Patent EP0643391A1 successfully refreshed from Google Patents.
US2974008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for calcining or fritting ceramics
Assignee: Gulton Industries Inc
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Filing: 1957-03-14
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Granted: 1961-03-07
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Expires: 1977-03-14
Abstract
No abstract record available.
Inventors
- 👤 Glenn N Howatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:25
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/472
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF FORMING FINE PARTICLES OF PURE CALCINED CERAMICS WHICH COMPRISES MIXING AND GRINDING AT LEAST TWO REACTIVE COMPOUNDS IN THE PROPER PROPORTIONS TO FORM SAID CERAMIC, HEATING THE SAID GROUND AND MIXED COMPOUNDS IN A CONTAINER TO A TEMPERATURE JUST BELOW THE TEMPERATURE AT WHICH SAID COMPOUNDS WOULD REACT WITH THE CONTAINER, DROPPING THE SAID HEATED COMPOUNDS INTO A FLAME FOR SUSPENDING SAID COMPOUNDS IN THE FLAME AND FURTHER HEATING SAID COMPOUNDS IN THE FLAME TO A
Claim 2
Independent Claim
79 words
THE METHOD OF FORMING FINE PARTICLES OF PURE CALCINED CERAMICS WHICH COMPRISES MIXING AND GRINDING AT LEAST TWO REACTIVE COMPOUNDS IN THE PROPER PROPORTIONS TO FORM SAID CERAMIC, HEATING THE SAID GROUND AND MIXED COMPOUNDS IN A CONTAINER TO A TEMPERATURE JUST BELOW THE TEMPERATURE AT WHICH SAID COMPOUNDS WOULD REACT WITH THE CONTAINER, DROPPING THE SAID HEATED COMPOUNDS INTO A FLAME FOR SUSPENDING SAID COMPOUNDS IN THE FLAME AND FURTHER HEATING SAID COMPOUNDS IN THE FLAME TO A
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |