US2880120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a microwave attenuator for travelling wave tube
Assignee: Unisys Corp
•
Filing: 1954-05-04
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Granted: 1959-03-31
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Expires: 1974-05-04
Abstract
No abstract record available.
Inventors
- 👤 James S Pelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:03
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5001; C04B41/80; C04B41/81; C04B41/85; H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/30; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF MANUFACTURING A MICROWAVE ATTENUATOR AND SUPPORT FOR THE HELIX OF A TRAVELLING WAVE TUBE, COMPRISING THE STEPS OF: IMPREGNATING PART OF A POROUS CERAMIC ROD WITH A SOLUTION OF AN ORGANIC COMPOUND, HEATING SAID ROD AT A LOW TEMPERATURE FOR GRADUAL DECOMPOSITION OF SAID ORGANIC COMPOUND INTO A CARBON CONTAINING MATERIAL, AND FIRING SAID ROD AT AN ELEVATED TEMPERATURE WELL ABOVE SAID LOW TEMPERATURE FOR CONVERTING SAID MATERIAL TO GRAPHITE HAVING DESIRED MICROWAVE LOSS PROPERTIES.
Claim 2
Independent Claim
78 words
THE METHOD OF MANUFACTURING A MICROWAVE ATTENUATOR AND SUPPORT FOR THE HELIX OF A TRAVELLING WAVE TUBE, COMPRISING THE STEPS OF: IMPREGNATING PART OF A POROUS CERAMIC ROD WITH A SOLUTION OF AN ORGANIC COMPOUND, HEATING SAID ROD AT A LOW TEMPERATURE FOR GRADUAL DECOMPOSITION OF SAID ORGANIC COMPOUND INTO A CARBON CONTAINING MATERIAL, AND FIRING SAID ROD AT AN ELEVATED TEMPERATURE WELL ABOVE SAID LOW TEMPERATURE FOR CONVERTING SAID MATERIAL TO GRAPHITE HAVING DESIRED MICROWAVE LOSS PROPERTIES.
References Cited (Backward Citations)
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Cited
US1745939A
Cited
US2057431A
Cited
US2341219A
Cited
US2575383A
Cited
US2487581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |