US3751340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting the presence and concentration of heme-containing particles and heavy metal ions in fluid media
Assignee: Aerojet Rocketdyne Inc
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Filing: 1971-05-06
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Granted: 1973-08-07
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Expires: 1991-05-06
Abstract
Abstract THE FREQUENCY AND AMPLITUDE OF WHOSE OUPUT IS A FUNCTION OF THE CONCENTRATION OF THE CONTAMINANT. DISCLOSED IS A METHOD AND APPARATUS FOR DETECTING, IN FLUID MEDIA, THE PRESENCE AND CONCENTRATION OF HEMECONTAINING PARTICLES, SUCH AS MICROORGANISM, AND HEAVY METAL IONS. THE DETECTION IS ACCOMPLISHED BY OBSERVING THE LIGHT SCATTERED BY BUBBLES OF OXYGEN FORMED BY THE CATALYSTIC DECOMPOSITION OF HYDROGEN PEROXIDE BY THE IONS OR BY THE HEME FOUND IN THE PARTICLES. MICROORGANISMS NOT NATURALLY POSSESSING HEME MAY BE DETECTED BY THIS METHOD BY PRELIMINARILY STAINING THEM WITH THE ENZYME CATALASE. THE SCATTERED LIGHT IS DETECTED BY A PHOTOCELL,
Inventors
- 👤 S Witz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:07
CPC Classifications
C; C12; C12Q; C12Q1/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/88; Y10S435/881; Y10T; Y10T436/00; Y10T436/14; Y10T436/145555; Y10T436/146666
Claims Analysis
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |