Patent US3922639A successfully refreshed from Google Patents.
US3423633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head lamp system with photoelectric switching and time delay extinguishing
Assignee: Denso Corp
•
Filing: 1966-05-27
•
Granted: 1969-01-21
•
Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Eiichi Kawai
- 👤 Masashi Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:34
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/53803; H02M7/53806; B; B60; B60Q; B60Q9/00; B60Q9/001; H02M7/4807
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |