US4309489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fe-Ni-Cu-Cr Layered bimetal
Assignee: Toshiba Corp
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Filing: 1980-05-14
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Granted: 1982-01-05
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Expires: 2000-05-14
Abstract
Abstract There are provided a low expansion alloy having a high corrosion resistance which consists essentially of 25-50% by weight of Ni, 1-25% by weight of Cu and optionally up to 20% by weight of Cr and the balance of essentially Fe with a small amount of impurities, and a corrosion resistant bimetal formed by applying together a low expansion alloy plate which consists essentially of 25-50% by weight of Ni, 1-25% by weight of Cu and optionally up to 20% by weight of Cr and the balance of essentially Fe, and a corrosion resistant alloy plate which has a linear expansion coefficient larger than that of said low expansion alloy plate by 5×10 -6 ° C.
Inventors
- 👤 Kenichiro Momose
- 👤 Kiyoshi Kumagai
- 👤 Fumio Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:33
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/08; C22C38/18; C22C38/20; G; G01; G01K; G01K5/00; G01K5/48; G01K5/56; G01K5/62; G01K5/64; G01K5/66; H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H2037/526; H01H2037/528; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/125; Y10T428/12521; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A corrosion resistant bimetal formed by applying together a low expansion alloy plate which consists essentially of 25-45% by weight of Ni, 2-20% by weight of Cu, 3-20% by weight of Cr and the balance of Fe, and a corrosion resistant alloy plate which has a linear expansion coefficient larger than that of said low expansion alloy plate by 5×10 -6 /°C.
Claim 2
Dependent Claim
62 words
A corrosion resistant bimetal formed by applying together a low expansion alloy plate which consists essentially of 25-45% by weight of Ni, 2-20% by weight of Cu, 3-20% by weight of Cr and the balance of Fe, and a corrosion resistant alloy plate which has a linear expansion coefficient larger than that of said low expansion alloy plate by 5×10 -6 /°C.
Claim 3
Dependent Claim
33 words
A bimetal as claimed in claim 1, wherein said low expansion alloy plate consists essentially of 28-40% by weight Ni, 2-20% by weight Cu, 5-15% by weight Cr, and the balance of Fe.
Claim 4
Dependent Claim
33 words
A bimetal as claimed in claim 1, wherein said low expansion alloy plate consists essentially of 30-36% by weight Ni, 5-16% by weight Cu, 6-12% by weight Cr, and the balance of Fe.
References Cited (Backward Citations)
US965871A
Cited
US1016549A
Cited
US1660246A
Cited
US1481021A
Cited
US1723215A
Cited
US1803353A
Cited
US1805049A
Cited
US1757178A
Cited
US2968548A
Cited
US4131494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |