US3561875A
Expired / Lapsed
US
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Turbidimeter
Assignee: BAE Systems Space & Mission Systems Inc
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Filing: 1967-04-27
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Granted: 1971-02-09
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Expires: 1987-04-27
Abstract
Abstract AN ELECTRO-OPTICAL DEVICE CAPABLE OF SEQUENTIALLY TESTING A PREDETERMINED PLURALITY OF SOLUTIONS FOR PARTICLE PRESENCE AT PRESELECTED INTERVALS. PARTICLE PRESENCE IS INDICATED BY DEVELOPING A CURRENT WHEN LIGHT PASSING THROUGH THE SOLUTION UNDER TEST IS SCATTERED BY PARTICLES IN THE SOLUTION. CONTROL FOR THE DEVICE IS PROVIDED BY TIMING CIRCUITRY WHEREIN THE TIMING INTERVALS, AS WELL AS THE TOTAL NUMBER OF SAMPLES TOP BE SEQUENTIALLY TESTED, ARE MADE SELECTABLE.
Inventors
- 👤 Louis Ried Jr
- 👤 Charles A Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:31
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/25; G01N21/251; G01N21/253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |