Patent US3840451A successfully refreshed from Google Patents.
US3840451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an artificial diamond film
Assignee: Individual
•
Filing: 1972-10-24
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Granted: 1974-10-08
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Expires: 1992-10-24
Abstract
Abstract 1. A METHOD OF PRODUCING ARTIFICIAL DIAMOND FILMS WHICH COMPRISES SPUTTERING AT LEAST TWO GRAPHITE CATHODES SIMULTANEOUSLY BY IONS OF AN ELECTRIC DISCHARGE IN AN INERT GAS AT A PRESSURE OF ABOUT 10-7 TO 10-4 TORR, TO THEREBY FORM AT LEAST TWO ATOMIC BEAMS OF CARBON, THE INERT GAS PRESSURE BEING MAINTAINED SUCH THAT NEUTRAL CARBON ATOMS EMITTED FROM THE CATHODES REACH THE SUBSTRATE SURFACE WITHOUT COLLIDING WITH THE INERT GAS PARTICLES, SAID ATOMIC BEAMS OF CARBON BEING DEPOSITED ON SAID COMMON SOLID SUBSTRATE WITH OVERLAPPING ON THE SURFACE THEREOF TO THEREBY FORM SAID DIAMOND FILM.
Inventors
- 👤 A Demidov
- 👤 V Golyanov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:29
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0605; C23C14/0611; C01; C01B; C01B32/00; C01B32/25; C01B32/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF PRODUCING ARTIFICIAL DIAMOND FILMS WHICH COMPRISES SPUTTERING AT LEAST TWO GRAPHITE CATHODES SIMULTANEOUSLY BY IONS OF AN ELECTRIC DISCHARGE IN AN INERT GAS AT A PRESSURE OF ABOUT 10-7 TO 10-4 TORR, TO THEREBY FORM AT LEAST TWO ATOMIC BEAMS OF CARBON, THE INERT GAS PRESSURE BEING MAINTAINED SUCH THAT NEUTRAL CARBON ATOMS EMITTED FROM THE CATHODES REACH THE SUBSTRATE SURFACE WITHOUT COLLIDING WITH THE INERT GAS PARTICLES, SAID ATOMIC BEAMS OF CARBON BEING DEPOSITED ON SAID COMMON SOLID SUBSTRATE WITH OVERLAPPING ON THE SURFACE THEREOF TO THEREBY FORM SAID DIAMOND FILM.
Claim 2
Independent Claim
95 words
A METHOD OF PRODUCING ARTIFICIAL DIAMOND FILMS WHICH COMPRISES SPUTTERING AT LEAST TWO GRAPHITE CATHODES SIMULTANEOUSLY BY IONS OF AN ELECTRIC DISCHARGE IN AN INERT GAS AT A PRESSURE OF ABOUT 10-7 TO 10-4 TORR, TO THEREBY FORM AT LEAST TWO ATOMIC BEAMS OF CARBON, THE INERT GAS PRESSURE BEING MAINTAINED SUCH THAT NEUTRAL CARBON ATOMS EMITTED FROM THE CATHODES REACH THE SUBSTRATE SURFACE WITHOUT COLLIDING WITH THE INERT GAS PARTICLES, SAID ATOMIC BEAMS OF CARBON BEING DEPOSITED ON SAID COMMON SOLID SUBSTRATE WITH OVERLAPPING ON THE SURFACE THEREOF TO THEREBY FORM SAID DIAMOND FILM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |