US2839663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Anaconda Co
•
Filing: 1957-03-06
•
Granted: 1958-06-17
•
Expires: 1977-03-06
Abstract
No abstract record available.
Inventors
- 👤 James T Mccollom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:21
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/04; B23K9/044
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1957489A
Cited
US1983321A
Cited
US2191469A
Cited
US2427350A
Cited
US2379531A
Cited
US2592414A
Cited
US2522146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |