US2822820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for regulating the flow of a gaseous medium
Assignee: Svenska Flaktfabriken AB
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Filing: 1955-10-17
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Granted: 1958-02-11
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Samuelsson Evert Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:24
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0173; C; C10; C10J; C10J3/00; C10J3/58; C10J3/60; C10J3/64; F; F16; F16K; F16K13/00; F16K13/02; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/80; F24F11/81; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7786; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/87265; Y10T137/87338; Y10T137/8741; Y10T137/87442; Y10T137/87917; Y10T137/87981
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |