Patent US2600804A successfully refreshed from Google Patents.
US2600804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of chlorotrifluoroethylene polymer-in-monomer slurry
Assignee: MW Kellogg Co
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Filing: 1948-04-13
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Granted: 1952-06-17
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Expires: 1968-04-13
Abstract
No abstract record available.
Inventors
- 👤 John S Rearick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:31
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
THE IMPROVED PROCESS FOR POLYMERIZING TRIFLUOROCHLOROETHYLENE WHICH COMPRISES INTRODUCING TRIFLUOROCHLOROETHYLENE INTO A REACTION ZONE, IN SAID REACTION ZONE POLYMERIZING TRIFLUOROCHLOROETHYLENE AT A TEMPERATURE BETWEEN ABOUT -20 AND ABOUT 25* C. IN THE PRESENCE OF A HALOGENATED ACYL PEROXIDE WHICH IS EFFECTIVE IN THE AFORESAID TERMPERATURE RANGE AS A PROMOTER FOR FTHE POLYMERIZATION AND AT A CORRESPONDING PRESSURE SUFFICIENT TO MAINTAIN MONOMER IN THE LIQUID PHASE TO PRODUCE PARTICLES OF SOLID POLYMER IN SUSPENSION IN LIQUID MONOMER AT THE TERPERATURE OF POLYMERIZATION, AND SEPARATING AND RECOVERING PARTICLES OF SOLID POLYMER FROM THE SUSPENSION AS A PRODUCT OF THE PROCESS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |