US2617068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-tight glass-metal joint for vessels containing cesium vapor
Assignee: Fkg Fritz Kesselring Geratebau AG
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Filing: 1949-12-13
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Granted: 1952-11-04
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Expires: 1969-12-13
Abstract
No abstract record available.
Inventors
- 👤 Spinnler Wilhelm
- 👤 Bacher Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:58
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A THERMIONIC DISCHARGE DEVICE COMPRISING, IN COMBINATION, A SEALED ENVELOPE CONTAINING CESIUM VAPOR AND HAVING AN ENVELOPE PORTION OF CESIUM-RESISTANT BOROSILICATE GLASS, A VACUUMPROOF GLASS-TO-METAL FUSION SEAL FORMING PART OF SAID PORTION AND BEING EXPOSED TO SAID CESIUM VAPOR, SAID SEAL HAVING A LEAD-IN WIRE OF MOLYBDENUM AND A GLASS-MOLYBDENUM OXIDE FUSION ZONE JOINING SAID BOROSILICATE GLASS WITH SAID WIRE.
Claim 2
Dependent Claim
60 words
A THERMIONIC DISCHARGE DEVICE COMPRISING, IN COMBINATION, A SEALED ENVELOPE CONTAINING CESIUM VAPOR AND HAVING AN ENVELOPE PORTION OF CESIUM-RESISTANT BOROSILICATE GLASS, A VACUUMPROOF GLASS-TO-METAL FUSION SEAL FORMING PART OF SAID PORTION AND BEING EXPOSED TO SAID CESIUM VAPOR, SAID SEAL HAVING A LEAD-IN WIRE OF MOLYBDENUM AND A GLASS-MOLYBDENUM OXIDE FUSION ZONE JOINING SAID BOROSILICATE GLASS WITH SAID WIRE.
References Cited (Backward Citations)
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Cited
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Cited
GB354620A
Cited
US1922535A
Cited
US2060043A
Cited
US2190302A
Cited
US2515706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |