Patent US2215128A successfully refreshed from Google Patents.
Patent US2497046A successfully refreshed from Google Patents.
US2497046A
Expired / Lapsed
US
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Fluorination of polymeric materials
Assignee: Wyeth Holdings LLC
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Filing: 1945-10-12
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Granted: 1950-02-07
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Expires: 1965-10-12
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08F8/22; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A PROCESS WHICH COMPRISES FLUORINATING A SYNTHETIC ALIPHATIC HIGH-MOLECULAR-WEIGHT POLYMER OF A HALOGENATED ETHYLENE MONOMER, SAID MONOMER CONTAINING A HALOGEN ATOM SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE AND SAID POLYMER CONTAINING FROM 0% TO 2% OF HYDROGEN, AND CONTINUING THE FLUORINATION UNTIL A MARKED CHANGING IN THE PROPERTIES OF THE SAID POLYMER HAS BEEN EFFECTED.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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US2393967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |