US3706579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cermet protective coating
Assignee: Boeing North American Inc
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Filing: 1970-09-04
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Granted: 1972-12-19
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Expires: 1990-09-04
Abstract
Abstract A NOVEL PROTECTIVE COATING COMPOSITION FOR APPLICATION TO METALS BY FIRING IN AN OXIDIZING ENVIRONEMENT AT A TEMPERATURE IN THE GENERAL RANGE OF 1250*F. TO 1600*F., AND ESSENTIALLY CONSISTING FO ALUMINUM, A SPECIAL MILL ADDITION HAVING BOTH REFRACTORY COMPOUND AND REDUCIBLE COMPOUND CONSTITUENTS, AND A SPECIAL HOMOGENEOUS GLASS FRIT, OBTAINS IMPROVED RESISTANCE OF THE METALS TO WEATHERING AND TO CORROSION BY ALKALINE OR ACID SOLUTION ATTACK UNDER ATMOSPHERIC CONDITIONS.
Inventors
- 👤 Harold J Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:53
CPC Classifications
C; C23; C23D; C23D5/00; C23D5/02; C03; C03C; C03C10/00; C03C10/0054; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/066; C03C3/076; C03C3/089; C03C4/00; C03C8/00; C03C8/02; C03C8/04
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |