Patent US2977506A successfully refreshed from Google Patents.
US2977506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic ignition system
Assignee: Motors Liquidation Co
•
Filing: 1959-10-29
•
Granted: 1961-03-28
•
Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Brooks H Short
- 👤 Richard L Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:17
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/32; F; F02; F02P; F02P3/00; F02P3/06; F02P3/08; F02P3/0807
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |