US2551420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gastight electrode seal
Assignee: Siemens SpA
•
Filing: 1949-04-14
•
Granted: 1951-05-01
•
Expires: 1969-04-14
Abstract
No abstract record available.
Inventors
- 👤 Conti Giampietro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:44
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/10; H05B7/103; H05B7/105
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE386631C
Cited
US846521A
Cited
GB130205A
Cited
DE407827C
Cited
US1496231A
Cited
DE379612C
Cited
US1508486A
Cited
US1715376A
Cited
FR636946A
Cited
US1858455A
Cited
US2154737A
Cited
US2226747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |