US2928733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintering of metal elements
Assignee: Purolator Products Inc
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Filing: 1957-06-21
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Granted: 1960-03-15
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Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 Frank C Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:09
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/1017; B22F3/1021; B22F2201/00; B22F2201/01; Y; Y10; Y10S; Y10S55/00; Y10S55/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A PROCESS OF PREPARING A SINTERED METAL ELEMENT FROM A "GREEN" UNIT OF EXTRUDED METAL POWER-ORGANIC BINDER MIX, THE STEPS COMPRISING SUPPORTING THE "GREEN" UNIT IN REFRACTORY ALUMINA POWDER AND EFFECTING FIRST STAGE SINTERING OF THE POWDER SUPPORTED UNIT AT A TEMPERATURE OF APPROXIMATELY 400*C. IN AN ATMOSPHERE OF DRY HYDROGEN WHOSE DEW POINT RANGES FROM 0* TO -10*F. DURING WHICH THE ORGAIC BINDER IS BURNED OFF, THEN REMOVING THE UNIT FROM THE ALUMINA POWDER SUPPORT, RIDDING IT OF CLINGING ALUMINA POWDER AND THEREAFTER EFFECTING SECOND STAGE SINTERING OF THE UNSUPPORTED UNIT AT A TEMPERATURE OF ABOUT 1230*C. IN AN ATMOSPHERE OF
Claim 2
Dependent Claim
103 words
IN A PROCESS OF PREPARING A SINTERED METAL ELEMENT FROM A "GREEN" UNIT OF EXTRUDED METAL POWER-ORGANIC BINDER MIX, THE STEPS COMPRISING SUPPORTING THE "GREEN" UNIT IN REFRACTORY ALUMINA POWDER AND EFFECTING FIRST STAGE SINTERING OF THE POWDER SUPPORTED UNIT AT A TEMPERATURE OF APPROXIMATELY 400*C. IN AN ATMOSPHERE OF DRY HYDROGEN WHOSE DEW POINT RANGES FROM 0* TO -10*F. DURING WHICH THE ORGAIC BINDER IS BURNED OFF, THEN REMOVING THE UNIT FROM THE ALUMINA POWDER SUPPORT, RIDDING IT OF CLINGING ALUMINA POWDER AND THEREAFTER EFFECTING SECOND STAGE SINTERING OF THE UNSUPPORTED UNIT AT A TEMPERATURE OF ABOUT 1230*C. IN AN ATMOSPHERE OF
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |