US3251641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube and method of making the same
Assignee: RCA Corp
•
Filing: 1962-03-27
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Granted: 1966-05-17
•
Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Gaylord John Wallen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:35
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J19/46; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
METHOD OF MAKING AN ELECTRON TUBE COMPRISING (A) MUTUALLY FIXING IN RELATIVELY CLOSE SPACED RELATION TO A TUBULAR CATHODE HAVING OPENINGS IN THE SIDE WALL THEREOF BRIDGED BY A METAL MATRIX, WITHIN A TUBULAR GRID, AND THEREAFTER (B) DISPENSING EMITTING MATERIAL TO THE INNER SURFACE TO THE OUTER SURFACES OF SAID MATRIX IN SAID OPENINGS. THE OUTER SURFACES OF SAID MATRIX IN SAID OPENINGS.
Claim 2
Dependent Claim
64 words
METHOD OF MAKING AN ELECTRON TUBE COMPRISING (A) MUTUALLY FIXING IN RELATIVELY CLOSE SPACED RELATION TO A TUBULAR CATHODE HAVING OPENINGS IN THE SIDE WALL THEREOF BRIDGED BY A METAL MATRIX, WITHIN A TUBULAR GRID, AND THEREAFTER (B) DISPENSING EMITTING MATERIAL TO THE INNER SURFACE TO THE OUTER SURFACES OF SAID MATRIX IN SAID OPENINGS. THE OUTER SURFACES OF SAID MATRIX IN SAID OPENINGS.
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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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |