US3713790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joined body of pyrolytic graphite and metallic members
Assignee: NEC Corp
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Filing: 1969-08-12
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Granted: 1973-01-30
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Expires: 1989-08-12
Abstract
Abstract A method for joining pyrolytic graphite to metallic members by using a brazing composition comprising at least 90 percent by weight of a copper-chromium, gold-chromium, or silver-chromium mixture.
Inventors
- 👤 T Takamori
- 👤 M Akanuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:34
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/32; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/124; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; C04B2237/40; C04B2237/403; C04B2237/407; C04B2237/408; C04B2237/50; C04B2237/72; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12625; Y10T428/12771; Y10T428/12778; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
Silver-chromium alloy wherein the chromium content ranges from 10 to 85 percent by weight of the alloy; and
Claim 2
Dependent Claim
30 words
Gold-chromium alloy wherein the chromium content ranges from 10 to 75 percent by weight; the remainder of the components of said alloy being one or more different kinds of metal.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |