US2509999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article for electric arc welding one metallic workpiece to another
Assignee: Hartford National Bank and Trust Co
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Filing: 1948-03-09
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Granted: 1950-05-30
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Expires: 1968-03-09
Abstract
No abstract record available.
Inventors
- 👤 Willigen Paul Christiaan V Der
- 👤 Boon Simon Dirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:40
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/067; B23K9/0672; B23K9/0677; B23K35/00; B23K35/02; B23K35/0255; B23K35/0288; B23K9/20; B23K9/207; B23K9/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22108E
Cited
US2043960A
Cited
GB497133A
Cited
US2326865A
Cited
US2429175A
Cited
US2370100A
Cited
US2474531A
Cited
US2459957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |