Patent US3483120A successfully refreshed from Google Patents.
US3483120A
Expired / Lapsed
US
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Clarification and disinfection of water
Assignee: Dow Chemical Co
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Filing: 1967-11-21
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Granted: 1969-12-09
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Expires: 1987-11-21
Abstract
No abstract record available.
Inventors
- 👤 Asa E Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F1/5236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1094731A
Cited
US1088063A
Cited
FR1045628A
Cited
GB826770A
Cited
US3142638A
Cited
US3171800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |