Patent US3138435A successfully refreshed from Google Patents.
US3138435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposition apparatus and method for forming a pyrolytic graphite article
Assignee: General Electric Co
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Filing: 1961-06-26
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Granted: 1964-06-23
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Russell J Diefendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:22
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 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, 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
72 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, 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 3
Dependent Claim
115 words
A DEPOSITION APPARATUS COMPRISING A CHAMBER, A PREHEATER HAVING A INLET AND OUTLET POSITIONED IN SAID CHAMBER, CARBONACEOUS MATERIAL FEED MEANS CONNECTED TO THE INLET OF SAID PREHEATER, AN ENCLOSURE HAVING AN INLET AND AN OUTLET SUPPORTED ON SAID PREHEATER, SAID ENCLOSURE INLET COMMUNICATING WITH THE OUTLET OF SAID PREHEATER, A MEMBER POSITIONED WITHIN SAID ENCLOSURE, SAID ENCLOSURE AND SAID MEMBER SPACED APART TO PROVIDE A NARROW, SUBSTANTIALLY UNIFORM DIAMETER PASSAGE THEREBETWEEN, SAID ENCLOSURE OUTLET COMMUNICATING WITH SAID CHAMBER, AN INSULATED CYLINDER SURROUNDING AND SPACED FROM SAID ENCLOSURE AND SAID PREHEATER, INSULATION SURROUNDING SAID ENCLOSURE AND SAID PREHEATER WITHIN SAID CYLINDER, HEATING MEANS SURROUNDING SAID CYLINDER, AND MEANS FOR MAINTAINING A PRESSURE IN SAID PASSAGE.
Claim 4
Dependent Claim
115 words
A DEPOSITION APPARATUS COMPRISING A CHAMBER, A PREHEATER HAVING A INLET AND OUTLET POSITIONED IN SAID CHAMBER, CARBONACEOUS MATERIAL FEED MEANS CONNECTED TO THE INLET OF SAID PREHEATER, AN ENCLOSURE HAVING AN INLET AND AN OUTLET SUPPORTED ON SAID PREHEATER, SAID ENCLOSURE INLET COMMUNICATING WITH THE OUTLET OF SAID PREHEATER, A MEMBER POSITIONED WITHIN SAID ENCLOSURE, SAID ENCLOSURE AND SAID MEMBER SPACED APART TO PROVIDE A NARROW, SUBSTANTIALLY UNIFORM DIAMETER PASSAGE THEREBETWEEN, SAID ENCLOSURE OUTLET COMMUNICATING WITH SAID CHAMBER, AN INSULATED CYLINDER SURROUNDING AND SPACED FROM SAID ENCLOSURE AND SAID PREHEATER, INSULATION SURROUNDING SAID ENCLOSURE AND SAID PREHEATER WITHIN SAID CYLINDER, HEATING MEANS SURROUNDING SAID CYLINDER, AND MEANS FOR MAINTAINING A PRESSURE IN SAID PASSAGE.
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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 |