US3715867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying gases
Assignee: Individual
•
Filing: 1970-11-30
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Granted: 1973-02-13
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Expires: 1990-11-30
Abstract
Abstract A GAS SEPARATING CHAMBER IS DEFINED IN A BOX OR VESSEL WHICH HAS INLET, A GAS OUTLET AND AN EXHAUST TUBE. AN ADIABATIC EXPANSION CHAMBER FOR SEPARATION AND REMOVAL OF TOXIC COMPONENTS IN GASES IS POSITIONED WITHIN THE GAS SEPARATING CHAMBER AND A COOLING MEANS FOR REDUCING THE TEMPERATURE OF GASES IS DIPOSED INSIDE OR OUTSIDE OF THE VESSEL.
Inventors
- 👤 K Aoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D51/00; B01D51/10; B01D57/00
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |