Patent US2436411A successfully refreshed from Google Patents.
US2436411A
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Portable liquid oxygen unit
Assignee: Individual
•
Filing: 1945-12-11
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Granted: 1948-02-24
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Expires: 1965-12-11
Abstract
No abstract record available.
Inventors
- 👤 John A Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:27
CPC Classifications
F; F17; F17C; F17C9/00; F17C9/02; F17C2201/00; F17C2201/01; F17C2201/0128; F17C2201/05; F17C2201/058; F17C2203/00; F17C2203/03; F17C2203/0391; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0332; F17C2205/0335; F17C2205/0338; F17C2209/00; F17C2209/22; F17C2209/228; F17C2221/00; F17C2221/01; F17C2221/011; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; F17C2225/00; F17C2225/01; F17C2225/0107; F17C2225/0123; F17C2225/03; F17C2225/033; F17C2227/00; F17C2227/03; F17C2227/0367; F17C2227/0369; F17C2227/0376; F17C2227/0381; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0408; F17C2250/0421; F17C2250/0426; F17C2250/0486; F17C2250/0495; F17C2270/00; F17C2270/02; F17C2270/025; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6525; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1976688A
Cited
US2344765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |