US3151971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum vapor condensation process for producing fine metal powders
Assignee: National Research Corp
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Filing: 1961-03-03
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Granted: 1964-10-06
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
- 👤 Philip J Clough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:44
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE PROCESS OF PRODUCING FINE METAL POWDERS COMPRISING VAPORIZING A METAL IN AN INERT ATMOSPHERE AT A PRESSURE LESS THAN ATMOSPHERIC TO FORM A VAPOR STREAM WHICH IS DIRECTED INTO A CONDENSATION ZONE, PASSING A COOLED SURFACE THROUGH SAID CONDENSATION ZONE AND COLLECTING CONDENSED METAL VAPORS ON SAID SURFACE, REMOVING THE COOLED SURFACE, WITH THE POWDER THEREON, FROM SAID CONDENSATION ZONE AT A SUFFICIENTLY FAST RATE TO PREVENT HEATING OF THE CONDENSED POWDER BY THE VAPOR STREAM WHEREBY FURTHER CRYSTAL GROWTH IS IMPEDED, REMOVING THE CONDENSED POWDER FROM SAID SURFACE, COLLECTING THE REMOVED POWDER AND AGAIN INTRODUCING SAID COOLED SURFACE INTO SAID CONDENSATION ZONE.
Claim 2
Dependent Claim
104 words
THE PROCESS OF PRODUCING FINE METAL POWDERS COMPRISING VAPORIZING A METAL IN AN INERT ATMOSPHERE AT A PRESSURE LESS THAN ATMOSPHERIC TO FORM A VAPOR STREAM WHICH IS DIRECTED INTO A CONDENSATION ZONE, PASSING A COOLED SURFACE THROUGH SAID CONDENSATION ZONE AND COLLECTING CONDENSED METAL VAPORS ON SAID SURFACE, REMOVING THE COOLED SURFACE, WITH THE POWDER THEREON, FROM SAID CONDENSATION ZONE AT A SUFFICIENTLY FAST RATE TO PREVENT HEATING OF THE CONDENSED POWDER BY THE VAPOR STREAM WHEREBY FURTHER CRYSTAL GROWTH IS IMPEDED, REMOVING THE CONDENSED POWDER FROM SAID SURFACE, COLLECTING THE REMOVED POWDER AND AGAIN INTRODUCING SAID COOLED SURFACE INTO SAID CONDENSATION ZONE.
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) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |