US2947608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond synthesis
Assignee: General Electric Co
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Filing: 1955-08-29
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Granted: 1960-08-02
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Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Hall Howard Tracy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:34
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/06; B01J3/065; B01J3/067; B01J3/062; C; C01; C01B; C01B32/00; C01B32/25; C01B32/26; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/061; B01J2203/0625; B01J2203/065; B01J2203/0655; B01J2203/0675; B01J2203/068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF MAKING DIAMOND WHICH COMPRISES POSITIONING A NICKEL ROD IN A GRAPHITE CYLINDER TO FORM AN ASSEMBLY, SUBJECTING SAID ASSEMBLY TO A PRESSURE OF ABOUT 95,000 ATMOSPHERES, MEASURING CONTINUOUSLY THE ELECTRICAL RESISTANCE OF SAID ASSEMBLY, APPLYING SUFFICIENT HEAT TO SAID ASSEMBLY FOR SUFFICIENT TIME TO CAUSE AN INFLECTION IN THE ELECTRICAL RESISTANCE OF SAID ASSEMBLY, THEREAFTER REDUCING THE PRESSURE AND TERMINATING THE APPLICATION OF HEAT IN RESPONSE TO SAID INFLECTION, AND RECOVERING THE DIAMOND SO FORMED.
Claim 2
Independent Claim
78 words
THE METHOD OF MAKING DIAMOND WHICH COMPRISES POSITIONING A NICKEL ROD IN A GRAPHITE CYLINDER TO FORM AN ASSEMBLY, SUBJECTING SAID ASSEMBLY TO A PRESSURE OF ABOUT 95,000 ATMOSPHERES, MEASURING CONTINUOUSLY THE ELECTRICAL RESISTANCE OF SAID ASSEMBLY, APPLYING SUFFICIENT HEAT TO SAID ASSEMBLY FOR SUFFICIENT TIME TO CAUSE AN INFLECTION IN THE ELECTRICAL RESISTANCE OF SAID ASSEMBLY, THEREAFTER REDUCING THE PRESSURE AND TERMINATING THE APPLICATION OF HEAT IN RESPONSE TO SAID INFLECTION, AND RECOVERING THE DIAMOND SO FORMED.
References Cited (Backward Citations)
GB377239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |