US4083718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bismuth-tin-indium-lead alloy
Assignee: Toshiba Corp
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Filing: 1976-03-19
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Granted: 1978-04-11
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Expires: 1996-03-19
Abstract
Abstract Disclosed is a bismuth-tin-indium-lead alloy consisting essentially of 28 to 72 weight % of bismuth, 25 to 52 weight % of tin, 2 to 12 weight % of indium and 1 to 8 weight % of lead. This alloy has excellent sealing property and oxidation resistance, and is suitable particularly to the use as a seal material for a rotating plug of a nuclear reactor.
Inventors
- 👤 Hideki Murabayashi
- 👤 Katsuhiko Kawakita
- 👤 Kisaku Nakamura
- 👤 Sadao Kobatake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:21
CPC Classifications
C; C22; C22C; C22C12/00; C22C13/00; C22C13/02; G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; G21C13/073; G21C13/0735; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
A low melting point, sealing alloy of bismuth, tin, indium and lead which consists essentially of 27 to 72 weight percent bismuth, 25 to 52 weight percent tin, 2 to 12 weight percent indium and 1 to 8 weight percent lead, said alloy being substantially resistant to atmospheric oxidation at temperatures up to 150° C.
Claim 2
Dependent Claim
55 words
A low melting point, sealing alloy of bismuth, tin, indium and lead which consists essentially of 27 to 72 weight percent bismuth, 25 to 52 weight percent tin, 2 to 12 weight percent indium and 1 to 8 weight percent lead, said alloy being substantially resistant to atmospheric oxidation at temperatures up to 150° C.
Claim 3
Dependent Claim
37 words
An alloy of bismuth, tin, indium and lead which consists essentially of 31 to 72 weight percent bismuth, 25 to 52 weight percent tin, 2 to 12 weight percent indium and 1 to 5 weight percent lead.
Claim 4
Dependent Claim
37 words
An alloy of bismuth, tin, indium and lead which consists essentially of 31 to 72 weight percent bismuth, 25 to 52 weight percent tin, 2 to 12 weight percent indium and 1 to 5 weight percent lead.
References Cited (Backward Citations)
US2117282A
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US2649367A
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US2649368A
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Cited
US3269735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |