Patent US3532606A successfully refreshed from Google Patents.
US3532606A
Expired / Lapsed
US
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Water purification apparatus with three chambers and controls
Assignee: Individual
•
Filing: 1968-02-29
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Granted: 1970-10-06
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Expires: 1988-02-29
Abstract
No abstract record available.
Inventors
- 👤 Frank Sibert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:13
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; Y; Y02; Y02A; Y02A20/00; Y02A20/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US389160A
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US482581A
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US616277A
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US771832A
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US1525762A
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US1881718A
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US2140623A
Cited
US3055810A
Cited
US3074686A
Cited
US3438869A
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 |