Patent US5549697A successfully refreshed from Google Patents.
US2774686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot dip aluminum coating process
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1952-01-08
•
Granted: 1956-12-18
•
Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Allen W Hodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:49
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/12; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN THE ART OF HOT DIP COATING OF BASIS METALS WITH A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ITS ALLOYS, THE IMPROVEMENT WHICH COMPRISES INTRODUCING ALKALI METAL INTO A BATH OF A MOLTEN METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ITS ALLOYS AND WHEREIN NO PROTECTIVE ATMOSPHERE IS EMPLOYED OVER SAID BATH, AND PASSING SAID BASIS METAL THROUGH THE MELT TO PROVIDE SAID BASIS METAL WITH A COATING OF SAID MOLTEN METAL, THE ALKALI METAL BEING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM AND MIXTURES THEREOF AND BEING INTRODUCED IN A MINOR AMOUNT SUFFICIENT TO ENABLE SAID BASIS METAL TO BE COATED AT A FASTER RATE AND THE RESULTING COATING TO BE COMPLETE, EVEN AND SMOOTH AS COMPARED TO A SIMILAR BATH WHICH HAS NOT BEEN TREATED WITH SAID ALKALI METAL, AND TO INCREASE DRAINAGE AND TO EXTEND BATH LIFE.
Claim 2
Dependent Claim
150 words
IN THE ART OF HOT DIP COATING OF BASIS METALS WITH A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ITS ALLOYS, THE IMPROVEMENT WHICH COMPRISES INTRODUCING ALKALI METAL INTO A BATH OF A MOLTEN METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ITS ALLOYS AND WHEREIN NO PROTECTIVE ATMOSPHERE IS EMPLOYED OVER SAID BATH, AND PASSING SAID BASIS METAL THROUGH THE MELT TO PROVIDE SAID BASIS METAL WITH A COATING OF SAID MOLTEN METAL, THE ALKALI METAL BEING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM AND MIXTURES THEREOF AND BEING INTRODUCED IN A MINOR AMOUNT SUFFICIENT TO ENABLE SAID BASIS METAL TO BE COATED AT A FASTER RATE AND THE RESULTING COATING TO BE COMPLETE, EVEN AND SMOOTH AS COMPARED TO A SIMILAR BATH WHICH HAS NOT BEEN TREATED WITH SAID ALKALI METAL, AND TO INCREASE DRAINAGE AND TO EXTEND BATH LIFE.
References Cited (Backward Citations)
US491220A
Cited
US1410461A
Cited
US1595219A
Cited
US2276232A
Cited
US2525130A
Cited
US2497119A
Cited
US2437919A
Cited
US2544671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |