Patent US3481857A successfully refreshed from Google Patents.
US3481857A
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US
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Apparatus for chlorinating water
Assignee: Individual
•
Filing: 1966-10-03
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Granted: 1969-12-02
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 David C Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:14
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4672; C02F1/4674; E; E04; E04H; E04H4/00; E04H4/12; E04H4/129; C02F1/46104; C02F1/46109; C02F2103/00; C02F2103/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US820113A
Cited
US1020001A
Cited
US1440091A
Cited
US1930830A
Cited
US3282823A
Cited
US3378479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |