Patent US3147221A successfully refreshed from Google Patents.
US3147221A
Expired / Lapsed
US
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Influent distribution means for tanks
Assignee: Chain Belt Co
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Filing: 1961-01-16
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Granted: 1964-09-01
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Expires: 1981-01-16
Abstract
No abstract record available.
Inventors
- 👤 William F Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:56
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/24; B; B01; B01D; B01D21/00; B01D21/0039; B01D21/0042; B01D21/0087; B01D21/02; B01D21/04; B01D21/24; B01D21/2405; B01D21/2433; B01D21/2438; B01D21/245; B01D21/2461; C02F1/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1374625A
Cited
US1931988A
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US2059844A
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US2525936A
Cited
US2702124A
Cited
US2708520A
Cited
US2973866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |