US3196247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for welding aluminum
Assignee: Atomic Energy of Canada Ltd AECL
•
Filing: 1962-12-20
•
Granted: 1965-07-20
•
Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 George R Piercy
- 👤 James A E Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:22
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/16; B23K11/18; B23K35/00; B23K35/22; B23K35/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD FOR RESISTANCE WELDING ALUMINUM AND ALUMINUM ALLOYS COMPRISING IMMERSING THE WELDING SURFACES OF ALUMINUM OBJECTS HAVING AN ALUMINUM OXIDE FILM THEREON IN AN ETCHING SOLUTION TO REMOVE THE OXIDE FROM THE WELDING SURFACES, MAINTAINING THE SURFACES IMMERSED TO PREVENT FURTHER OXIDATION, PRESSING THE SURFACES TOGETHER, AND PASSING A WELDING CURRENT ACROSS THE SURFACES.
Claim 2
Independent Claim
55 words
A METHOD FOR RESISTANCE WELDING ALUMINUM AND ALUMINUM ALLOYS COMPRISING IMMERSING THE WELDING SURFACES OF ALUMINUM OBJECTS HAVING AN ALUMINUM OXIDE FILM THEREON IN AN ETCHING SOLUTION TO REMOVE THE OXIDE FROM THE WELDING SURFACES, MAINTAINING THE SURFACES IMMERSED TO PREVENT FURTHER OXIDATION, PRESSING THE SURFACES TOGETHER, AND PASSING A WELDING CURRENT ACROSS THE SURFACES.
References Cited (Backward Citations)
US1055261A
Cited
US2194573A
Cited
US2681402A
Cited
US2829236A
Cited
US3098928A
Cited
US2977458A
Cited
US2990467A
Cited
US3108176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |