US3454869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proximity sensing system
Assignee: ELECTRO DEV CORP
•
Filing: 1966-12-23
•
Granted: 1969-07-08
•
Expires: 1986-12-23
Abstract
No abstract record available.
Inventors
- 👤 Bruno Strauss
- 👤 Robert B Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:01
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/945; H03K17/95; H03K17/9512; H03K17/9505; H03K17/952; H03K17/9525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2481345A
Cited
US2901676A
Cited
US2944213A
Cited
US2994015A
Cited
US2980837A
Cited
US3284082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |