US4177437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power pre-TR switch
Assignee: United States Department of the Air Force
•
Filing: 1978-01-20
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Granted: 1979-12-04
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Expires: 1998-01-20
Abstract
Abstract A high power pre-TR switch utilizes hot pressed boron nitride to form a vial. The vial contains a halogen gas such as chlorine.
Inventors
- 👤 James F. McLaughlin
- 👤 Harry Goldie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:13
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01P1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A high power pre-TR switch comprising a machined, hot pressed boron nitride vial, a reservoir vessel sealably connected thereto, said vial and said reservoir vessel defining a hermetically sealed enclosure, a halogen in said vial, and heat sink means affixed to said vial.
Claim 2
Dependent Claim
43 words
A high power pre-TR switch comprising a machined, hot pressed boron nitride vial, a reservoir vessel sealably connected thereto, said vial and said reservoir vessel defining a hermetically sealed enclosure, a halogen in said vial, and heat sink means affixed to said vial.
References Cited (Backward Citations)
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Cited
US3497833A
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US3648100A
Cited
US3705319A
Cited
US4120808A
Cited
US3753158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |