Patent US3701601A successfully refreshed from Google Patents.
US3701601A
Expired / Lapsed
US
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Photometric read out and analyzing system
Assignee: Sherwood Medical Co
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Filing: 1970-09-17
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Granted: 1972-10-31
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Expires: 1990-09-17
Abstract
Abstract A SERVOMECHANISM SYSTEM COUPLED TO A SPECTROPHOTOMETER PROVIDES DIRECT READ OUT OF THE TRANSMITTANCE OF A SOLUTION BEING ANALYZED. CIRCUITS SELECTIVELY CONNECTABLE IN THE SYSTEM CONVERT TRANSMITTANCE INTO THE NONLINEAR FUNCTIONS OF OPTICAL DENSITY, CONCENTRATION AND RATE OF CHEMICAL REACTION, WHICH ARE ALSO DIRECTLY READ OUT BY THE SERVOMECHANISM. ADDITIONAL CIRCUITS PROVIDE NOISE SUPPRESSION AND CAUSE THE SEVOMECHANISM TO BE RESPONSIVE TO THE TIME DURATION AN INPUT IS OFF NULL.
Inventors
- 👤 William H Plumpe Jr
- 👤 Theodore E Weichselbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:42
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27; G01N21/272; G06; G06G; G06G7/00; G06G7/48; G06G7/75; Y; Y10; Y10S; Y10S435/00; Y10S435/808
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |