US3142539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for artificial synthesis of diamonds
Assignee: North American Aviation Corp
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Filing: 1960-07-01
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Granted: 1964-07-28
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Expires: 1980-07-01
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 13:16
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)
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 |