US3597260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passivation of metals
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-11-01
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Granted: 1971-08-03
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Expires: 1986-11-01
Abstract
Abstract A PROCESS FOR PASSIVATING CHEMICALLY ACTIVE FERROUS METALS, ESPECIALLY POWDERED METALS AND POROUS, COMPACTED FORMS OF METALS AS RESULTANT FROM DIRECT IRON ORE REDUCTION PROCESSES. THE EXTERIOR SURFACE OF THE METAL, OR METAL SUBSTRATE, IS CONTACTED WITH A LIQUID CONTAINING SPECIFIC TYPES OF DIMETALLO SUBSTITUTED ORGANO SILANO DIOLS TO FORM FILMS. THE FILMS ARE THEN CURED BY REACTION WITH MOISTURE AND CARBON DIOXIDE. THE RESINOUS MATERIAL WHICH IS FORMED, OF SPECIFIED CHARACTER, IS IMPERVIOUS TO MOISTURE, CORROSIVE GASES, FUMES AND IMPURITIES.
Inventors
- 👤 Marnell A Segura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:39
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/12; C23F11/122; B; B22; B22F; B22F9/00; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C21; C21B; C21B13/00; C21B13/0086; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |