US3676224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphating solution with scale suppressing characteristics
Assignee: MAN-GILL CHEMICAL COMPANY AN OH CORP
•
Filing: 1970-10-16
•
Granted: 1972-07-11
•
Expires: 1990-10-16
Abstract
Abstract MODIFIED ZINC PHOSPHATE SOLUTIONS FOR THE TREATMENT OF METAL SURFACES, WHEREIN THE MODIFYING METAL IS CALCIUM, MAGNESIUM, LITHIUM, BERYLLIUM, STRONTIUM, CADMIUM OR BARIUM (PREFERABLY CALCIUM AND/OR MAGNESIUM), TEND TO FORM SCALE ON THE SURFACE OF PHOSPHATING APPARATUS. THIS SCALE FORMATION IS SUPPRESSED BY THE ADDITION TO THE PHOSPHATING SOLUTION OF A FLUORINE-CONTAINING COMPLEX ION SUCH AS FLUOSILICATE OR FLUOBORATE.
Inventors
- 👤 Charles Thomas Snee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:46
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/36; C23C22/368; C23C22/367
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |