US2709154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resisting coatings
Assignee: American Electro Metal Corp
•
Filing: 1949-12-08
•
Granted: 1955-05-24
•
Expires: 1969-12-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:51
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE METHOD OF PROVIDING A SHAPE-RETAINING BODY OF A BASE METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN, MOLYBDENUM BASE ALLOYS AND TUNGSTEN BASE ALLOYS WITH A PROTECTIVE COATING WHICH WILL REMAIN SUBSTANTIALLY FREE OF CORROSION WHEN EXPOSED TO HIGH TEMPERATURE COMBUSTION GASES WITHIN THE INTERIOR OF A COMBUSTION ENGINE WHICH METHOD COMPRISES PLACING THE BODY IN A MOLTEN ELECTROLYTE BATH CONTAINING ALUMINUM COMPOUNDS AND MAINTAINED AT A HIGH TEMPERATURE BETWEEN ABOUT 900* C. AND 1100* C., PASSING A HIGH CURRENT DENSITY ELECTRIC CURRENT FROM AN ANODE IN SAID BATH TO SAID BODY AS A CATHODE, HELD HEATED IN SAID BATH AT SAID HIGH TEMPERATURE, AND DEPOSITING ALUMINUM ON THE EXTERIOR OF SAID BODY AND THEREBY CAUSING THE DEPOSITED ALUMINUM TO COMBINE WITH THE BASE METAL OF THE BODY INTO A PROTECTIVE COATING CONTAINING AT LEAST ONE CONTINUOUS, DENSE, OXYGEN-IMPERVIOUS INTERMETALLIC COMPOUND LAYER BETWEEN THE BASE METAL AND ALUMINUM, AND THE REMOVING SUBSTANTIALLY ALL FREE ALUMINUM REMAINING ON THE EXTERIOR OF SAID BODY.
Claim 2
Independent Claim
164 words
THE METHOD OF PROVIDING A SHAPE-RETAINING BODY OF A BASE METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN, MOLYBDENUM BASE ALLOYS AND TUNGSTEN BASE ALLOYS WITH A PROTECTIVE COATING WHICH WILL REMAIN SUBSTANTIALLY FREE OF CORROSION WHEN EXPOSED TO HIGH TEMPERATURE COMBUSTION GASES WITHIN THE INTERIOR OF A COMBUSTION ENGINE WHICH METHOD COMPRISES PLACING THE BODY IN A MOLTEN ELECTROLYTE BATH CONTAINING ALUMINUM COMPOUNDS AND MAINTAINED AT A HIGH TEMPERATURE BETWEEN ABOUT 900* C. AND 1100* C., PASSING A HIGH CURRENT DENSITY ELECTRIC CURRENT FROM AN ANODE IN SAID BATH TO SAID BODY AS A CATHODE, HELD HEATED IN SAID BATH AT SAID HIGH TEMPERATURE, AND DEPOSITING ALUMINUM ON THE EXTERIOR OF SAID BODY AND THEREBY CAUSING THE DEPOSITED ALUMINUM TO COMBINE WITH THE BASE METAL OF THE BODY INTO A PROTECTIVE COATING CONTAINING AT LEAST ONE CONTINUOUS, DENSE, OXYGEN-IMPERVIOUS INTERMETALLIC COMPOUND LAYER BETWEEN THE BASE METAL AND ALUMINUM, AND THE REMOVING SUBSTANTIALLY ALL FREE ALUMINUM REMAINING ON THE EXTERIOR OF SAID BODY.
References Cited (Backward Citations)
US1562164A
Cited
US1488553A
Cited
US1933319A
Cited
US2082622A
Cited
US2109887A
Cited
FR876759A
Cited
US2497119A
Cited
US2555372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |