US3705248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding of powdered or granular material
Assignee: Unifrax I LLC
•
Filing: 1970-04-15
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Granted: 1972-12-05
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Expires: 1990-04-15
Abstract
Abstract SHAPED ARTICLES (E.G., CERAMIC DISHES) ARE MOLDED FROM A MOLDABLE RAW MIX WITH A PRESS WHICH UTILIZES A SEPARABLE RUBBER SHEET WITHIN THE FEMALE DIE. THE RUBBER SHEET (1) SUPPORTS THE MIX TO BE MOLDED; (2) DISTRIBUTES PRESSURE UNIFORMLY DURING MOLDING; AND (3) RELEASES THE MOLDED PART FROM THE FEMALE DIE AFTER MOLDING. THE RUBBER SHEET ADVANTAGEOUSLY FORMS PART OF A CONVEYOR BELT. THE USE OF A FEMALE DIE WHICH IS ITSELF RUBBER, IN ADDITION TO THE RUBBER SHEET, AIDS IN PRESSURE DISTRIBUTION DURING MOLDING. D R A W I N G
Inventors
- 👤 Vincent G Hill
- 👤 William R Harding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/06; Y; Y10; Y10S; Y10S264/00; Y10S264/78
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |