US3227566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory materials
Assignee: Morganite Research and Development Ltd
•
Filing: 1963-05-06
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Granted: 1966-01-04
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Expires: 1983-05-06
Abstract
No abstract record available.
Inventors
- 👤 Hilton Raymond Frederick
- 👤 Goodman Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:44
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/52; C04B35/522; C04B35/528; C04B35/532; C04B35/573; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63496; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/34; C04B2235/3409; C04B2235/36; C04B2235/38; C04B2235/3817; C04B2235/3826; C04B2235/40; C04B2235/405; C04B2235/42; C04B2235/422; C04B2235/425; C04B2235/428; C04B2235/44; C04B2235/444; C04B2235/445; C04B2235/50; C04B2235/52; C04B2235/5292; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/6567; C04B2235/66; C04B2235/661
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A PROCESS FOR THE PRODUCTION OF A REFRACTORY MATERIAL BY FIRING A SHAPED MIXTURE COMPRISING A BLEND OF FROM 20-60% BY WEIGHT OF FLAKE GRAPHITE, FROM 20-65% BY WEIGHT OF SILICON CARBIDE AND FROM 5-50% BY WEIGHT OF A MATERIAL SLECTED FROM THE GROUP CONSISTING OF SILICON AND FERROSILICON, SAID BLEND BEING BONDED WITH A CARBON-YIELDING BINDER IN A RATIO OF 15-35 PARTS BY WEIGHT OF BINDER PER 100 PARTS BY WEIGHT OF BLEND AND ALLOWING THE MATERIAL TO COOL, THE STEP OF INITIALLY HEATING THE SHAPED MIXTURE IN A NON-OXIDISING NITROGENCONTAINING ATMOSPHERE TO A TEMPERTURE WITHIN THE RANGE OF 1150-1350*C., MAINTAINING THE MIXTURE AT THIS TEMPERATURE FOR A PERIOD OF TIME NOT EXCEEDING 24 HOURS, RAPIDLY INCREASING THE TEMPERATURE TO 1400-1550*C. OVER A PERIOD OF TIME NOT EXCEEDING 1 HOUR AND MAINTAINING THIS TEMPERATURE FOR ABOUT 15 TO 30 MINUTES.
Claim 2
Dependent Claim
142 words
IN A PROCESS FOR THE PRODUCTION OF A REFRACTORY MATERIAL BY FIRING A SHAPED MIXTURE COMPRISING A BLEND OF FROM 20-60% BY WEIGHT OF FLAKE GRAPHITE, FROM 20-65% BY WEIGHT OF SILICON CARBIDE AND FROM 5-50% BY WEIGHT OF A MATERIAL SLECTED FROM THE GROUP CONSISTING OF SILICON AND FERROSILICON, SAID BLEND BEING BONDED WITH A CARBON-YIELDING BINDER IN A RATIO OF 15-35 PARTS BY WEIGHT OF BINDER PER 100 PARTS BY WEIGHT OF BLEND AND ALLOWING THE MATERIAL TO COOL, THE STEP OF INITIALLY HEATING THE SHAPED MIXTURE IN A NON-OXIDISING NITROGENCONTAINING ATMOSPHERE TO A TEMPERTURE WITHIN THE RANGE OF 1150-1350*C., MAINTAINING THE MIXTURE AT THIS TEMPERATURE FOR A PERIOD OF TIME NOT EXCEEDING 24 HOURS, RAPIDLY INCREASING THE TEMPERATURE TO 1400-1550*C. OVER A PERIOD OF TIME NOT EXCEEDING 1 HOUR AND MAINTAINING THIS TEMPERATURE FOR ABOUT 15 TO 30 MINUTES.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |