US3450115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-fuel ratio control device for internal combustion engines
Assignee: Toyota Motor Corp
•
Filing: 1967-04-24
•
Granted: 1969-06-17
•
Expires: 1987-04-24
Abstract
No abstract record available.
Inventors
- 👤 Tadahide Toda
- 👤 Kenji Gotoh
- 👤 Haruyuki Obata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:54
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/02; F02M23/03; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749; Y10T137/775; Y10T137/7751
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319166A
Cited
US998355A
Cited
US1945603A
Cited
US2107874A
Cited
US2439573A
Cited
US2506511A
Cited
US3150649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |