US2797300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding
Assignee: Revere Copper and Brass Inc
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Filing: 1955-03-03
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Granted: 1957-06-25
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Lowell H Hawthorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:36
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF WELDING COPPER AND COPPER BASE ALLOYS WHICH COMPRISES ARC MELTING A COPPER WELDING WIRE ANA APPLYING THE METAL AS SO MELTED TO THE JOINT TO BE WELDED, ALL IN A SHIELDING ATMOSPHERE OF INERT GAS SUCH AS ARGON OR HELIUM, AND CAUSING THE MOLTEN WELD METAL TO HAVE SUCH HIGH FLUIDITY AND SUCH LOW SURFACE TENSION AS WILL PERMIT OXIDES AND OTHER FOREIGN INCLUSIONS TO RISE TO AND BREAK THROUGH THE SURFACE OF SUCH MOLTEN WELD METAL BY UTILIZING FOR THE COPPER WELDING WIRE ONE CONTAINING TIN WITHIN THE RANGE OF APPROXIMATELY 0.1 TO 1.5% FOR SECURING SUCH FLUIDITY, AND CONTAINING TITANIUM WITHIN THE RANGE OF APPROXIMATELY 0.05 TO 0.3% FOR SECURING SUCH SURFACE TENSION, WITH THE BALANCE OF THE WIRE ESSENTIALLY ALL COOPER.
Claim 2
Independent Claim
127 words
THE METHOD OF WELDING COPPER AND COPPER BASE ALLOYS WHICH COMPRISES ARC MELTING A COPPER WELDING WIRE ANA APPLYING THE METAL AS SO MELTED TO THE JOINT TO BE WELDED, ALL IN A SHIELDING ATMOSPHERE OF INERT GAS SUCH AS ARGON OR HELIUM, AND CAUSING THE MOLTEN WELD METAL TO HAVE SUCH HIGH FLUIDITY AND SUCH LOW SURFACE TENSION AS WILL PERMIT OXIDES AND OTHER FOREIGN INCLUSIONS TO RISE TO AND BREAK THROUGH THE SURFACE OF SUCH MOLTEN WELD METAL BY UTILIZING FOR THE COPPER WELDING WIRE ONE CONTAINING TIN WITHIN THE RANGE OF APPROXIMATELY 0.1 TO 1.5% FOR SECURING SUCH FLUIDITY, AND CONTAINING TITANIUM WITHIN THE RANGE OF APPROXIMATELY 0.05 TO 0.3% FOR SECURING SUCH SURFACE TENSION, WITH THE BALANCE OF THE WIRE ESSENTIALLY ALL COOPER.
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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |