US2355443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sealing spark plug electrodes in ceramic insulators
Assignee: Federal Mogul Ignition LLC
•
Filing: 1942-02-23
•
Granted: 1944-08-08
•
Expires: 1962-02-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Jeffery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:37
CPC Classifications
H; H01; H01T; H01T21/00; H01T21/02; Y; Y10; Y10S; Y10S264/00; Y10S264/71; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1947-08-08 | 1948-02-07 | 1948-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-08 | 1952-02-07 | 1952-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-08 | 1956-02-07 | 1956-08-08 | $7700.00 | Window Closed / Lapsed |