIDE, 2,2-BIS-(TERT-BUTYL PEROXY) BUTANE AND MIXTURES THEREOF, THE AMOUNT OF THE SAID CATALYST CORRESPONDING TO FROM 0.5 TO 10% BY WEIGHT OF THE MONOMERIC CHLOROTRIFLUOROETHYLENE WHICH IS CHARGED TO THE SAID CONDUIT, PREVENTING ANY BACK DIFFUSION OF GASES FROM THE SAID HEATED REACTION ZONE BY SIMULTANEOUSLY CHARGING TO THE SAID CONDUIT, PRIOR TO THE POINT OF CHARGING THERETO THE SAID MONOMERIC CHLOROTRIFLUOROETHYLENE AND THE SAID CATALYST, A GAS WHICH IS INERT DURING THE REACTION, THE SAID CATALYST AND MONOMER BEING HEATED TOGETHER IN THE SAID ZONE IN THE PRESENCE OF THE SAID INERT GAS AT A TEMPERATURE WITHIN THE RANGE OF 150* C. TO 450* C. FOR A PERIOD SUFFICIENTLY LONG TO FORM A SUBSTANTIAL AMOUNT OF POLYMERIC CHLOROTRIFLUOROETHYLENE WHICH IS LIQUID AT ROOM TEMPERATURE AND AT ATMOSPHERIC PRESSURE, AND ISOLATING THE SAID POLYMERIC CHLOROTRIFLUORETHYLENE.
References Cited (Backward Citations)
US2426476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |