US3553016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for treating stainless steel
Assignee: Lithcote Corp
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Filing: 1967-06-02
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Granted: 1971-01-05
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Expires: 1987-06-02
Abstract
Abstract A COMPOSITION FOR CLEANING AND TREATING STAINLESS STEEL IS DISCLOSED COMPRISING AN AQUEOUS SOLUTION OF NITRIC ACID AND A THICKENING AGENT WITH OR WITHOUT A WETTING AGENT. IN ONE EMBODIMENT COMPOSITIONS CONTAINING NITRIC ACID AND A THICKENING AGENT OF THE GROUP CONSISTING OF FINELY DIVIDED SILICA, SEED FLOUR AND THEIR MIXTURES AND BORIC ACID ARE DISCLOSED. THE METHOD OF CLEANING COMPRISES APPLYING A COATING OF THE COMPOSITION TO THE SURFACE OF THE METAL, ALLOWING THE COATING TO REMAIN FOR AT LEAST ABOUT ONE-HALF HOUR AND REMOVING THE COATING FROM THE SURFACE. THE TREATED SURFACE MAY BE SUBJECTED TO FURTHER PASSIVATION.
Inventors
- 👤 Henry W Foelsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:28
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/025
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |