Patent US2719581A successfully refreshed from Google Patents.
US2719581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding torch
Assignee: Selas Corp of America
•
Filing: 1952-02-13
•
Granted: 1955-10-04
•
Expires: 1972-02-13
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Greathead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:06
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38; F23D14/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1516486A
Cited
US1985080A
Cited
US1930847A
Cited
US2177258A
Cited
US2277472A
Cited
US2414874A
Cited
US2398884A
Cited
US2442437A
Cited
US2443101A
Cited
US2501724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |