US3205104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of interdigital delay lines
Assignee: Northrop Grumman Systems Corp
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Filing: 1961-07-10
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Granted: 1965-09-07
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert C Sibley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:36
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A METHOD OF MANUFACTURING AN INTERDIGITAL DELAY LINE, THE STEPS COMPRISING FIXING TRIPARTITE METALLIC BARS OF UNIFORM CROSS SECTION INTO SPACED SLOTS IN OPPOSED PARALLEL FLANGES OF A METAL CHANNEL AND FLUSH WITH THE UPPER SURFACES OF THE FLANGES AND SEPARATING SAID BARS FROM ONE OF THE FLANGES BY REMOVING ONE OF THE TRIPARTITE PORTIONS OF EACH BAR ADJACENT TO A FLANGE, THE PORTIONS REMOVED FROM THE BARS ALTERNATING SO THAT THEY ARE ADJACENT OPPOSITE ENDS THEREOF, SAID METHOD BEING FURTHER CHARACTERIZED BY EACH OF THE BARS BEING COMPRISED OF A LONG SECTIONS OF A HARD METAL, AN INTERMEDIATE SECTION OF A SOFT METAL AND AN END SECTION OF A HARD METAL, THE BARS ALTERNATING WITH RESPECT TO THE POSITIONS OF THE SOFT SECTION, AND SAID SEPARATION OF THE BARS BEING EFFECTED BY ABRADING AWAY THE SOFT METAL.
Claim 2
Dependent Claim
139 words
IN A METHOD OF MANUFACTURING AN INTERDIGITAL DELAY LINE, THE STEPS COMPRISING FIXING TRIPARTITE METALLIC BARS OF UNIFORM CROSS SECTION INTO SPACED SLOTS IN OPPOSED PARALLEL FLANGES OF A METAL CHANNEL AND FLUSH WITH THE UPPER SURFACES OF THE FLANGES AND SEPARATING SAID BARS FROM ONE OF THE FLANGES BY REMOVING ONE OF THE TRIPARTITE PORTIONS OF EACH BAR ADJACENT TO A FLANGE, THE PORTIONS REMOVED FROM THE BARS ALTERNATING SO THAT THEY ARE ADJACENT OPPOSITE ENDS THEREOF, SAID METHOD BEING FURTHER CHARACTERIZED BY EACH OF THE BARS BEING COMPRISED OF A LONG SECTIONS OF A HARD METAL, AN INTERMEDIATE SECTION OF A SOFT METAL AND AN END SECTION OF A HARD METAL, THE BARS ALTERNATING WITH RESPECT TO THE POSITIONS OF THE SOFT SECTION, AND SAID SEPARATION OF THE BARS BEING EFFECTED BY ABRADING AWAY THE SOFT METAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |