US2638525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding stud and method of arc welding
Assignee: National Cylinder Gas Co
•
Filing: 1945-10-30
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Granted: 1953-05-12
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Expires: 1965-10-30
Abstract
No abstract record available.
Inventors
- 👤 Albert M Candy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0255; B23K35/0288; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/472; Y10T403/473; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12229; Y10T428/12271; Y10T428/12333; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |