US2551501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vaporizer for fuel gases
Assignee: John E Mitchell Co
•
Filing: 1946-12-19
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Granted: 1951-05-01
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Expires: 1966-12-19
Abstract
No abstract record available.
Inventors
- 👤 Mitchell Orville
- 👤 Jr William P Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:57
CPC Classifications
F; F17; F17C; F17C7/00; F17C7/02; F17C7/04; F23; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/22; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/0119; F17C2201/03; F17C2201/035; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/018; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0329; F17C2205/0338; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; F17C2223/04; F17C2223/042; F17C2223/046; F17C2223/047; F17C2225/00; F17C2225/01; F17C2225/0107; F17C2225/0123; F17C2227/00; F17C2227/03; F17C2227/0302; F17C2227/0332; F17C2227/0367; F17C2227/0388; F17C2227/0393; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0408; F17C2250/0413; F17C2250/06; F17C2250/0605; F17C2250/061; F17C2250/0636; F17C2250/07; F17C2250/072; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/6416; Y10T137/6443; Y10T137/6851; Y10T137/7039; Y10T137/7287; Y10T137/7297; Y10T137/7358; Y10T137/7365; Y10T137/8593; Y10T137/86187; Y10T137/86196; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
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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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |