US3248215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method of heating powdered metals
Assignee: Ilikon Corp
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Filing: 1963-09-26
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Granted: 1966-04-26
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Expires: 1983-09-26
Abstract
No abstract record available.
Inventors
- 👤 Laszlo J Bonis
- 👤 Sandven Ole-Andreas
- 👤 Manning Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A HOT PRESSING APPARATUS WHICH INCLUDES: A SOURCE OF ENERGY; A MOLD CHARACTERIZEDBY AN INTERNAL MOLD CAVITY CAPABLE OF CONTAINING A LOOSELY PACED POWDERED MATERIAL TO COMPACTED; A HEATING COIL IN COMMUNICATION WITH SOURCE AND ABOUT AND IN A HEAT EXCHANGE RELATIONSHIP WITH THE POWDERED MATERIAL IN THE MOLD CAVITY; MEANS TO COMPACT THE POWDERED MATERIAL IN THE MOLD; AND MEANS TO VARY THE LENGTH OF THE HEATING COIL IN HEAT EXCHANGE RELATIONSHIP WITH COMPACTION OF THE MATERIAL WHEREBY UNEVEN HEAT DISTRIBUTION DURINGCOMPACTION IS REDUCED.
Claim 2
Dependent Claim
85 words
A HOT PRESSING APPARATUS WHICH INCLUDES: A SOURCE OF ENERGY; A MOLD CHARACTERIZEDBY AN INTERNAL MOLD CAVITY CAPABLE OF CONTAINING A LOOSELY PACED POWDERED MATERIAL TO COMPACTED; A HEATING COIL IN COMMUNICATION WITH SOURCE AND ABOUT AND IN A HEAT EXCHANGE RELATIONSHIP WITH THE POWDERED MATERIAL IN THE MOLD CAVITY; MEANS TO COMPACT THE POWDERED MATERIAL IN THE MOLD; AND MEANS TO VARY THE LENGTH OF THE HEATING COIL IN HEAT EXCHANGE RELATIONSHIP WITH COMPACTION OF THE MATERIAL WHEREBY UNEVEN HEAT DISTRIBUTION DURINGCOMPACTION IS REDUCED.
Claim 3
Dependent Claim
89 words
IN A METHOD OF FORMING A COMPACTED SINTERED ARTICLE WHICH INCLUDES THE STEPS OF COMPACTING IN A MOLD CAVITY A MASS COMPRISING ELECTRICALLY CONDUCTIVE PARTICLES AND SINTERING SAID PARTICLES DURING COMPACTING BY HIGHFREQUENCY ELECTRICAL ENERGY FROM A COIL PLACED IN AN INDUCTIVE RELATIONSHIP WITH THE MASS OF PARTICLES THE IMPROVEMENT WHICH COMPRISES: MAINTAINING A SUBSTANTIALLY CONSTANT INDUCTIVE RELATIONSHIP BETWEEN THE COIL AND THE MASS OF PARTICLES DURING THE COMPACTION AND SINTERING BY VARYING THE FORM OF THE COIL THEREBY PROMOTING MORE EVEN HEAT DISTRIBUTION WITHIN THE COMPACTED SINTERED ARTICLE.
Claim 4
Dependent Claim
89 words
IN A METHOD OF FORMING A COMPACTED SINTERED ARTICLE WHICH INCLUDES THE STEPS OF COMPACTING IN A MOLD CAVITY A MASS COMPRISING ELECTRICALLY CONDUCTIVE PARTICLES AND SINTERING SAID PARTICLES DURING COMPACTING BY HIGHFREQUENCY ELECTRICAL ENERGY FROM A COIL PLACED IN AN INDUCTIVE RELATIONSHIP WITH THE MASS OF PARTICLES THE IMPROVEMENT WHICH COMPRISES: MAINTAINING A SUBSTANTIALLY CONSTANT INDUCTIVE RELATIONSHIP BETWEEN THE COIL AND THE MASS OF PARTICLES DURING THE COMPACTION AND SINTERING BY VARYING THE FORM OF THE COIL THEREBY PROMOTING MORE EVEN HEAT DISTRIBUTION WITHIN THE COMPACTED SINTERED ARTICLE.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |