Patent US3823213A successfully refreshed from Google Patents.
US3823213A
Expired / Lapsed
US
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Production of expanded moldings of olefin polymers
Assignee: BASF SE
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Filing: 1969-09-18
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Granted: 1974-07-09
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Expires: 1989-09-18
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF MOLDINGS OF EXPANDED POLYMERS OF OLEFINS HAVING TWO OR THREE CARBON ATOMS IN WHICH THE EXPANED PARTICLES OF THE POLYMER, WHICH CONTAIN CROSSLINKED PORTIONS, ARE HEATED IN MOLDS AND FUSED TOGETHER, IF DESIRED UNDER PRESSURE.
Inventors
- 👤 F Stastny
- 👤 R Gaeth
- 👤 H Trieschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/232; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/17; Y10S264/18; Y10S521/00; Y10S521/915
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |