Patent US3876579A successfully refreshed from Google Patents.
Patent US3586933A successfully refreshed from Google Patents.
Patent US1968314A successfully refreshed from Google Patents.
US1968314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug and method of making the same
Assignee: Federal Mogul Ignition LLC
•
Filing: 1933-01-14
•
Granted: 1934-07-31
•
Expires: 1953-01-14
Abstract
No abstract record available.
Inventors
- 👤 Otto C Rohde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:02
CPC Classifications
H; H01; H01T; H01T21/00; H01T21/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/49947; Y10T29/49966; Y10T29/49968
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) | 1937-07-30 | 1938-01-29 | 1938-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-30 | 1942-01-29 | 1942-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-30 | 1946-01-29 | 1946-07-31 | $7700.00 | Window Closed / Lapsed |