Patent US3260596A successfully refreshed from Google Patents.
US3260596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming powdered metal into sintered hollow bodies
Assignee: Materion Brush Inc
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Filing: 1965-04-12
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Granted: 1966-07-12
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Expires: 1985-04-12
Abstract
No abstract record available.
Inventors
- 👤 David D Rapprich
- 👤 Francis J Holewinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:03
CPC Classifications
B; B22; B22F; B22F5/00; B22F5/10; B22F2998/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A METHOD OF FORMING METAL POWDER INTO ELONGATED HOLLOW BODIES, SAID METHOD COMPRISING CONFINING A CHARGE OF METAL POWDER TO BE FORMED IN AN ANNULAR CAVITY OF PREDETERMINED SHAPE SEALED AT ONE END, APPLYING MECHANICAL PRESSURE TO THE OTHER END OF THE CHARGE IN A DIRECTION TOWARD THE ONE END WHILE HOLDING THE OPPOSITE END IN FIXED POSITION FOR PRELIMINARILY COMPACTING THE POWDER, WHILE COMPLETELY CONFINING THE CHARGE IN THE CAVITY AT SAID ONE END, SUBJECTING THE POWDER TO A SUB-ATMOSPHERIC PRESSURE DURING SAID PRELIMINARY COMPACTION, GRADUALLY HEATING THE POWDER TO A TEMPERATURE UP TO THE SINTERING RANGE WHILE MAINTAINING SAID PRELIMINARY COMPACTION AND SUB-ATMOSPHIERIC PRESSURE, AND THE, WHEN THE POWDER REACHES THE SINTERING TEMPERATURE RANGE, GRADUALLY INCREASING THE TEMPERATURE AND INCREASING SAID MECHANICAL PRESSURE ON SAID OTHER END OF THE CHARGE, AND CONCURRENTLY CHANGING THE SIZE AND SHAPE OF THE CAVITY AND BREAKING THE SEAL FOR COMPACTING THE SINTERING MATERIAL TO A PREDETERMINED SINTERED DENSITY WHILE MAINTAINING SAID SUBATMOSPHERIC PRESSURE.
Claim 2
Independent Claim
161 words
A METHOD OF FORMING METAL POWDER INTO ELONGATED HOLLOW BODIES, SAID METHOD COMPRISING CONFINING A CHARGE OF METAL POWDER TO BE FORMED IN AN ANNULAR CAVITY OF PREDETERMINED SHAPE SEALED AT ONE END, APPLYING MECHANICAL PRESSURE TO THE OTHER END OF THE CHARGE IN A DIRECTION TOWARD THE ONE END WHILE HOLDING THE OPPOSITE END IN FIXED POSITION FOR PRELIMINARILY COMPACTING THE POWDER, WHILE COMPLETELY CONFINING THE CHARGE IN THE CAVITY AT SAID ONE END, SUBJECTING THE POWDER TO A SUB-ATMOSPHERIC PRESSURE DURING SAID PRELIMINARY COMPACTION, GRADUALLY HEATING THE POWDER TO A TEMPERATURE UP TO THE SINTERING RANGE WHILE MAINTAINING SAID PRELIMINARY COMPACTION AND SUB-ATMOSPHIERIC PRESSURE, AND THE, WHEN THE POWDER REACHES THE SINTERING TEMPERATURE RANGE, GRADUALLY INCREASING THE TEMPERATURE AND INCREASING SAID MECHANICAL PRESSURE ON SAID OTHER END OF THE CHARGE, AND CONCURRENTLY CHANGING THE SIZE AND SHAPE OF THE CAVITY AND BREAKING THE SEAL FOR COMPACTING THE SINTERING MATERIAL TO A PREDETERMINED SINTERED DENSITY WHILE MAINTAINING SAID SUBATMOSPHERIC PRESSURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |