US2418533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas torch
Assignee: Airco Inc
•
Filing: 1944-01-26
•
Granted: 1947-04-08
•
Expires: 1964-01-26
Abstract
No abstract record available.
Inventors
- 👤 George L Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:57
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US216562A
Cited
US518624A
Cited
DE402400C
Cited
US784101A
Cited
US1535491A
Cited
US1950015A
Cited
US1932321A
Cited
US1957855A
Cited
US2356196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-07 | 1950-10-07 | 1951-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-07 | 1954-10-07 | 1955-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-07 | 1958-10-07 | 1959-04-08 | $7700.00 | Window Closed / Lapsed |