US3044893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming coatings of vitreous material on a heated metal billet
Assignee: Cefilac SA
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Filing: 1960-03-21
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Granted: 1962-07-17
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Heintz Rene
- 👤 Jour Jean-Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:42
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF SIMULTANEOUSLY COATING THE WALL OF A BORE OF A METAL BILLET AND THE EXTERNAL SURFACE OF THE BILLET WITH LAYERS OF VITREOUS MATERIAL, WHICH COMPRISES PLACING POWDERED VITREOUS MATERIAL IN THE BORE OF A METAL BILLET HEATED TO A TEMPERATURE SUFFICIENT S TO MELT THE VITREOUS MATERIAL, INTRODUCING THE BILLET INTO A LATTICED DRUM, ROTATING THE DRUM TO ROTATE THE BILLET AND DISTRIBUTING POWDERED VITREOUS MATERIAL THROUGH THE LATTICED DRUM ONTO THE EXTERNAL SURFACE OF THE BILLET WHILE IT IS ROTATING.
Claim 2
Independent Claim
84 words
THE METHOD OF SIMULTANEOUSLY COATING THE WALL OF A BORE OF A METAL BILLET AND THE EXTERNAL SURFACE OF THE BILLET WITH LAYERS OF VITREOUS MATERIAL, WHICH COMPRISES PLACING POWDERED VITREOUS MATERIAL IN THE BORE OF A METAL BILLET HEATED TO A TEMPERATURE SUFFICIENT S TO MELT THE VITREOUS MATERIAL, INTRODUCING THE BILLET INTO A LATTICED DRUM, ROTATING THE DRUM TO ROTATE THE BILLET AND DISTRIBUTING POWDERED VITREOUS MATERIAL THROUGH THE LATTICED DRUM ONTO THE EXTERNAL SURFACE OF THE BILLET WHILE IT IS ROTATING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |