US2815437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance welding machine
Assignee: Armco Inc
•
Filing: 1955-10-12
•
Granted: 1957-12-03
•
Expires: 1975-10-12
Abstract
No abstract record available.
Inventors
- 👤 Reed Eo
- 👤 James C Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:03
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/06; B23K11/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE16804E
Cited
US1215964A
Cited
US1904112A
Cited
US2013517A
Cited
US2023086A
Cited
US2147868A
Cited
US2412648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |