US2724216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating electrode spacers
Assignee: AT&T Inc
•
Filing: 1950-06-22
•
Granted: 1955-11-22
•
Expires: 1970-06-22
Abstract
No abstract record available.
Inventors
- 👤 Luther E Cisne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:05
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; Y; Y10; Y10S; Y10S264/00; Y10S264/53; Y10S264/75; Y10S425/00; Y10S425/037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1815146A
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US1922673A
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US1951612A
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US2204288A
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US2224484A
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US2271829A
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US2213797A
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US2561520A
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US2344601A
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US2443617A
Cited
US2550893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |