Patent US3504236A successfully refreshed from Google Patents.
US3504236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proximity switch
Assignee: Omron Corp
•
Filing: 1966-11-23
•
Granted: 1970-03-31
•
Expires: 1986-11-23
Abstract
No abstract record available.
Inventors
- 👤 Takesi Miyagawa
- 👤 Masayuki Oyagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:57
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/945; H03K17/955
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2267445A
Cited
US2492388A
Cited
US2573172A
Cited
US2708746A
Cited
US2768355A
Cited
US2963627A
Cited
US3147408A
Cited
US3201774A
Cited
US3292052A
Cited
US3248691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |