US3756774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous bleach bath
Assignee: BASF SE
•
Filing: 1971-09-20
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Granted: 1973-09-04
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Expires: 1991-09-20
Abstract
Abstract AQUEOUS ACIDIC BLEACH BATH BASED ON HYDROGEN PEROXIDE AND ORGANIC CYANIDES.
Inventors
- 👤 U Kirner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:09
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/3917; C11D3/3925; D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |