Patent US3384499A successfully refreshed from Google Patents.
US3384499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystalline bonded ceramic ware pressing mold and method of making same
Assignee: Murray Corp
•
Filing: 1963-09-18
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Granted: 1968-05-21
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Expires: 1983-09-18
Abstract
No abstract record available.
Inventors
- 👤 Andrew R Blackburn
- 👤 Virgil D Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:46
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/34; B28B7/344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A POROUS CRYSTALINE BONDED CERAMIC MOLD COMPRISING AT LEAST 70% ALUMINA, UP TO 15% BALL CLAY AND UP TO 15% TALC FIRED TO A POINT SHORT OF THE THEORETICAL DENSITY FOR THE CERAMIC TO PROVIDE SUBSTANTIALLY UNIFORMLY DISTRIBUTED POROSITY, SAID MOLD MAVING CHARACTERISTICS APPROPRIATE FOR USE IN WARE FORMING OPERATIONS.
Claim 2
Dependent Claim
50 words
A POROUS CRYSTALINE BONDED CERAMIC MOLD COMPRISING AT LEAST 70% ALUMINA, UP TO 15% BALL CLAY AND UP TO 15% TALC FIRED TO A POINT SHORT OF THE THEORETICAL DENSITY FOR THE CERAMIC TO PROVIDE SUBSTANTIALLY UNIFORMLY DISTRIBUTED POROSITY, SAID MOLD MAVING CHARACTERISTICS APPROPRIATE FOR USE IN WARE FORMING OPERATIONS.
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |