US2887560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding of seams by high frequency resistance heating
Assignee: Magnetic Heating Corp
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Filing: 1957-01-11
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Granted: 1959-05-19
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Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 Robert J Stanton
- 👤 Wallace C Rudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:16
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/04; B23K13/043
Claims Analysis
Total Claims: 0
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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) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |