US2502187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser apparatus for treating liquids with a gaseous medium
Assignee: Cardox Corp
•
Filing: 1947-01-09
•
Granted: 1950-03-28
•
Expires: 1967-01-09
Abstract
No abstract record available.
Inventors
- 👤 Albert W Wahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:39
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23124; B01F23/231245; B01F23/23125; B01F23/2311; B01F23/23115; B01F23/231153; B01F23/23116; B01F23/23126; B01F23/231265; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305943A
Cited
US1314316A
Cited
US894168A
Cited
US1124855A
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US2063480A
Cited
GB431674A
Cited
US2241337A
Cited
US2382393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |