US4721680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of using micro pipette tips
Assignee: SORENSEN BIOSCIENCE Inc
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Filing: 1986-11-13
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Granted: 1988-01-26
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Expires: 2006-11-13
Abstract
Abstract Low cost medical micro pipette tips for difficult to reach places, and related methods. The leading or distal portion of the micro pipette tips are materially elongated and ultra thin. This accommodates placement of the distal influent port, for receiving expensive biological extracts, in hard to reach places.
Inventors
- 👤 David H. Jeffs
- 👤 Paul M. Jessop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:32
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/0275; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/2575
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A method of withdrawing liquid to be tested from a container, such as a vial or test tube, comprising the steps of: providing a micro pipette tip having a flexible distal end portion and a central passageway therein; inserting the distal end portion of the micro pipette tip into a container containing liquid to be tested and forcibly deflecting the distal end portion including said central passageway of the micro pipette tip against a bottom of the container into an angular configuration without occlusion of the central passageway of the micro pipette tip; withdrawing substantially all of the liquid from the container into the micro pipette tip through the angularly disposed central passageway.
Claim 2
Independent Claim
113 words
A method of withdrawing liquid to be tested from a container, such as a vial or test tube, comprising the steps of: providing a micro pipette tip having a flexible distal end portion and a central passageway therein; inserting the distal end portion of the micro pipette tip into a container containing liquid to be tested and forcibly deflecting the distal end portion including said central passageway of the micro pipette tip against a bottom of the container into an angular configuration without occlusion of the central passageway of the micro pipette tip; withdrawing substantially all of the liquid from the container into the micro pipette tip through the angularly disposed central passageway.
Claim 3
Independent Claim
123 words
A method of discharging biological solutions from a micro pipette tip into an electrophoresis testing environment comprising the steps of: providing a micro pipette tip having a flexible flattened distal end portion, a proximal end portion and a central passageway therein with liquid comprising biological solution being disposed in the passageway; orienting the distal end of the micro pipette tip so that the flattened dimension is in substantially parallel relation with a narrow slot between spaced plates in an electrophoresis testing environment and inserting the flattened distal end of the micro pipette tip through the slot into a liquid-receiving well; discharging the biological solution from the central passageway of the micro pipette tip into the well for subsequent electrophoresis testing of the liquid.
Claim 4
Independent Claim
123 words
A method of discharging biological solutions from a micro pipette tip into an electrophoresis testing environment comprising the steps of: providing a micro pipette tip having a flexible flattened distal end portion, a proximal end portion and a central passageway therein with liquid comprising biological solution being disposed in the passageway; orienting the distal end of the micro pipette tip so that the flattened dimension is in substantially parallel relation with a narrow slot between spaced plates in an electrophoresis testing environment and inserting the flattened distal end of the micro pipette tip through the slot into a liquid-receiving well; discharging the biological solution from the central passageway of the micro pipette tip into the well for subsequent electrophoresis testing of the liquid.
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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) | 1991-01-25 | 1991-07-27 | 1992-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-25 | 1995-07-27 | 1996-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-25 | 1999-07-27 | 2000-01-26 | $7700.00 | Window Closed / Lapsed |