US2530969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding clamp
Assignee: WESTFIELD METAL PRODUCTS CO IN
•
Filing: 1948-07-21
•
Granted: 1950-11-21
•
Expires: 1968-07-21
Abstract
No abstract record available.
Inventors
- 👤 Effie B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:45
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04; B23K37/0426; B23K37/0435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US801222A
Cited
US883869A
Cited
US1884144A
Cited
US2175974A
Cited
US2308340A
Cited
US2363828A
Cited
US2414874A
Cited
US2381584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |