Patent US3175885A successfully refreshed from Google Patents.
US3175885A
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Method for artificial synthesis of diamonds
Assignee: North American Aviation Corp
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Filing: 1964-02-12
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Granted: 1965-03-30
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Expires: 1984-02-12
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
2026-10-24 21:26
CPC Classifications
C; C30; C30B; C30B23/00; C30B23/002; C30B23/005; C01; C01B; C01B32/00; C01B32/25; C01B32/26; C30B29/00; C30B29/02; C30B29/04; C30B9/00; C30B9/04; C30B9/08; C30B9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD FOR THE ARTIFICIAL PRODUCTION OF DIAMONDS WHICH COMPRISES CONTACTING A SEED DIAMOND BEING MAINTAINED IN AN INERT ENVIRONMENT REACTION SYSTEM AT A TEMPERATURE OF ABOUT 1273-2073*K. WITH A CARBON ATOM FLUX OBTAINED BY VAPORIZING CARBON ATOMS FROM AN ELEMENTAL CARBON SOURCE WITHIN SAID SYSTEM SUCH THAT THE CRITICAL CONDITION, P=2PG AT T1, IS EXCEEDED, WHEREIN P IS THE CARBON VAPOR PRESSURE IN THE VICINITY OF THE SEED DIAMOND, PG IS THE EQUILIBRIUM VAPOR PRESSURE OF GRAPHITE AT T1, AND T1 IS THE TEMPERATURE AT WHICH THE SEED DIAMOND IS MAINTAINED.
Claim 2
Independent Claim
92 words
A METHOD FOR THE ARTIFICIAL PRODUCTION OF DIAMONDS WHICH COMPRISES CONTACTING A SEED DIAMOND BEING MAINTAINED IN AN INERT ENVIRONMENT REACTION SYSTEM AT A TEMPERATURE OF ABOUT 1273-2073*K. WITH A CARBON ATOM FLUX OBTAINED BY VAPORIZING CARBON ATOMS FROM AN ELEMENTAL CARBON SOURCE WITHIN SAID SYSTEM SUCH THAT THE CRITICAL CONDITION, P=2PG AT T1, IS EXCEEDED, WHEREIN P IS THE CARBON VAPOR PRESSURE IN THE VICINITY OF THE SEED DIAMOND, PG IS THE EQUILIBRIUM VAPOR PRESSURE OF GRAPHITE AT T1, AND T1 IS THE TEMPERATURE AT WHICH THE SEED DIAMOND IS MAINTAINED.
References Cited (Backward Citations)
US3030188A
Cited
US3030187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |