Patent US3138434A successfully refreshed from Google Patents.
US3138434A
Expired / Lapsed
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Deposition method of forming a pyrolytic graphite article
Assignee: General Electric Co
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Filing: 1961-04-26
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Granted: 1964-06-23
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Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 Russell J Diefendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:57
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A DEPOSITION METHOD WHICH COMPRISES PROVIDING AN ENCLOSURE, POSITIONING A MEMBER WITHIN SAID ENCLOSURE, PROVIDING A NARROW, SUBSTANTIALLY UNIFORM DIAMETER PASSAGE BETWEEN SAID MEMBER AND SAID ENCLOSURE THEREBY PROVIDING A NEGLIGIBLE PRESSURE DROP DURING DEPOSITION, EVACUATING SAID PASSAGE, APPLYING A POTENTIAL BETWEEN SAID ENCLOSURE AND SAID MEMBER TO PRODUCE A CONSTANT TEMPERATURE AT THE SURFACE OF SAID ENCLOSSURE AND A CONSTANT TEMPERATURE AT THE SURFACE OF SAID MEMBER, FLOWING A CARBON VAPOR AT A TEMPERATURE IN THE RANGE OF 2000*C. TO 2500*C. THROUGH SAID PASSAGE WHEREBY A PYROLYTIC GRAPHITE ARTICLE IS FORMED ON SAID MEMBER, AND REMOVING SAID ARTICLE FROM SAID MEMBER.
Claim 2
Dependent Claim
102 words
A DEPOSITION METHOD WHICH COMPRISES PROVIDING AN ENCLOSURE, POSITIONING A MEMBER WITHIN SAID ENCLOSURE, PROVIDING A NARROW, SUBSTANTIALLY UNIFORM DIAMETER PASSAGE BETWEEN SAID MEMBER AND SAID ENCLOSURE THEREBY PROVIDING A NEGLIGIBLE PRESSURE DROP DURING DEPOSITION, EVACUATING SAID PASSAGE, APPLYING A POTENTIAL BETWEEN SAID ENCLOSURE AND SAID MEMBER TO PRODUCE A CONSTANT TEMPERATURE AT THE SURFACE OF SAID ENCLOSSURE AND A CONSTANT TEMPERATURE AT THE SURFACE OF SAID MEMBER, FLOWING A CARBON VAPOR AT A TEMPERATURE IN THE RANGE OF 2000*C. TO 2500*C. THROUGH SAID PASSAGE WHEREBY A PYROLYTIC GRAPHITE ARTICLE IS FORMED ON SAID MEMBER, AND REMOVING SAID ARTICLE FROM SAID MEMBER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |