US2509906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-to-metal seal
Assignee: AT&T Inc
•
Filing: 1942-03-13
•
Granted: 1950-05-30
•
Expires: 1962-03-13
Abstract
No abstract record available.
Inventors
- 👤 James E Clark
- 👤 Victor L Ronci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0041; H01J2893/0043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190416971A
Cited
US1844936A
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US1958263A
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US1942042A
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US1865752A
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FR689836A
Cited
US1935989A
Cited
US1940870A
Cited
US2075057A
Cited
US2200694A
Cited
US2198007A
Cited
US2345278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |