US3783035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating ferrous metals
Assignee: Olin Corp
•
Filing: 1972-05-15
•
Granted: 1974-01-01
•
Expires: 1992-05-15
Abstract
Abstract PROCTETIVE COATINGS ARE APPLIED TO FERROUS METALS BY: (A) ETCHING THE METAL FIRST IN NITRIC, THEN IN HYDROFLUORIC ACID; (B) FORMING A MAGNETITE COATING ON THE ETCHED METAL BY HEATING IN CONTACT WITH AQUEOUS HYDRAZINE, AND (C) APPLYING AN ORGANIC COATING TO THE MAGNETITECOATED FERROUS METAL.
Inventors
- 👤 D Eisenlohr
- 👤 H Schiessl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:15
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/80; C23C22/00; C23C22/05; C23C22/68; C23C8/06; C23C8/08; C23C8/10; C23C8/16; C23C8/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31551; Y10T428/31605; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31707
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |