US3778368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposal of metal-containing waste water
Assignee: Sankyo Kasei Co Ltd
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Filing: 1972-08-14
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Granted: 1973-12-11
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Expires: 1992-08-14
Abstract
Abstract IN TREATING WASTE WATER CONTAINING AT LEAST ONE OF METAL IONS HAVING A NORMAL ELECTRODE POTENTIAL OF AT LEAST -0.440 V. (AT 25*C.) TO REMOVE THE METAL ION THEREFROM, A METHOD WHICH IS CHARACTERIZED IN THAT TO THE WASTE WATER IS ADDED AT LEAST ONE OF MERCAPTO-S-TRIAZINES AND WATER-SOLUBLE SALTS THEREOF.
Inventors
- 👤 I Yamada
- 👤 Y Nakamura
- 👤 A Umehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5272; C02F1/5236; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/911; Y10S210/912; Y10S210/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |