Patent US3798078A successfully refreshed from Google Patents.
US3798078A
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Welding substance and method of making same
Assignee: Messer Griesheim GmbH
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Filing: 1971-10-12
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Granted: 1974-03-19
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Expires: 1991-10-12
Abstract
Abstract A welding substance such as a submerged arc-welding powder, powdered welding flux, electrode-coating flux and welding assist, and welding-rod core material, is made at least in part from a hydraulic cement or cement clinker after calcination thereof. The cement or cement clinker (cement precursor) can be used in an amount ranging between 5 and 90 percent by weight of the weldingassist composition, preferably 35 - 65 percent by weight, in a particle size below 2.5 mm. The composition is preferably fired at a temperature between 400* to 1,000*C to ensure complete removal of water of crystallization.
Inventors
- 👤 K Lettner
- 👤 J Finkenauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:12
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/361; B23K35/3607; B23K35/362; B23K35/365; B23K35/368
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
A welding powder consisting of about 50.4 percent by weight high-alumina cement, 29.8 percent by weight pyrolusite, 9.8 percent by weight of quartz sand and 10.0 percent by weight fluorspar, the cement being present in a particle size below 2.5 mm.
Claim 2
Dependent Claim
41 words
An electrode-coating composition consisting essentially of substantially 41.5 percent by weight blast-furnace cement, 44.5 percent by weight nytile, 9.1 percent by weight pyrolusite and 4.9 percent by weight quartz sand, and cement being present in a particle size below 2.5 mm.
Claim 3
Dependent Claim
41 words
A welding-rod filler consisting essentially of substantially 58.3 percent by weight portland cement, 29.2 percent by weight fluorspar, 2.4 percent by weight pyrolusite and 10.1 percent by weight ferromanganese and silicomanganese, the cement being present in a particle below 2.5 mm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |