US2454934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical oxygen vaporizer and protecting cover
Assignee: Individual
•
Filing: 1947-01-24
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Granted: 1948-11-30
•
Expires: 1967-01-24
Abstract
No abstract record available.
Inventors
- 👤 John A Mathis
- 👤 Roland W Milan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:04
CPC Classifications
F; F17; F17C; F17C9/00; F17C9/02; F17C2201/00; F17C2201/01; F17C2201/0128; F17C2201/03; F17C2201/032; F17C2203/00; F17C2203/01; F17C2203/014; F17C2203/018; F17C2203/03; F17C2203/0391; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0643; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0329; F17C2205/0332; F17C2221/00; F17C2221/01; F17C2221/011; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2225/00; F17C2225/01; F17C2225/0107; F17C2225/0123; F17C2225/04; F17C2225/042; F17C2225/046; F17C2225/047; F17C2227/00; F17C2227/03; F17C2227/0302; F17C2227/0304; F17C2227/0367; F17C2227/0369; F17C2227/0376; F17C2227/0383; F17C2227/0388; F17C2227/0393; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0408; F17C2250/0413; F17C2250/06; F17C2250/0605; F17C2250/0636; F17C2260/00; F17C2260/02; F17C2260/022; F17C2260/03; F17C2260/035; F17C2260/037; F17C2260/04; F17C2260/042; Y; Y10; Y10S; Y10S220/00; Y10S220/90; Y10S220/901; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6525; Y10T137/6606; Y10T137/6851; Y10T137/7043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |