Patent US3532272A successfully refreshed from Google Patents.
US3532272A
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Means for diffusing gases into liquids
Assignee: Activated Sludge Ltd
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Filing: 1968-03-06
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Granted: 1970-10-06
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Expires: 1988-03-06
Abstract
No abstract record available.
Inventors
- 👤 Eric Sidney Branton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:42
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2311; C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; B01F23/23114; B01F23/231142; B01F23/231143; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1152636A
Cited
US2430749A
Cited
US2639131A
Cited
US2946518A
Cited
US3009655A
Cited
US3425630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |