US3673051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolytic graphite
Assignee: General Electric Co
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Filing: 1969-03-20
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Granted: 1972-06-27
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Expires: 1989-03-20
Abstract
Abstract Curved pyrolytic graphite bodies of increased thickness-toradius ratios are produced by codepositing with the pyrolytic graphite a refractory metal in progressively decreasing quantities from the outer to the inner surface of the body. The addition of the refractory alloy metal lowers the stress levels and hence permits greater thicknesses of the pyrolytic graphite body.
Inventors
- 👤 Thomas J Clark
- 👤 Howard W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522; C01; C01B; C01B32/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
The pyrolytic graphite body of claim 1 in which the alloy element is boron.
Claim 2
Dependent Claim
20 words
The pyrolytic graphite body of claim 2 in which the boron is present in quantities from 1.5 to 0.01 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |