US3243072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Faceplate seal
Assignee: —
•
Filing: —
•
Granted: 1966-03-29
•
Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:59
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; H01J29/00; H01J29/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FACEPLATE SEAL FOR AN ELECTRON TUBE COMPRISING: AN ENVELOPE; AN OUTER METALLIC RING SECURED TO AND PROJECTING FROM ONE END OF SAID ENVELOPE; A FACEPLATE HAVING A TEMPERATURE EXPANSION CHARACTERISTIC SUBSTANTIALLY DIFFERENT FROM THAT OF SAID ENVELOPE; AN INTERMEDIATE METALLIC RING OF DUCTILE METAL POSITIONED WITHIN AND ABUTTING SAID OUTER RING AND HAVING AN INNER SURFACE SECURED TO SAID FACEPLATE; A COATING OF CEMENT FORMING A VACUUM-TIGHT SEAL SECURING SAID FACEPLATE AND INTERMEDIATE RING, SAID DUCTILE METAL BEING RESISTANT TO DISSOLUTION IN SAID CEMENT; AN INNER METALLIC RING DISPOSED WITHIN SAID INTERMEDIATE RING AND EXTENDING OUTWARDLY OF SAID FACE PLATE; AND A WELD SECURING SAID THREE RINGS TOGETHER TO FORM A VACUUM TIGHT SEAL.
Claim 2
Dependent Claim
115 words
A FACEPLATE SEAL FOR AN ELECTRON TUBE COMPRISING: AN ENVELOPE; AN OUTER METALLIC RING SECURED TO AND PROJECTING FROM ONE END OF SAID ENVELOPE; A FACEPLATE HAVING A TEMPERATURE EXPANSION CHARACTERISTIC SUBSTANTIALLY DIFFERENT FROM THAT OF SAID ENVELOPE; AN INTERMEDIATE METALLIC RING OF DUCTILE METAL POSITIONED WITHIN AND ABUTTING SAID OUTER RING AND HAVING AN INNER SURFACE SECURED TO SAID FACEPLATE; A COATING OF CEMENT FORMING A VACUUM-TIGHT SEAL SECURING SAID FACEPLATE AND INTERMEDIATE RING, SAID DUCTILE METAL BEING RESISTANT TO DISSOLUTION IN SAID CEMENT; AN INNER METALLIC RING DISPOSED WITHIN SAID INTERMEDIATE RING AND EXTENDING OUTWARDLY OF SAID FACE PLATE; AND A WELD SECURING SAID THREE RINGS TOGETHER TO FORM A VACUUM TIGHT SEAL.
References Cited (Backward Citations)
US2708250A
Cited
US2723044A
Cited
US2915153A
Cited
US2987686A
Cited
US3115957A
Cited
US3179213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |