US3303066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder metallurgy age hardenable alloys
Assignee: Burgess Norton Manufacturing Co Inc
•
Filing: 1966-04-22
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Granted: 1967-02-07
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Sherwood W Mcgee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:38
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
THE METHOD OF PRODUCING AN ALLOY WHICH COMPRISES THE STEPS OF MIXING METALLIC POWDERS OF THE FOLLOWING METALS IN THE PROPORTIONS STATED, APPROXIMATELY 18% NIK APPROXIMATELY 8% CO, APPROXIMATELY 0.5% TI, APPROXIMATELY 4% MO, APPROXIMATELY 70% FE; MIXING THE METALLIC POWDERS, ADDIGN APPROXIMATRELY 1% BY WEIGHT STEARIC ACID LUBRICANT; COMPACTING THE MIXTURE OF METALLIC POWDERS AND ACID AND FORMING A COLD BONDED COMPACT MASS ON THE ORDER OF 6.5 TO 7.5 GM./CC.; SINTERING THE COMPACTED MASS FOR APPROXIMATELY ONE-HALF TO TWO HOUS AT A TEMPERATURE OF APPROXIMATELY 2100*F. UNDER AN ATMOSPHERE OF DISSOCIATED AMMONIA; THEREAFTER REHEATING THE MASS AT A TEMPERATURE OF 1500*F. FOR APPROXIMATELY ONE HOUR UNDER AN ATMOSPHERE OF DISSOCIATED AMMONIA; THEREAFTER COOLING THE MASS AT ROOM TEMPERATUREAT THE APPROXIAMTE RATE OF 100*F. PER HOUR; AND FIANLLY AGE HARDENING THE MASS BY REHEATING IT AT A TEMPERATURE OF APPROXIMATELY 900*F. AND MAINTAINING IT AT THAT TEMPERATURE FOR ABOUT THREE HOURS UNDER A LAYER OF LOOSE IRON POWDER.
Claim 2
Independent Claim
159 words
THE METHOD OF PRODUCING AN ALLOY WHICH COMPRISES THE STEPS OF MIXING METALLIC POWDERS OF THE FOLLOWING METALS IN THE PROPORTIONS STATED, APPROXIMATELY 18% NIK APPROXIMATELY 8% CO, APPROXIMATELY 0.5% TI, APPROXIMATELY 4% MO, APPROXIMATELY 70% FE; MIXING THE METALLIC POWDERS, ADDIGN APPROXIMATRELY 1% BY WEIGHT STEARIC ACID LUBRICANT; COMPACTING THE MIXTURE OF METALLIC POWDERS AND ACID AND FORMING A COLD BONDED COMPACT MASS ON THE ORDER OF 6.5 TO 7.5 GM./CC.; SINTERING THE COMPACTED MASS FOR APPROXIMATELY ONE-HALF TO TWO HOUS AT A TEMPERATURE OF APPROXIMATELY 2100*F. UNDER AN ATMOSPHERE OF DISSOCIATED AMMONIA; THEREAFTER REHEATING THE MASS AT A TEMPERATURE OF 1500*F. FOR APPROXIMATELY ONE HOUR UNDER AN ATMOSPHERE OF DISSOCIATED AMMONIA; THEREAFTER COOLING THE MASS AT ROOM TEMPERATUREAT THE APPROXIAMTE RATE OF 100*F. PER HOUR; AND FIANLLY AGE HARDENING THE MASS BY REHEATING IT AT A TEMPERATURE OF APPROXIMATELY 900*F. AND MAINTAINING IT AT THAT TEMPERATURE FOR ABOUT THREE HOURS UNDER A LAYER OF LOOSE IRON POWDER.
References Cited (Backward Citations)
US3093519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |