US3300322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot top
Assignee: Sandvik AB
•
Filing: 1963-10-23
•
Granted: 1967-01-24
•
Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Geer Hans Holmar De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
B; B22; B22C; B22C23/00; B22C23/02; B22D; B22D7/00; B22D7/06; B22D7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
HOT TOP FOR INGOT AND SIMILAR CASTING MOLDS FOR CASTING STEEL AND OTHER METALS CONSISTING OF FROM 3 TO 15% OF AN ORGANIC FIBROUS MATERIAL, UP TO 10% OF A REFRACTORY FIBROUS MATERIAL, UP TO 12% OF AN ORGANIC GLUE AND FROM 82 TO 94% OF A FINE GRAINED REFRACTORY MATERIAL SUBSTANTIALLY ALL OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 1.0 MM., AT LEAST 50% OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 0.84 MM., AT LEAST 20% AND AT MOST 90% OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 0.105 MM. AND AT MOST 60% OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 0.053 MM.
Claim 2
Dependent Claim
115 words
HOT TOP FOR INGOT AND SIMILAR CASTING MOLDS FOR CASTING STEEL AND OTHER METALS CONSISTING OF FROM 3 TO 15% OF AN ORGANIC FIBROUS MATERIAL, UP TO 10% OF A REFRACTORY FIBROUS MATERIAL, UP TO 12% OF AN ORGANIC GLUE AND FROM 82 TO 94% OF A FINE GRAINED REFRACTORY MATERIAL SUBSTANTIALLY ALL OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 1.0 MM., AT LEAST 50% OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 0.84 MM., AT LEAST 20% AND AT MOST 90% OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 0.105 MM. AND AT MOST 60% OF WHICH WILL PASS A SCREEN WITH MESH OPENINGS OF 0.053 MM.
References Cited (Backward Citations)
US3072981A
Cited
US3165799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |