US3825519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding composition containing polyethylene and cement
Assignee: Kureha Corp
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Filing: 1972-08-11
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Granted: 1974-07-23
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Expires: 1992-08-11
Abstract
Abstract A MOLDING COMPOSITION CONTAINING POLYETHYLENE AND A CEMENT SELECTED FROM THE GROUP: PORTLAND CEMENTS ALUMINA CEMENTS, MAGNESTIA CEMENTS TO A POLYETHYLENE MELT AND TION IS BY ADDING THE CEMENT WITH A POLYETHYLENE KNEADING OR BY MIXING THE CEMENT WITH A POLYETHYLENE POWDER AND KNEADING AT A TEMPERATURE ABOVE THE MELTING FPOINT OF THE POLYETHYLENE.
Inventors
- 👤 N Murayama
- 👤 M Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:47
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C04B26/045
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |