Method of making glass-metal seals
Abstract
Abstract A METHOD OF MAKING GLASS-METAL SEALS WHEREIN A METAL ROD IS INSERTED INTO AN ELONGATED HOLE IN A GLASS MATRIX. THE ROD AND MATRIX COMPOSITE IS THEN INSERTED INTO AN EXTRUSION BILLET. THE COMPOSITE CONTAINING BILLET IS THEN HEATED TO A TEMPERATURE WITHIN THE SOFTENIG RANGE OF THE GLASS MATRIX. THE BILLET IS THEN EXTRUDED TO FORM A COEXTRUSION BONDED GLASS-METAL ROD. THEREAFTER, AND END, ONLY, OF THE METALLIC ROD IS EXPOSED BY REMOVING PART OF THE GLASS MATRIX. DIFFERENT ARRANGEMENTS OF GLASS-METAL SEALS CAN BE FORMED BY INITIALLY ENCASING THE GLASS MATRIX IN A FIRST METALLIC SLEEVE AND BY INSERTING ANOTHER METALLIC SLEEVE BETWEEN THE GLASS MATRIX AND THE FIRST METALLIC SLEEVE.
Inventors
- 👤 James G Hunt
Bibliographic Details
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |