US3004294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of granular products
Assignee: Hoechst AG
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Filing: 1959-03-04
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Granted: 1961-10-17
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Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Richard Kurt
- 👤 Hildebrandt Hans-Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:13
CPC Classifications
B; B29; B29B; B29B9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS FOR GRANULATING A POWDER-LIKE NON-METALLIC MATERIAL WHICH IS CAPABLE OF BEING MOLDED BY PRESSURE TO COMPACT GRANULAR PRODUCTS IN WHICH THE POWDER PARTICLES ARE WELDED TOGETHER WITHOUT THE APPLICATION OF ADDITIONAL HEAT BEING NECESSARY TO SOFTENN THE MATERIAL WHICH COMPRISES PRESSING SAID MATERIAL UNDER A PRESSURE OF BETWEEN 100 AND 4000 KG./CM.2 BY A PISTON FROM A HOLLOW SPACE THROUGH A PLATE HAVING A PLURALITY OF GAPS, THE RATIO OF THE PISTON SURFACE TO THE TOTAL AREA OCCUPIED BY SAID GAPS BEING BETWEEN 1.2 AND 2.2, THE POWDER-LIKE MATERIAL BEING ADMITTED TO SAID HOLLOW SPACE BY THE ACTION OF SAID PISTON, THE PROCESS BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE BETWEEN ROOM TEMPERATURE AND A TEMPERATURE BELOW THE SOFTENING POINT OF THE MATERIAL.
Claim 2
Dependent Claim
127 words
A PROCESS FOR GRANULATING A POWDER-LIKE NON-METALLIC MATERIAL WHICH IS CAPABLE OF BEING MOLDED BY PRESSURE TO COMPACT GRANULAR PRODUCTS IN WHICH THE POWDER PARTICLES ARE WELDED TOGETHER WITHOUT THE APPLICATION OF ADDITIONAL HEAT BEING NECESSARY TO SOFTENN THE MATERIAL WHICH COMPRISES PRESSING SAID MATERIAL UNDER A PRESSURE OF BETWEEN 100 AND 4000 KG./CM.2 BY A PISTON FROM A HOLLOW SPACE THROUGH A PLATE HAVING A PLURALITY OF GAPS, THE RATIO OF THE PISTON SURFACE TO THE TOTAL AREA OCCUPIED BY SAID GAPS BEING BETWEEN 1.2 AND 2.2, THE POWDER-LIKE MATERIAL BEING ADMITTED TO SAID HOLLOW SPACE BY THE ACTION OF SAID PISTON, THE PROCESS BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE BETWEEN ROOM TEMPERATURE AND A TEMPERATURE BELOW THE SOFTENING POINT OF THE MATERIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |