US3301702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating for the protection of ferrous base alloys at elevated temperatures
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1963-05-09
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Granted: 1967-01-31
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Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 Stuart L Ames
- 👤 Jr Frank A Malagari
- 👤 Jr Jesse R Conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/68; C21D1/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF PROTECTING THE SURFACE OF FERROUS BASE ALLOYS FROM SEALING OR DECARBURIZATION IN OXIDIZING ATMOSPHERES AT TEMPERATURES FROM 1800*F. TO 2400*F., COMPRISING THE STEPS OF CLEANING THE SURFACE OF THE ALLOY WITH AN INORGANIC DETERGENT CLEANER, AND THEREAFTER PLACING ON THE SURFACE OF THE ALLOY A COATING CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE AND FROM ABOUT 14% TO ABOUT 53* ALUMINUM OXIDE.
Claim 2
Independent Claim
69 words
A METHOD OF PROTECTING THE SURFACE OF FERROUS BASE ALLOYS FROM SEALING OR DECARBURIZATION IN OXIDIZING ATMOSPHERES AT TEMPERATURES FROM 1800*F. TO 2400*F., COMPRISING THE STEPS OF CLEANING THE SURFACE OF THE ALLOY WITH AN INORGANIC DETERGENT CLEANER, AND THEREAFTER PLACING ON THE SURFACE OF THE ALLOY A COATING CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE AND FROM ABOUT 14% TO ABOUT 53* ALUMINUM OXIDE.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |