Patent US2039409A successfully refreshed from Google Patents.
Patent US3227782A successfully refreshed from Google Patents.
US3227782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing ceramic materials
Assignee: US Philips Corp
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Filing: 1962-06-25
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Granted: 1966-01-04
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Gie Ong Tjing
- 👤 Berghuis Pauwel Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:56
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/30; F27B9/3005; F27B9/3011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF FIRING FERRITE WARE IN A MUFFLE FURNACE HAVING AN ELONGATED IMPERFORATE CHANNEL THROUGH WHICH SAID WARE IS CONVEYED; SAID METHOD COMPRISING THE STEPS OF APPLYING HEAT EXTERNALLY TO SAID CHANNEL TO PROVIDE A DETERMINED TEMPERATURE GRADIENT LONGITUDINALLY OF SAID CHANNEL, INTRODUCING AND WITHDRAWING TREATING ATMOSPHERES CONTAINING VARYING QUANTITIES OF OXYGEN IN SAID ATMOSPHERES AT SPACED INTERVALS ALONG SAID CHANNEL TO DEFINE A PLURALITY OF DISCRETE TREATMENT ZONES TRNASVERSELY OF SAID CHANNEL, AND MAINTAINING ATMOSPHERIC PRESSURE THROUGHOUT EACH ZONE OF SAID FURNACE CHANNEL.
Claim 2
Independent Claim
85 words
A METHOD OF FIRING FERRITE WARE IN A MUFFLE FURNACE HAVING AN ELONGATED IMPERFORATE CHANNEL THROUGH WHICH SAID WARE IS CONVEYED; SAID METHOD COMPRISING THE STEPS OF APPLYING HEAT EXTERNALLY TO SAID CHANNEL TO PROVIDE A DETERMINED TEMPERATURE GRADIENT LONGITUDINALLY OF SAID CHANNEL, INTRODUCING AND WITHDRAWING TREATING ATMOSPHERES CONTAINING VARYING QUANTITIES OF OXYGEN IN SAID ATMOSPHERES AT SPACED INTERVALS ALONG SAID CHANNEL TO DEFINE A PLURALITY OF DISCRETE TREATMENT ZONES TRNASVERSELY OF SAID CHANNEL, AND MAINTAINING ATMOSPHERIC PRESSURE THROUGHOUT EACH ZONE OF SAID FURNACE CHANNEL.
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) | 1969-01-03 | 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 |