Patent US2991594A successfully refreshed from Google Patents.
US3285296A
Expired / Lapsed
US
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Pipette apparatus
Assignee: Beckman Coulter Inc
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Filing: 1964-04-24
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Granted: 1966-11-15
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Expires: 1984-04-24
Abstract
No abstract record available.
Inventors
- 👤 Ishimaru Kenzo
- 👤 Robert C Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:30
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/54; B01L9/543; B01L3/00; B01L3/02; B01L3/021; A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31525; A61M5/31531; A61M5/32; A61M5/34; A61M5/346; A61M5/347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
PIPETTE APPARATUS COMPRISING AN ELONGATED PIPETTE ELEMENT HAVING A FLUID TRANSFER END, A MOUNTING END, AND A HOLLOW BORE THEREBETWEEN TO DEFINE A PREDETERMINED VOLUME OF LIQUID THEREIN, A RESILIENT SQUEEZE BULB AT SAID MOUNTING END FOR SLECTIVELY SUPPLYING EITHER POSITIVE OR NEGATIVE PRESSURE TO THE BORE AT THE MOUNTING END OF THE ELEMENT TO RESPECTIVELY EXPEL OR DRAW LIQUID INTO THE BORE VIA THE FLUID TRANSFER END, A SEMI-PERMEABLE MEMBER, IMPERVIOUS TO LIQUID AND PERVIOUS TO GAS, DISPOSED TO BLOCK THE BORE AT THE MOUNTING END OF SAID PIPETTE ELEMENT TO LIMIT THE FURTHER INTAKE OF LIQUID WHILE PERMITTING LIQLUID TO BE EXPELLED FROM THE BORE BY APPLYING AIR UNDER PRESSURE THERETO BY SAID SQUEEZE BULB, AND MEANS FORMING AN AIR VENT CONNECTING THE INTERIOR OF THE SQUEEZE BULB TO THE OUTSIDE SURROUNDINGS VIA SAID MEMBER TO AUTOMATICALLY RELIEVE VACUUM WITHIN THE SQUEEZE BULB AND TO PERMIT SUCH BULB TO RETURN TO A RELAXED POSITION FOLLOWING RELEASE THEREOF.
Claim 2
Dependent Claim
159 words
PIPETTE APPARATUS COMPRISING AN ELONGATED PIPETTE ELEMENT HAVING A FLUID TRANSFER END, A MOUNTING END, AND A HOLLOW BORE THEREBETWEEN TO DEFINE A PREDETERMINED VOLUME OF LIQUID THEREIN, A RESILIENT SQUEEZE BULB AT SAID MOUNTING END FOR SLECTIVELY SUPPLYING EITHER POSITIVE OR NEGATIVE PRESSURE TO THE BORE AT THE MOUNTING END OF THE ELEMENT TO RESPECTIVELY EXPEL OR DRAW LIQUID INTO THE BORE VIA THE FLUID TRANSFER END, A SEMI-PERMEABLE MEMBER, IMPERVIOUS TO LIQUID AND PERVIOUS TO GAS, DISPOSED TO BLOCK THE BORE AT THE MOUNTING END OF SAID PIPETTE ELEMENT TO LIMIT THE FURTHER INTAKE OF LIQUID WHILE PERMITTING LIQLUID TO BE EXPELLED FROM THE BORE BY APPLYING AIR UNDER PRESSURE THERETO BY SAID SQUEEZE BULB, AND MEANS FORMING AN AIR VENT CONNECTING THE INTERIOR OF THE SQUEEZE BULB TO THE OUTSIDE SURROUNDINGS VIA SAID MEMBER TO AUTOMATICALLY RELIEVE VACUUM WITHIN THE SQUEEZE BULB AND TO PERMIT SUCH BULB TO RETURN TO A RELAXED POSITION FOLLOWING RELEASE THEREOF.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |