US2248731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas mixer
Assignee: Oxweld Acetylene Co
•
Filing: 1937-08-04
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Granted: 1941-07-08
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Expires: 1957-08-04
Abstract
No abstract record available.
Inventors
- 👤 Lloyd W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/465; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1472; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7881; Y10T137/7882; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87643
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-07-07 | 1945-01-06 | 1945-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-07 | 1949-01-06 | 1949-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-07 | 1953-01-06 | 1953-07-08 | $7700.00 | Window Closed / Lapsed |