Patent US3417641A successfully refreshed from Google Patents.
Patent US3600337A successfully refreshed from Google Patents.
US3600337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making epoxy cellular plastics
Assignee: Hoechst AG
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Filing: 1968-03-07
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Granted: 1971-08-17
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Expires: 1988-03-07
Abstract
Abstract EPOXY CELLULAR PLASTICS ARE PRODUCED BY FOAMING AND CURING AN EPOXY RESIN IN THE PRESENCE OF A BLOWING AGENT, AN ALIPHATIC OR CYCLOALIPHATIC POLYHYDRIC ALCOHOL AND A LEWIS ACID OR AN ADDITION- OR COMPLEX COMPOUND OF A LEWIS ACID.
Inventors
- 👤 Edgar Fischer
- 👤 Ernst Nolken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08K; C08K5/00; C08K5/04; C08K5/05; C08J2363/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |