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US3142539A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for artificial synthesis of diamonds

Assignee: North American Aviation Corp
•
Filing: 1960-07-01
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Granted: 1964-07-28
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Expires: 1980-07-01
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Abstract

No abstract record available.

Inventors

  • 👤 John A Brinkman
  • 👤 Charles J Meechan
  • 👤 Herman M Dieckamp

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 13:46
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/02; C30B29/04; C01; C01B; C01B32/00; C01B32/25; C01B32/26; C30B23/00; C30B9/00; C30B9/04; C30B9/08; C30B9/10

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 156 words
A METHOD FOR THE ARTIFICIAL PRODUCTION OF DIAMONDS WHICH COMPRISES CIRCULATING A SOLUTION OF CARBON IN A MOLTEN METAL SELECTED FROM THE GROUP CONSISTING OF LEAD, COPPER, ALUMINUM, BISMUTH, GOLD, SILVER, SNTIMONY, TIN, GALLIUM, INDIUM, AND GERMANIUM UNDER AN INERT ATMOSPHERE IN A REACTION ZONE HAVING A HOTTER REGION AT A TEMPERATURE LESS THAN ABOUT 3000*C. AND A COOLER REGION AT A TEMPERATURE HIGHER THAN ABOUT 1000*C., AND CONTAINING A SEED DIAMOND IN SAID COOLER REGION, WHEREIN SAID MOLTEN METAL IS SATURATED WITH CARBON WITH RESPECT TO GRAPHITE PRECIPITATION IN SAID HOTTER REGION AND SUPERSATURATED WITH CARBON WITH RESPECT TO GRAPHITE PRECIPITATION IN SAID COOLER REGION, AND WHEREIN THE TEMPERATURE DIFFERENTIAL BETWEEN SAID HOTTER REGION AND SAID COOLER REGION IS OF A MAGNITUDE WHICH PROVIDES A SUPERSATURATION OF CARBON WITH RESPECT TO GRAPHITE PRECIPITATION IN SAID COLLER REGION IN AN AMOUNT SUFFICIENT TO EXCEED THE SOLUBILITY LIMIT OF DIAMOND, THEREBY PRODUCING GROWTH OF OF SEED DIAMOND.

References Cited (Backward Citations)

US1637291A Cited
US2675303A Cited
US2996763A Cited
US3030188A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1967-07-28 1968-01-27 1968-07-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1971-07-28 1972-01-27 1972-07-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1975-07-28 1976-01-27 1976-07-28 $7700.00 Window Closed / Lapsed

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