US3677953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanganate silicate cleaner
Assignee: Henkel Corp
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Filing: 1971-03-11
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Granted: 1972-07-18
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Expires: 1991-03-11
Abstract
Abstract COMPOSITIONS CONSISTING OF AN ALKALI METAL PERMANGANATE AND ALKALI METAL SILICATE WHICH, WHEN DISSOLVED IN AQUEOUS SOLUTION, PROVIDE IMPROVED SOLUTIONS FOR TREATING FERROUS METAL SURFACES TO REMOVE SCALE DEPOSITS AND OTHER CONTAMINANTS IN THE FORM OF SMUT FORMED THEREON; PARTICULARLY FOR THE REMOVAL OF OXIDE INCRUSTATIONS AND SMUT FROM FERROUS METAL SURFACES WHICH HAVE BEEN PREVIOUSLY HEAT TREATED.
Inventors
- 👤 Robert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:50
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3942; C11D7/00; C11D7/02; C11D7/04; C11D7/10; C11D7/14; C23; C23G; C23G1/00; C23G1/14; C23G1/19
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |