US2144558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-tight insulated lead-in structure
Assignee: Westinghouse Electric Corp
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Filing: 1937-02-20
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Granted: 1939-01-17
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Expires: 1957-02-20
Abstract
No abstract record available.
Inventors
- 👤 Walter E Bahls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:16
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J5/40; H01J5/42; H01J13/00; H01J13/02; H01J13/34; H01J2893/00; H01J2893/0033; H01J2893/0034; H01J2893/0072; H01J2893/0073; H01J2893/0074; H01J2893/0087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-01-16 | 1942-07-18 | 1943-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-16 | 1946-07-18 | 1947-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-16 | 1950-07-18 | 1951-01-17 | $7700.00 | Window Closed / Lapsed |