US3175918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous refractory bodies and the manufacture thereof
Assignee: Unifrax I LLC
•
Filing: 1960-10-07
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Granted: 1965-03-30
•
Expires: 1980-10-07
Abstract
No abstract record available.
Inventors
- 👤 John J Mcgahan
- 👤 Raymond A Caine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/56; C04B35/5607; C04B35/5611; C04B35/565; C04B35/573; C04B35/58085; C04B35/58092; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63448; C04B35/63472; C04B35/63476; C04B38/00; C04B38/10; C04B2235/00; C04B2235/65; C04B2235/656; Y; Y10; Y10S; Y10S264/00; Y10S264/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A METHOD OF MANUFACTURING POROUS, SELF-BONDED REFRACTORY BODIES WHEREIN SOLELY AN INERNAL SOURCE OF CARBON IS UTILIZED FOR THE DESIRED BOND-FORMING REACTION AND CONSISTING ESSENTIALLY OF THE STEPS OF MIXING TOGETHER FINELY DIVIDED PARTICLES OF A REFRACTORY BOND-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICON, BORON, CARBIDES OF SILICON, AND BORON, OXIDES OF METALS OF GROUPS IV, V, AND VI OF THE PERIODIC TABLE, AND MIXTURES THEREOF, A CARBONACEOUS RESIN BINDER CAPABLE OF BEING FIRED TO A RELATIVELY CLEAN CARBON RESIDUE, AND A CARBONIZABLE FOAMING AGENT, FORMING THE MIXTURE TO A DESIRED SHAPE, FOAMING THE MIXTURE, HEATING THE FOAMED SHAPE TO A SUFFICIENT EXTENT TO CURE AND CARBONIZE THE BINDER AND FOAMING AGENT THEREBY FORMING A POROUS CARBON RESIDUE IN SAID FOAMED SHAPE, AND MATURING THE CARBONIZED SHAPE AT A TEMPERATURE IN THE RANGE OF BETWEEN ABOUT 1800*C. AND ABOUT 2400*C.. TO REACT SAID CARBON RESIDUE AND SAID REFRATORY BOND-FORMING MATERIAL THEREBY FORMING SAID POROUS, SELF-BONDED REFRACTORY BODY HAVING A LOW BULK DENSITY.
Claim 2
Independent Claim
164 words
A METHOD OF MANUFACTURING POROUS, SELF-BONDED REFRACTORY BODIES WHEREIN SOLELY AN INERNAL SOURCE OF CARBON IS UTILIZED FOR THE DESIRED BOND-FORMING REACTION AND CONSISTING ESSENTIALLY OF THE STEPS OF MIXING TOGETHER FINELY DIVIDED PARTICLES OF A REFRACTORY BOND-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICON, BORON, CARBIDES OF SILICON, AND BORON, OXIDES OF METALS OF GROUPS IV, V, AND VI OF THE PERIODIC TABLE, AND MIXTURES THEREOF, A CARBONACEOUS RESIN BINDER CAPABLE OF BEING FIRED TO A RELATIVELY CLEAN CARBON RESIDUE, AND A CARBONIZABLE FOAMING AGENT, FORMING THE MIXTURE TO A DESIRED SHAPE, FOAMING THE MIXTURE, HEATING THE FOAMED SHAPE TO A SUFFICIENT EXTENT TO CURE AND CARBONIZE THE BINDER AND FOAMING AGENT THEREBY FORMING A POROUS CARBON RESIDUE IN SAID FOAMED SHAPE, AND MATURING THE CARBONIZED SHAPE AT A TEMPERATURE IN THE RANGE OF BETWEEN ABOUT 1800*C. AND ABOUT 2400*C.. TO REACT SAID CARBON RESIDUE AND SAID REFRATORY BOND-FORMING MATERIAL THEREBY FORMING SAID POROUS, SELF-BONDED REFRACTORY BODY HAVING A LOW BULK DENSITY.
Claim 3
Dependent Claim
36 words
A POROUS REFRACTORY BODY CONSISTING ESSENTIALLY OF SELF-BONDED SILICON ARBIDE HAVING A PROSITY OF BETWEEN ABOUT 80% AND 90% AND A DENSITY IN THE RANGE OF FROM ABOUT 0.25 TO ABOUT 0.6 GRAM PER CUBIC CENTIMETER.
Claim 4
Dependent Claim
36 words
A POROUS REFRACTORY BODY CONSISTING ESSENTIALLY OF SELF-BONDED SILICON ARBIDE HAVING A PROSITY OF BETWEEN ABOUT 80% AND 90% AND A DENSITY IN THE RANGE OF FROM ABOUT 0.25 TO ABOUT 0.6 GRAM PER CUBIC CENTIMETER.
References Cited (Backward Citations)
US1013701A
Cited
US1266478A
Cited
US2636828A
Cited
GB716422A
Cited
US2784112A
Cited
US2797201A
Cited
US2908553A
Cited
US2906717A
Cited
US2917384A
Cited
US2887393A
Cited
US2938807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |