US3607094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pipetting and adding a liquid
Assignee: Autokemi AB
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Filing: 1969-01-27
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Granted: 1971-09-21
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Expires: 1989-01-27
Abstract
Abstract An apparatus for pipetting a liquid sample and supplying a liquid reagent which comprises a pump cylinder, a pump piston insertable in said pump cylinder, actuating means for said pump piston, a tubular cannula connected to said pump cylinder for drawing up a liquid sample, a conduit for supplying liquid reagent to said pump cylinder, said conduit having provided therein a valve means adapted to be actuated to its open position when the pump piston reaches a position corresponding to an emptying of the pump cylinder.
Inventors
- 👤 Palle-Finn Beer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:21
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097; B; B01; B01L; B01L3/00; B01L3/02; B01L3/0203; B01L3/0206; B01L3/021; B01L3/0217; G01N1/00; G01N1/28; G01N1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
The apparatus of claim 1 wherein the valve means comprises a valve element held in closed position by spring means and the pump piston has the form of a rod-shaped displacement piston for lifting said valve element from said closed position.
Claim 2
Dependent Claim
39 words
The apparatus of claim 1 wherein the actuating means comprises an actuating piston slidably disposed and spring-loaded in a housing, said actuating piston being connected to said pump, and means for supplying compressed air to drive said actuating piston.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |