Patent US2022443A successfully refreshed from Google Patents.
US2022443A
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Liquid control apparatus
Assignee: Individual
•
Filing: 1934-12-17
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Granted: 1935-11-26
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Expires: 1954-12-17
Abstract
No abstract record available.
Inventors
- 👤 Walter C Stollberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:33
CPC Classifications
F; F23; F23K; F23K5/00; F23K5/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7297; Y10T137/73; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/8593; Y10T137/86187; Y10T137/86228; Y10T137/86292; Y10T137/8634; Y10T137/86348
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) | 1938-11-25 | 1939-05-27 | 1939-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-25 | 1943-05-27 | 1943-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-25 | 1947-05-27 | 1947-11-26 | $7700.00 | Window Closed / Lapsed |