Patent US3565834A successfully refreshed from Google Patents.
US3565834A
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US
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Production of polyamide moldings
Assignee: BASF SE
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Filing: 1968-12-11
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Granted: 1971-02-23
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Expires: 1988-12-11
Abstract
Abstract PRODUCTION OF POLYAMIDE MOLDINGS WHICH CAN BE USED AS ROLLERS, GEAR WHEELS OR PIPES BY ACTIVATED ANIONIC POLYMERIZATION OF A LACTAM IN THE PRESENCE OF AN ANIONIC CATALYST AND A CATALYST WHEREIN SAID LACTAM IS POLYMERIZED IN THE PRESENCE OF, AND IS REACTED DURING POLYMERIZATION WITH, A POLEPOXIDE. ALSO, PRODUCTION OF VISCOELASTIC FOAMS WITH, A POLYEPOXIDE. ALSO, PRODUCTION OF VISCOELASTIC FOAMS BY EMPLOYMENT OF GAS-PRODUCING FOAMING AGENT IN REACTION MIXTURE.
Inventors
- 👤 Karl Dachs
- 👤 Hans Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:17
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; B; B29; B29C; B29C39/00; B29C39/003; B29C39/006; B29C41/00; B29C41/003; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; B29C41/02; B29C41/04; B29K; B29K2077/00; B29K2105/00; B29K2105/0058; B29K2105/0067; B29K2105/04; B29L; B29L2015/00; B29L2015/003; B29L2023/00; B29L2023/22; B29L2031/00; B29L2031/16; C08J2377/00; C08J2377/02
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |