US3337933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen grid tube with coaxial tubular mesh grids
Assignee: Siemens and Halske AG
•
Filing: 1964-09-16
•
Granted: 1967-08-29
•
Expires: 1984-09-16
Abstract
No abstract record available.
Inventors
- 👤 Seiffarth Werner
- 👤 Weissfloch Andreas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/38; H01J19/42; H01J19/46; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0006; H01J2893/0012; H01J2893/0015; H01J2893/0016; H01J2893/0017; H01J2893/0019; H01J2893/0022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A METHOD FOR THE PRODUCTION OF A SCREEN GRID TUBE, SUCH AS A POWER TETRODE HAVING CYLINDRICAL COAXIAL GRID ELECTRODES WITH GRID SURFACES IN THE FORM OF TUBULAR MESH GRIDS, THE MESH OPENINGS OF WHICH ARE SO FORMED AND ARRANGED THAT THE GRID ELEMENTS OF THE GRID ELECTRODES ARE OPERATIVELY ALIGNED WITH ONE ANOTHER, COMPRISING THE STEPS OF FORMING FROM SEAMLESS TUBULAR STOCK RESPECTIVE SEAMLESS THIN-WALL CYLINDERS OF A HIGH-MELTING METAL PROVIDED WITH REINFORCED EDGE PORTIONS, FORMING MESH OPENINGS IN EACH OF SAID FORMED CYLINDERS, WHILE IN UNASSEMBLED RELATION, IN LIKE NUMBER AND ARRANGEMENTS, WHICH ARE OF QUADRILATERAL SHAPE, WITH THE CORRESPONDING MESH DIMENSIONS IN AXIAL DIRECTION BETWEN THE OPENINGS OF RESPECTIVE GRID ELECTRODES BEING ALIKE, AND THE CORRESPONDING CIRCUMFERENTIAL DIMENSIONS THEREOF BEING GREATER IN CORRESPONDENCE TO THE RADIAL RELATIONSHIP INVOLVED, FORMING A RESPECTIVE MARKER ELEMENT ON A MESH-FREE PORTION OF EACH GRID ELECTRODE WITH EACH MARKER ELEMENT BEING DISPOSED IN LIKE RELATIONSHIP TO THE MESH OPENINGS IN THE ASSOCIATED GRID ELECTRODE, AND ASSEMBLING SAID ELECTRODES IN OPERATIVE RELATION, UTILIZING SAID MARKER ELEMENTS TO EFFECT FINAL OPERATIVE ALIGNMENT OF CORRESPONDING MESH OPENINGS OF THE RESPECTIVE GRID ELECTRODES.
Claim 2
Independent Claim
187 words
A METHOD FOR THE PRODUCTION OF A SCREEN GRID TUBE, SUCH AS A POWER TETRODE HAVING CYLINDRICAL COAXIAL GRID ELECTRODES WITH GRID SURFACES IN THE FORM OF TUBULAR MESH GRIDS, THE MESH OPENINGS OF WHICH ARE SO FORMED AND ARRANGED THAT THE GRID ELEMENTS OF THE GRID ELECTRODES ARE OPERATIVELY ALIGNED WITH ONE ANOTHER, COMPRISING THE STEPS OF FORMING FROM SEAMLESS TUBULAR STOCK RESPECTIVE SEAMLESS THIN-WALL CYLINDERS OF A HIGH-MELTING METAL PROVIDED WITH REINFORCED EDGE PORTIONS, FORMING MESH OPENINGS IN EACH OF SAID FORMED CYLINDERS, WHILE IN UNASSEMBLED RELATION, IN LIKE NUMBER AND ARRANGEMENTS, WHICH ARE OF QUADRILATERAL SHAPE, WITH THE CORRESPONDING MESH DIMENSIONS IN AXIAL DIRECTION BETWEN THE OPENINGS OF RESPECTIVE GRID ELECTRODES BEING ALIKE, AND THE CORRESPONDING CIRCUMFERENTIAL DIMENSIONS THEREOF BEING GREATER IN CORRESPONDENCE TO THE RADIAL RELATIONSHIP INVOLVED, FORMING A RESPECTIVE MARKER ELEMENT ON A MESH-FREE PORTION OF EACH GRID ELECTRODE WITH EACH MARKER ELEMENT BEING DISPOSED IN LIKE RELATIONSHIP TO THE MESH OPENINGS IN THE ASSOCIATED GRID ELECTRODE, AND ASSEMBLING SAID ELECTRODES IN OPERATIVE RELATION, UTILIZING SAID MARKER ELEMENTS TO EFFECT FINAL OPERATIVE ALIGNMENT OF CORRESPONDING MESH OPENINGS OF THE RESPECTIVE GRID ELECTRODES.
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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) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |