US3474252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror arrangement light source and photocell located on a common axis
Assignee: EJNAR JENSEN AND SON IS
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Filing: 1965-10-23
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Granted: 1969-10-21
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Ulf J Jacobsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:29
CPC Classifications
G; G01; G01V; G01V8/00; G01V8/10; G01V8/12; G01V8/14; G02; G02B; G02B19/00; G02B19/0004; G02B19/0019; G02B19/0023; G02B19/0028; G02B19/0033; G02B19/0085
Claims Analysis
Total Claims: 0
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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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |