US4436563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flux for overlay welding
Assignee: Kobe Steel Ltd
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Filing: 1982-07-21
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Granted: 1984-03-13
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Expires: 2002-07-21
Abstract
Abstract A flux for overlay welding, essentially containing by weight 30-70% of CaF 2 , 10-30% of Al 2 O 3 , 1-15% of CaO, 5-25% of SiO 2 and 5-25% of MgO such that the total amount of CaF 2 , Al 2 O 3 , CaO, SiO 2 and MgO is greater than 70%, while satisfying the conditions of MgO/(Al 2 O 3 +SiO 2 )≧0.20, MgO/SiO 2 ≦2.0 and MgO/Al 2 O 3 ≦2.0.
Inventors
- 👤 Osamu Tanaka
- 👤 Kazuhiro Takeba
- 👤 Hiroshi Saita
- 👤 Yukinobu Matsushita
- 👤 Koji Koyabu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:30
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/3603; B23K35/3605; B23K35/362
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
A flux for overlay welding comprising in weight percent: 30-70% of CaF 2 , 10-30% of Al 2 O 3 , 1-15% of CaO, 5-25% of SiO 2 , and 5-25% of MgO, wherein the total amount of CaF 2 , Al 2 O 3 , CaO, SiO 2 and MgO is greater than 70%, and wherein the ratio of MgO/(Al 2 O 3 +SiO 2 )≧0.20.
Claim 2
Dependent Claim
67 words
A flux for overlay welding comprising in weight percent: 30-70% of CaF 2 , 10-30% of Al 2 O 3 , 1-15% of CaO, 5-25% of SiO 2 , and 5-25% of MgO, wherein the total amount of CaF 2 , Al 2 O 3 , CaO, SiO 2 and MgO is greater than 70%, and wherein the ratio of MgO/(Al 2 O 3 +SiO 2 )≧0.20.
Claim 3
Dependent Claim
14 words
A flux as claimed in claim 1, wherein the ratio of MgO/SiO 2 ≦2.0.
Claim 4
Dependent Claim
16 words
A flux as claimed in claim 1, wherein the ratio of MgO/Al 2 O 3 ≦2.0.
References Cited (Backward Citations)
US3580748A
Cited
US3704744A
Cited
US3932200A
Cited
US3959031A
Cited
US4066478A
Cited
US4207121A
Cited
US4338142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |