Patent US3546326A successfully refreshed from Google Patents.
US3546326A
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Concurrent extrusion and cross-linking of polymers
Assignee: Huels AG
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Filing: 1966-05-26
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Granted: 1970-12-08
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Expires: 1986-05-26
Abstract
Abstract Isotactic polybutene-1 is cross-linked with sulfur and an organic peroxide which decomposes at 140-220 DEG C, e.g., dicumyl-peroxide.
Inventors
- 👤 Friedrich Seifert
- 👤 Josef Bittscheidt
- 👤 Johannes Plenikowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:42
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/06; B; B29; B29C; B29C48/00; B29C48/022; C08K5/00; C08K5/04; C08K5/14; B29C48/03; B29C48/05; B29C48/06; B29C48/09; B29K; B29K2101/00; B29K2101/10; B29K2301/00; B29K2301/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA687263A
Cited
US2919474A
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US2972780A
Cited
US3201503A
Cited
US3329647A
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US3377415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |