US3832134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tlc method and device for detecting the presence of target substances in unknown solutions
Assignee: Individual
•
Filing: 1971-10-04
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Granted: 1974-08-27
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Expires: 1991-10-04
Abstract
Abstract TLC METHOD AND DEVICE FOR TESTING URINE OR OTHER BODY FLUIDS FOR THE PRESENCE OF TARGET SUBSTANCES. THE DEVICE INCLUDES (1) A THIN LAYER CHROMATOGRAPHIC PLATE INTO WHICH TARGET STANDARDS HAVE BEEN INCORPORATED AT SELECTED STARTING POINTS AND (2) A PHOTODIAGRAM SHOWING THE APPEARANCE OF A DEVELOPED PLATE WHICH HAD BEEN PREPARED WITH THE SAME TARGET STANDARDS. COMPARISON, AFTER DEVELOPMENT, OF THE PLATE TO WHICH A TEST SOLUTION HAD BEEN APPLIED, TO THE PHOTODIAGRAM VERIFIES THE TEST PROCEDURE WHILE ALSO DETERMINING THE PRESENCE OR ABSENCE OF THE TARGET SUBSTANCES IN THE TEST SOLUTION.
Inventors
- 👤 D Sohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:09
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/95; Y; Y10; Y10S; Y10S436/00; Y10S436/901; Y10T; Y10T436/00; Y10T436/10; Y10T436/14; Y10T436/141111; Y10T436/145555; Y10T436/147777; Y10T436/17; Y10T436/173845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |