US3515420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quartz to metal seal for electrical devices
Assignee: General Electric Co
•
Filing: 1968-09-26
•
Granted: 1970-06-02
•
Expires: 1988-09-26
Abstract
No abstract record available.
Inventors
- 👤 Gene I Thomasson
- 👤 Edward V Parillo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:33
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/38; C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/044; Y; Y10; Y10T; Y10T403/00; Y10T403/21; Y10T403/217
Claims Analysis
Total Claims: 0
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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) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |