US2442448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric welding device
Assignee: LATHROP HOGE CONSTRUCTION COMP
•
Filing: 1944-04-22
•
Granted: 1948-06-01
•
Expires: 1964-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robert F Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:00
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1050827A
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US1242171A
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US1527797A
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US1703541A
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US1863850A
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US1934780A
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US1995001A
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US2018263A
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US2343998A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |