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Patent US2115188A successfully refreshed from Google Patents.
US2115188A
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Apparatus for aerating liquids
Assignee: INTERNAT FILTER CO
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Filing: 1934-04-02
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Granted: 1938-04-26
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Expires: 1954-04-02
Abstract
No abstract record available.
Inventors
- 👤 John F Atkinson
- 👤 Cleo E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/16; C02F3/165; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; Y; Y02; Y02W; Y02W10/00; Y02W10/10
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) | 1941-04-25 | 1941-10-25 | 1942-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-25 | 1945-10-25 | 1946-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-25 | 1949-10-25 | 1950-04-26 | $7700.00 | Window Closed / Lapsed |