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Patent US3531645A successfully refreshed from Google Patents.
US3531645A
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US
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Linear output photoelectric circuit with photoelectric and logarithmic cells in series
Assignee: Technicon Corp
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Filing: 1967-12-04
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Granted: 1970-09-29
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Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 Eduard B Marie De Jong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:21
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/16; G01J1/1626; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2482980A
Cited
US2661650A
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US3045125A
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US3340427A
Cited
US3443101A
Cited
US3428813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |