US2163409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic-to-metal seal
Assignee: General Electric Co
•
Filing: 1937-11-22
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Granted: 1939-06-20
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Expires: 1957-11-22
Abstract
No abstract record available.
Inventors
- 👤 Pulfrich Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:05
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/224; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; F; F16; F16B; F16B9/00; F16B9/01; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/125; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/345; C04B2237/346; C04B2237/348; C04B2237/40; C04B2237/403; C04B2237/405; C04B2237/50; C04B2237/59; C04B2237/592; C04B2237/62; C04B2237/64; C04B2237/72; C04B2237/76; C04B2237/765; C04B2237/78; C04B2237/84
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) | 1942-06-19 | 1942-12-19 | 1943-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-19 | 1946-12-19 | 1947-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-19 | 1950-12-19 | 1951-06-20 | $7700.00 | Window Closed / Lapsed |