Patent US4338142A successfully refreshed from Google Patents.
US4338142A
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Melting flux composition for submerged arc welding
Assignee: Kobe Steel Ltd
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Filing: 1981-01-19
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Granted: 1982-07-06
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Expires: 2001-01-19
Abstract
Abstract A melting flux composition for submerged arc welding which comprises 6-15% by weight of MgO, 5-10% by weight of CaO, 10-20% by weight of CaF 2 , 14-19% by weight of Al 2 O 3 , 20-25% by weight of TiO 2 , 15-20% by weight of SiO 2 , and 5-10% by weight of MnO. Optionally, the composition further comprises B 2 O 3 or other oxide components, such as iron oxide and alkali metal oxides.
Inventors
- 👤 Naoki Okuda
- 👤 Kazuo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:10
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/3608; B23K35/3602; B23K35/3603; B23K35/3605; B23K35/3607; B23K35/361; B23K35/362
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
A melting flux composition for submerged arc welding comprising 6-15% by weight of MgO, 5-10% by weight of CaO, 10-20% by weight of CaF 2 , 14-19% by weight of Al 2 O 3 , 20-25% by weight of TiO 2 , 15-20% by weight of SiO 2 , and 5-10% by weight of MnO.
Claim 2
Dependent Claim
55 words
A melting flux composition for submerged arc welding comprising 6-15% by weight of MgO, 5-10% by weight of CaO, 10-20% by weight of CaF 2 , 14-19% by weight of Al 2 O 3 , 20-25% by weight of TiO 2 , 15-20% by weight of SiO 2 , and 5-10% by weight of MnO.
Claim 3
Dependent Claim
20 words
A melting flux composition according to claim 1, further comprising about 0.1-1.5% by weight of B 2 O 3 .
Claim 4
Dependent Claim
27 words
A melting flux composition according to claim 1 or 2, further comprising up to 15% by weight of iron oxide and an alkali metal oxide in total.
Claim 5
Dependent Claim
21 words
A melting flux composition according to claim 3, wherein said alkali metal oxide is Na 2 O or K 2 O.
Claim 6
Dependent Claim
68 words
A melting flux according to claim 1, wherein said flux composition is in the form of granules having a size distribution such that granules having sizes greater than 840 microns are present in an amount of less than 5% by weight and granules having sizes smaller than 420 microns are present in an amount of greater than 50% by weight, both amounts based on the total granule composition.
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) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |