US3719990A
Expired / Lapsed
US
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Vacuum tight lead throughs for dewar mounted infrared detectors
Assignee: Optoelectronics Inc
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Filing: 1970-11-23
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Granted: 1973-03-13
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Expires: 1990-11-23
Abstract
Abstract AN IMPROVEMENT CONSTRUCTION AND PROCESS FOR CONSTRUCTING VACUUM TIGHT LEAD THROUGHS IS DISCLOSED FOR USE WITH DEWAR MOUNTED MULTI-ELEMENT INFRARED DETECTORS. D R A W I N G
Inventors
- 👤 J Long
- 👤 B Justus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:38
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/061; H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/305; H01J; H01J5/00; H01J5/32; H01J5/44; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49146; Y10T29/49826; Y10T29/49895; Y10T29/49902
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |