US3493328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing hexavalent chromium from industrial metal treating wastes and rinse waters
Assignee: Individual
•
Filing: 1966-09-08
•
Granted: 1970-02-03
•
Expires: 1986-09-08
Abstract
No abstract record available.
Inventors
- 👤 Garmt J Nieuwenhuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:20
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/14; C02; C02F; C02F2101/00; C02F2101/10; C02F2101/20; C02F2101/22; C02F2103/00; C02F2103/16; C02F2209/00; C02F2209/06; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/911; Y10S210/912; Y10S210/913
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |