US2760041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot welding apparatus
Assignee: RADIO FREQUENCY LAB Inc
•
Filing: 1954-02-08
•
Granted: 1956-08-21
•
Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 William A Yonkers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:41
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1086041A
Cited
US1084083A
Cited
US1986512A
Cited
US2148095A
Cited
US2508708A
Cited
US2502887A
Cited
US2295293A
Cited
US2462458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |