Patent US3598620A successfully refreshed from Google Patents.
US3598620A
Expired / Lapsed
US
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Alkali-free molybdenum sealing hard glass
Assignee: Transitron Electronic Corp
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Filing: 1968-04-24
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Granted: 1971-08-10
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Expires: 1988-04-24
Abstract
Abstract AN ALKALI-FREE, TRANSPARENT, HOMOGENEOUS GLASS COMPOSITION IS PROVIDED COMPRISING THE FOLLOWING CONSTITUENT OXIDES IN PERCENT BY WEIGHT, SILICON DIOXIDE 20-30, ALUMINUM OXIDE 18, BORON OXIDE 39-47, CALCIUM OXIDE 11-15 AND MAGNESIUM OXIDE 1. A METHOD OF FORMING THIS ALKALIFREE, TRANSPARENT, GLASS COMPOSITION OF THIS INVENTION IS ALSO PROVIDED. THE GLASS COMPOSITION IS PARTICULARLY DESIGNED FOR SEALING AND ENCAPSULATION OFELECTRONIC DEVICES HAVING MOLYDENUM PINS OR LEADS.
Inventors
- 👤 Saleem Akhtar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:40
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |