US3298942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of graft copolymers of perhalogenated olefins
Assignee: Centre National de la Recherche Scientifique
•
Filing: 1958-05-20
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Granted: 1967-01-17
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Expires: 1978-05-20
Abstract
No abstract record available.
Inventors
- 👤 Magat Michel
- 👤 Chapiro Adolphe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C08F; C08F259/00; C08F259/02; C08F259/04; C08F259/08; C08F291/00; C08F291/18; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2243; C08J5/225; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE PROCESS FOR PRODUCING GRAFT COPOLYMERS, IN WHICH STYRENE IS GRAFTED ON A POLYPERHALOGENATED OLEFIN SELECTED FROM THE GROUP CONSISTING OF POLYTETRAFLUOROETHYLENE AND POLYCHLOROTRIFLUOROETHYLENE POLYMER, IN WHICH SAID POLYMER IS SUBJECTED TO HIGH ENERGY IONIZING RADIATION IN THE PRESENCE OF STYRENE, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE RADIATION AT A LOW INTENSITY, PRODUCING A POLYMERIZATION RATE BELOW THE RATE OF PENETRATION OF THE MONOMER THROUGH THE GRAFT COPOLYMER FORMED, WHILE THE MONOMER IS PRESENT IN A SOLVENT.
Claim 2
Dependent Claim
78 words
IN THE PROCESS FOR PRODUCING GRAFT COPOLYMERS, IN WHICH STYRENE IS GRAFTED ON A POLYPERHALOGENATED OLEFIN SELECTED FROM THE GROUP CONSISTING OF POLYTETRAFLUOROETHYLENE AND POLYCHLOROTRIFLUOROETHYLENE POLYMER, IN WHICH SAID POLYMER IS SUBJECTED TO HIGH ENERGY IONIZING RADIATION IN THE PRESENCE OF STYRENE, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE RADIATION AT A LOW INTENSITY, PRODUCING A POLYMERIZATION RATE BELOW THE RATE OF PENETRATION OF THE MONOMER THROUGH THE GRAFT COPOLYMER FORMED, WHILE THE MONOMER IS PRESENT IN A SOLVENT.
References Cited (Backward Citations)
US2837496A
Cited
GB801258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |