US2666835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance welding process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1951-07-24
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Granted: 1954-01-19
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Expires: 1971-07-24
Abstract
No abstract record available.
Inventors
- 👤 Albert J Elleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR THE ELECTRIC RESISTANCE WELDING OF PROTECTIVELY PRECOATED METAL PARTS IN WHICH THE COATING IS DRY WHICH COMPRISES REDUCING THE ELECTRICAL RESISTANCE OF THE COATING BY INCORPORATING IN INTIMATE ADMIXTURE IN THE COATING COMPOSITION A NON-OXIDIZED MAGNETIC METAL POWDER, PRESSING THE SAID COATED METAL PARTS TOGETHER TO PROVIDE A CONTACT AREA AND PASSING AN ELECTRIC CURRENT THROUGH THE AREA OF CONTACT.
Claim 2
Dependent Claim
63 words
A PROCESS FOR THE ELECTRIC RESISTANCE WELDING OF PROTECTIVELY PRECOATED METAL PARTS IN WHICH THE COATING IS DRY WHICH COMPRISES REDUCING THE ELECTRICAL RESISTANCE OF THE COATING BY INCORPORATING IN INTIMATE ADMIXTURE IN THE COATING COMPOSITION A NON-OXIDIZED MAGNETIC METAL POWDER, PRESSING THE SAID COATED METAL PARTS TOGETHER TO PROVIDE A CONTACT AREA AND PASSING AN ELECTRIC CURRENT THROUGH THE AREA OF CONTACT.
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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |