US3811959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant coating system
Assignee: Chromalloy American Corp
•
Filing: 1972-08-24
•
Granted: 1974-05-21
•
Expires: 1992-08-24
Abstract
Abstract AND CURED IN SITU TO FURTHER ENHANCE THE RESISTANCE TO CORROSION. FERROUS METAL ARTICLES ARE PROVIDED HAVING IMPROVED RESISTANCE TO CORROSION IN HIGHLY SALINE AND/OR MARINE ATMOSPHRES, THE ARTICLES BEING CHARACTERIZED BY A PROTECTIVE DUPLEX COATING COMPRISED OF A SACRIFICAL THERMALLY ALUMINIZED FERROUS METAL SURFACE IN A COMBINATION WITH A SPECIAL BARRIER TYPE NON-METALLIC OVERCOAT. ONE METHOD OF PROVIDING THE FOREGOING SYSTEM IS TO APPLY AN ADHERENT LAYER FROM A LIQUID OF A SOLUBLE SILICATE SALT OR COMPOUND ONTO A THERMALLY ALUMINIZED LAYER, THE SILICATE LYER BEING PREFERABLY THEREAFTER CURED. IN A PREFERRED EMBODIMENT, A CONVERSION COATING IS APPLIED TO THE SILICATE LAYER
Inventors
- 👤 M Weinstein
- 👤 K Speirs
- 👤 R Baer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:54
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/60; C23C22/00; C23C22/73; C23C22/74
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |