US2440738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquefied gas extractor
Assignee: Individual
•
Filing: 1945-08-18
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Granted: 1948-05-04
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Expires: 1965-08-18
Abstract
No abstract record available.
Inventors
- 👤 Howell C Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
F; F17; F17C; F17C9/00; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2225/00; F17C2225/01; F17C2225/0107; F17C2225/0123; F17C2227/00; F17C2227/01; F17C2227/0107; F17C2227/0121; F17C2227/0128; F17C2227/0135; F17C2227/0157; F17C2227/03; F17C2227/0337; F17C2227/0339; F17C2227/0367; F17C2227/0388; F17C2250/00; F17C2250/01; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0147; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/3133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US45153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |