US2753073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for composite cathode ray tubes
Assignee: RCA Corp
•
Filing: 1949-12-15
•
Granted: 1956-07-03
•
Expires: 1969-12-15
Abstract
No abstract record available.
Inventors
- 👤 Richard D Faulkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/87
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
A COMPOSITE METAL AND GLASS ENVELOPE COMPRISING, A HOLLOW METALLIC SHELL MEMBER HAVING A RADIAL FLANGE EXTENDING OUTWARDLY FROM ONE END THEREOF, THE INNER SURFACE OF SAID METALLIC MEMBER FORMED WITH A SHOULDER WHERE SAID FLANGE JOINS WITH SAID MEMBER, AND A GLASS FACE PLATE SEALED VACUUM TIGHT AROUND ITS PERIPHERY TO SAID FLANGE, SHOULDER AND AN APPRECIABLE PORTION OF THE INNER SURFACE OF SAID METALLIC MEMBER ADJACENT TO SAID SHOULDER, SAID SHOULDER INTERCEPTING THE SECTIONAL PORTION OF THE FACE PLATE THICKNESS AT THE PERIPHERY OF THE FACE PLATE THEREOF, SAID GLASS FACE PLATE HAVING A COEFFICIENT OF EXPANSION LESS THAN THAT OF SAID METALLIC SHELL.
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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) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |