Patent US1278207A successfully refreshed from Google Patents.
Patent US3714332A successfully refreshed from Google Patents.
US3714332A
Expired / Lapsed
US
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Process for making diamonds
Assignee: National Aeronautics and Space Administration
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Filing: 1971-04-21
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Granted: 1973-01-30
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Expires: 1991-04-21
Abstract
Abstract Apparatus and process for the production of diamond is disclosed. The apparatus includes an exponential horn tapering from a large end to a small end. A copper plate is mounted against the large end of the horn and a magnetic hammer abuts the copper plate. The magnetic hammer and copper plate function to create a shock wave in the exponential horn. An anvil having a small pocket formed therein is mounted adjacent to the small end of the exponential horn so that the small end rests in the pocket. The anvil, horn and hammer are all secured together by bolts or other suitable means and, in operation, graphite is placed in the anvil pocket. The magnetic hammer generates a shock wave in the exponential horn and because of the horn shape, which is critical, the velocity of the shock wave is amplified and the shock wave energy concentrated so that all of the energy in the shock wave arrives simultaneously at the small end of the horn. This energy is transferred to the graphite in the anvil pocket and results in pressure and temperature levels that causes the graphite to be transformed, in part at least, to diamonds.
Inventors
- 👤 J Rasquin
- 👤 M Estes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:36
CPC Classifications
B; B30; B30B; B30B13/00; B01; B01J; B01J3/00; B01J3/06; B01J3/08; B30B1/00; B30B1/42; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/061; B01J2203/065; B01J2203/0655; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1092
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
A method of making diamonds comprising the steps of: confining a predetermined amount of pure graphite in a pocket in an anvil, and directing a pressure front into the graphite by positioning an exponential horn having a large end and a small end, the shape of said horn being determined by the equation y ceax, so that the small end of the horn is in contact with the graphite and generating a shock wave in the large end of the horn that is velocity amplified and concentrated so that all of the energy in the shock wave arrives simultaneously at the end of the horn in contact with the graphite whereby a pressure front is transferred to the graphite that compresses and heats the graphite to a level that promotes the formation of diamonds.
Claim 2
Independent Claim
134 words
A method of making diamonds comprising the steps of: confining a predetermined amount of pure graphite in a pocket in an anvil, and directing a pressure front into the graphite by positioning an exponential horn having a large end and a small end, the shape of said horn being determined by the equation y ceax, so that the small end of the horn is in contact with the graphite and generating a shock wave in the large end of the horn that is velocity amplified and concentrated so that all of the energy in the shock wave arrives simultaneously at the end of the horn in contact with the graphite whereby a pressure front is transferred to the graphite that compresses and heats the graphite to a level that promotes the formation of diamonds.
Claim 3
Dependent Claim
24 words
The method recited in claim 1 which further includes the step of actuating a magnetic hammer to generate the shock wave in the horn.
Claim 4
Independent Claim
147 words
A method of synthesizing diamonds from graphite comprising the step of: confining a quantity of graphite in a pocket in an anvil, positioning a tapered exponential horn having a large end and a small end, the shape of said horn being determined by the equation y ceax, so that the small end thereof contacts the graphite, generating a first shock wave in the large end of the horn that travels through the horn and is velocity amplified and concentrated thereby to transmit a pressure front to the graphite for settling the graphite in the anvil pocket, generating a second and more intense shock wave in the large end of the horn that travels through the horn and is velocity amplified and concentrated thereby to transmit a second pressure front to the graphite that compresses and heats the graphite to a level that promotes the formation of diamonds.
Claim 5
Independent Claim
147 words
A method of synthesizing diamonds from graphite comprising the step of: confining a quantity of graphite in a pocket in an anvil, positioning a tapered exponential horn having a large end and a small end, the shape of said horn being determined by the equation y ceax, so that the small end thereof contacts the graphite, generating a first shock wave in the large end of the horn that travels through the horn and is velocity amplified and concentrated thereby to transmit a pressure front to the graphite for settling the graphite in the anvil pocket, generating a second and more intense shock wave in the large end of the horn that travels through the horn and is velocity amplified and concentrated thereby to transmit a second pressure front to the graphite that compresses and heats the graphite to a level that promotes the formation of diamonds.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |