US2587840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded article and method of making the same
Assignee: AO Smith Corp
•
Filing: 1945-09-12
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Granted: 1952-03-04
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Expires: 1965-09-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Gruetjen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:26
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2653; B21D51/2661; Y; Y10; Y10S; Y10S220/00; Y10S220/917; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |