US3264380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power press process for forming lightweight refractory articles, and articles so made
Assignee: Chicago Fire Brick Co
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Filing: 1964-02-11
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Granted: 1966-08-02
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Expires: 1984-02-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
THE METHOD OF FORMING A LIGHTWEIGHT REFRACTORY SHAPED ARTICLE WHICH COMPRISES MIXING TOGETHER A FIRST LIGHTWEIGHT REFRACTORY AGGREGATE HAVING A DENSITY OF LESS THAN 50 POUNDS PER CUBIC FOOT, WATER, AND A SECOND REFRACTORY AGGREGATE WHICH IS CRUSHABLE AT A PRESSURE BELOW THAT AT WHICH SAID FIRST AGGREGATE IS CRUSHABLE, AND PRESSING THE MIXTURE INTO A SHAPED ARTICLE AT A PRESSURE SUCH AS TO CRUSH SAID SECOND AGGREGATE.
Claim 2
Independent Claim
68 words
THE METHOD OF FORMING A LIGHTWEIGHT REFRACTORY SHAPED ARTICLE WHICH COMPRISES MIXING TOGETHER A FIRST LIGHTWEIGHT REFRACTORY AGGREGATE HAVING A DENSITY OF LESS THAN 50 POUNDS PER CUBIC FOOT, WATER, AND A SECOND REFRACTORY AGGREGATE WHICH IS CRUSHABLE AT A PRESSURE BELOW THAT AT WHICH SAID FIRST AGGREGATE IS CRUSHABLE, AND PRESSING THE MIXTURE INTO A SHAPED ARTICLE AT A PRESSURE SUCH AS TO CRUSH SAID SECOND AGGREGATE.
Claim 3
Independent Claim
127 words
THE METHOD OF FORMING A LIGHTWEIGHT REFRACTORY SHAPED ARTICLE HAVING A PORTION OF SAID ARTICLE OF GREATER STRENGHT THAN THE REMAINDER OF SAID ARTICLE WHICH METHOD COMPRISES MIXING TOGETHER A LIGHTWEIGHT REFRACTORY AGGREGATE, A MINO AMOUNT OF WATER, AND A SECOND AGGREGATE WHICH IS CRUHABLE AT BELOW THE PRESSURE AT WHICH SAID FIRST AGGREGATE IS CRUSHABLE TO FORM A MIXTURE, PRESSING THE MIXTURE INTO A SHAPED ARTICLE BY SUBJECTING ONE SURFACE PORTION OF THE MIXTURE TO A HIGHER PRESSURE THAN THE PRESSURE ON AN ADJACENT SURFACE PORTION, THE HIGHER PRESSURE BEING SUFFICIENT OT CRUSH BOTH THE FIRST AND SECOND AGGREGATES IN THE UNDERLYING PORTION WHERE THE HIGHER PRESSURE IS APPLIED, AND THE LOWER PRESSURE BEING SUCH AS TO CRUSH THE SECOND AGGREGATE WITHOUT CRUSHING THE FIRST AGGREGATE.
Claim 4
Independent Claim
127 words
THE METHOD OF FORMING A LIGHTWEIGHT REFRACTORY SHAPED ARTICLE HAVING A PORTION OF SAID ARTICLE OF GREATER STRENGHT THAN THE REMAINDER OF SAID ARTICLE WHICH METHOD COMPRISES MIXING TOGETHER A LIGHTWEIGHT REFRACTORY AGGREGATE, A MINO AMOUNT OF WATER, AND A SECOND AGGREGATE WHICH IS CRUHABLE AT BELOW THE PRESSURE AT WHICH SAID FIRST AGGREGATE IS CRUSHABLE TO FORM A MIXTURE, PRESSING THE MIXTURE INTO A SHAPED ARTICLE BY SUBJECTING ONE SURFACE PORTION OF THE MIXTURE TO A HIGHER PRESSURE THAN THE PRESSURE ON AN ADJACENT SURFACE PORTION, THE HIGHER PRESSURE BEING SUFFICIENT OT CRUSH BOTH THE FIRST AND SECOND AGGREGATES IN THE UNDERLYING PORTION WHERE THE HIGHER PRESSURE IS APPLIED, AND THE LOWER PRESSURE BEING SUCH AS TO CRUSH THE SECOND AGGREGATE WITHOUT CRUSHING THE FIRST AGGREGATE.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |