US3851048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing isotropic pyrolytic carbon
Assignee: Kureha Corp
•
Filing: 1972-07-11
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Granted: 1974-11-26
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Expires: 1992-07-11
Abstract
Abstract 1. A PROCESS FOR THE PRODUCTION OF ISOTROPIC PYROLYTIC CARBON WHICH COMPRISES VAPORIZING A MATERIAL HAVING A VAPOR PRESSURE OF AT LEAST 5 MM. HG AT 490*C AND AT LEAST TWO CONDENSED RINGS, BRING THE SAID VAPORIZED MATERIAL INTO CONTACT WITH A PREHEATED SUBSTRATE HETED TO A TEMPERATURE OF 600-1500*C. THEREBY DEPOSITING SAID ISOTROPIC PYROLYTIC CARBON AS A COATING ON SAID SUBSTRATE, AND RAPIDLY COOLING SAID COATED SUBSTRATE AND RECOVERING SAID ISOTROPIC PYROLYTIC CARBON FROM SAID COATED SUBSTRATE.
Inventors
- 👤 H Imaizumi
- 👤 T Araki
- 👤 T Awao
- 👤 K Asano
- 👤 J Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:55
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PRODUCTION OF ISOTROPIC PYROLYTIC CARBON WHICH COMPRISES VAPORIZING A MATERIAL HAVING A VAPOR PRESSURE OF AT LEAST 5 MM. HG AT 490*C AND AT LEAST TWO CONDENSED RINGS, BRING THE SAID VAPORIZED MATERIAL INTO CONTACT WITH A PREHEATED SUBSTRATE HETED TO A TEMPERATURE OF 600-1500*C. THEREBY DEPOSITING SAID ISOTROPIC PYROLYTIC CARBON AS A COATING ON SAID SUBSTRATE, AND RAPIDLY COOLING SAID COATED SUBSTRATE AND RECOVERING SAID ISOTROPIC PYROLYTIC CARBON FROM SAID COATED SUBSTRATE.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PRODUCTION OF ISOTROPIC PYROLYTIC CARBON WHICH COMPRISES VAPORIZING A MATERIAL HAVING A VAPOR PRESSURE OF AT LEAST 5 MM. HG AT 490*C AND AT LEAST TWO CONDENSED RINGS, BRING THE SAID VAPORIZED MATERIAL INTO CONTACT WITH A PREHEATED SUBSTRATE HETED TO A TEMPERATURE OF 600-1500*C. THEREBY DEPOSITING SAID ISOTROPIC PYROLYTIC CARBON AS A COATING ON SAID SUBSTRATE, AND RAPIDLY COOLING SAID COATED SUBSTRATE AND RECOVERING SAID ISOTROPIC PYROLYTIC CARBON FROM SAID COATED SUBSTRATE.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |