US2458758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for resistance welding
Assignee: PROGRESSIVE WELDER Co
•
Filing: 1944-11-06
•
Granted: 1949-01-11
•
Expires: 1964-11-06
Abstract
No abstract record available.
Inventors
- 👤 Edward J Zulinski
- 👤 Barley Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:09
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/248
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2323038A
Cited
US1618764A
Cited
US1902955A
Cited
US2270767A
Cited
US2305042A
Cited
US2363753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |