US3258349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light porous refractory brick and method
Assignee: Saint Gobain Abrasives Inc
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Filing: 1962-05-11
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Granted: 1966-06-28
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 George F Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:46
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C04B38/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A REFRACTORY SHAPE HAVING A TOTAL POROSITY OF 70 TO 97%, AND A MELTING POINT ABOVE 1400*C., SAID SHAPE CONSISTING SUBSTANTIALLY OF INTERCONNECTING HOLLOW PARTICLES BETWEEN .01 AND .25 INCH IN DIAMETER WITH INTERPARTICULAR PORES BETWEEN THE HOLLOW PARTICLES, AND WITH THE AVERAGE WALL THICKNESS OF SAID PARTICLES AS MEASURED BY A LINEAR CROSS SECTION BEING LESS THAN THE AVERAGE DISTANCE ACROSS SAID INTERPARTICULAR PORES AND PORES OF THE HOLLOWS, AND WITH THE INTERCONNECTIONS BETWEEN PARTICLES BEING STRUCTURALLY AND CHEMICALLY THE SAME AS THE PARTICLE WALLS.
Claim 2
Dependent Claim
86 words
A REFRACTORY SHAPE HAVING A TOTAL POROSITY OF 70 TO 97%, AND A MELTING POINT ABOVE 1400*C., SAID SHAPE CONSISTING SUBSTANTIALLY OF INTERCONNECTING HOLLOW PARTICLES BETWEEN .01 AND .25 INCH IN DIAMETER WITH INTERPARTICULAR PORES BETWEEN THE HOLLOW PARTICLES, AND WITH THE AVERAGE WALL THICKNESS OF SAID PARTICLES AS MEASURED BY A LINEAR CROSS SECTION BEING LESS THAN THE AVERAGE DISTANCE ACROSS SAID INTERPARTICULAR PORES AND PORES OF THE HOLLOWS, AND WITH THE INTERCONNECTIONS BETWEEN PARTICLES BEING STRUCTURALLY AND CHEMICALLY THE SAME AS THE PARTICLE WALLS.
Claim 3
Independent Claim
78 words
A METHOD OF FORMING A REFRACTORY SHAPE COMPRISING MIXING A REFRACTORY POWDER WITH A BINDER, A PARTICULATE ORGANIC MATERIAL, AND A LIQUID WHEREBY A COATING OF REFRACTORY POWDER IS FORMED AROUND ORGANIC PARTICLE, FORMING THE MIXTURE TO SHAPE IN A MOLD WHEREBY PORES ARE MAINTAINED BETWEEN ADJACENT COATED ORGANIC PARTICLES, FIRING SAID MIXTURE WHEREBY SAID ORGANIC MATERIAL IS REMOVED FROM THE MIXTURE AND THE MIXTRUE IS CONVERTED INTO A REFRACTORY SHAPE HAVING A TOTAL POROSITY GREATER THAN 65%.
Claim 4
Independent Claim
78 words
A METHOD OF FORMING A REFRACTORY SHAPE COMPRISING MIXING A REFRACTORY POWDER WITH A BINDER, A PARTICULATE ORGANIC MATERIAL, AND A LIQUID WHEREBY A COATING OF REFRACTORY POWDER IS FORMED AROUND ORGANIC PARTICLE, FORMING THE MIXTURE TO SHAPE IN A MOLD WHEREBY PORES ARE MAINTAINED BETWEEN ADJACENT COATED ORGANIC PARTICLES, FIRING SAID MIXTURE WHEREBY SAID ORGANIC MATERIAL IS REMOVED FROM THE MIXTURE AND THE MIXTRUE IS CONVERTED INTO A REFRACTORY SHAPE HAVING A TOTAL POROSITY GREATER THAN 65%.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |