US3440016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorimetric analyzer
Assignee: Bull and Roberts Inc
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Filing: 1966-09-26
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Granted: 1969-04-22
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Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Earl J Serfass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:11
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N35/00; G01N35/10; G01N35/1095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A CHEMICAL ANALYZER FOR CONTINUOUSLY MIXING ACCURATELY CONTROLLED AMOUNTS OF LIQUID SAMPLE AND REAGENT IN A MANNER SUCH THAT THE FLOW OF REAGENT WILL BE STOPPED WHEN THE SUPPLY OF SAMPLE IS DEPLETED, SAID ANALYZER COMPRISING: A REAGENT BOTTLE HAVING AN OUTLET SUPPLYING REAGENT AT ZERO PRESSURE HEAD, A LIQUID SAMPLE VESSEL HAVING AN OUTLET SUPPLYING LIQUID SAMPLE AT A CONSTANT PRESSURE HEAD, A MIXING CHAMBER, A FIRST CAPILLARY OF ACCURATELY DETERMINED INSIDE DIAMETER CONNECTED BETWEEN THE OUTLET OF SAID REAGENT BOTTLE AND SAID MIXING CHAMBER, A SECOND CAPILLARY OF ACCURATELY DETERMINED INSIDE DIAMETER CONNECTED BETWEEN THE OUTLET OF SAID LIQUID SAMPLE VESSEL AND SAID MIXING CHAMBER, AND A DRAIN TUBE HAVING ONE END CONNECTED TO AN OUTLET OF SAID MIXING CHAMBER AND HAVING THE OTHER END POSITIONED AT A FIXED DISTANCE BELOW SAID MIXING CHAMBER WHEREBY THE NEGATIVE PRESSURE HEAD AT SAID OTHER END OF SAID DRAIN TUBE PROVIDES SUCTION FOR MIXING ACCURATELY CONTROLLED AMOUNTS OF LIQUID SAMPLE AND REAGENT IN SAID MIXING CHAMBER.
Claim 2
Dependent Claim
165 words
A CHEMICAL ANALYZER FOR CONTINUOUSLY MIXING ACCURATELY CONTROLLED AMOUNTS OF LIQUID SAMPLE AND REAGENT IN A MANNER SUCH THAT THE FLOW OF REAGENT WILL BE STOPPED WHEN THE SUPPLY OF SAMPLE IS DEPLETED, SAID ANALYZER COMPRISING: A REAGENT BOTTLE HAVING AN OUTLET SUPPLYING REAGENT AT ZERO PRESSURE HEAD, A LIQUID SAMPLE VESSEL HAVING AN OUTLET SUPPLYING LIQUID SAMPLE AT A CONSTANT PRESSURE HEAD, A MIXING CHAMBER, A FIRST CAPILLARY OF ACCURATELY DETERMINED INSIDE DIAMETER CONNECTED BETWEEN THE OUTLET OF SAID REAGENT BOTTLE AND SAID MIXING CHAMBER, A SECOND CAPILLARY OF ACCURATELY DETERMINED INSIDE DIAMETER CONNECTED BETWEEN THE OUTLET OF SAID LIQUID SAMPLE VESSEL AND SAID MIXING CHAMBER, AND A DRAIN TUBE HAVING ONE END CONNECTED TO AN OUTLET OF SAID MIXING CHAMBER AND HAVING THE OTHER END POSITIONED AT A FIXED DISTANCE BELOW SAID MIXING CHAMBER WHEREBY THE NEGATIVE PRESSURE HEAD AT SAID OTHER END OF SAID DRAIN TUBE PROVIDES SUCTION FOR MIXING ACCURATELY CONTROLLED AMOUNTS OF LIQUID SAMPLE AND REAGENT IN SAID MIXING CHAMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |