US2310575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition system for internal combustion engines
Assignee: Shell Development Co
•
Filing: 1940-05-17
•
Granted: 1943-02-09
•
Expires: 1960-05-17
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Cattaneo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:28
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/02; H01T13/16; F; F02; F02P; F02P13/00
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) | 1946-02-08 | 1946-08-10 | 1947-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-08 | 1950-08-10 | 1951-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-08 | 1954-08-10 | 1955-02-09 | $7700.00 | Window Closed / Lapsed |