US3290946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipetting device
Assignee: Dow Chemical Co
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Filing: 1964-05-25
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Granted: 1966-12-13
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Pursell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/021; B01L3/0217
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN A SYRINGE EMPLOYED AS A MANUAL PIPETTE FILLING AND DISPENSING DEVICE AND HAVING A HOLLOW CYLINDRICAL PLUNGER AND A COMPLEMENTARY BARREL, SAID PLUNGER AND BARREL FITTING TOGETHER IN SLIDING, SEALING RELATION, AND SAID BARREL HAVING A DISPENSING END, THE IMPROVEMENT WHICH CONSISTS IN: (A) SPRING MEANS ADAPTED TO RESILIENTLY URGE THE PLUNGER OUTWARDLY OF THE BARREL OF THE SYRINGE THROUGHOUT A SUBSTANTIAL STROKE RELATIVE TO THE BARREL; (B) AN ADAPTER SEALINGLY ATTACHED TO THE DISPENSING END OF THE BARREL, SAID ADAPTER BEING ADAPTED TO RECEIVER AND HOLD A PIPETTE IN SEALING RELATIONSHIP IN AN OPENING THEREIN; (C) AND A FIRST OPENING THROUGH THE FINGER-ENGAGING TOP OF THE PLUNGER FOR FINGERTIP CONTROL OF DISPENSING, SAID FIRST OPENING COMMUNICATING THROUGH THE HOLLOW PLUNGER WITH A SECOND OPENING PROVIDED THROUGH THE BOTTOM OF THE PLUNGER, SAID SECOND OPENING IN TURN COMMUNICATING THROUGH THE BARREL WTIH AN OPENING THROUGH THE DISPENSING END OF SAID BARREL, AND SAID OPENING THROUGH THE DISPENSING END OF THE BARREL COMMUNICATING WITH A CHANNEL IN THE ADPATER WHICH COMMUNICATES WITH THE PIPETTE RECEPTIVE OPENING.
Claim 2
Dependent Claim
176 words
IN A SYRINGE EMPLOYED AS A MANUAL PIPETTE FILLING AND DISPENSING DEVICE AND HAVING A HOLLOW CYLINDRICAL PLUNGER AND A COMPLEMENTARY BARREL, SAID PLUNGER AND BARREL FITTING TOGETHER IN SLIDING, SEALING RELATION, AND SAID BARREL HAVING A DISPENSING END, THE IMPROVEMENT WHICH CONSISTS IN: (A) SPRING MEANS ADAPTED TO RESILIENTLY URGE THE PLUNGER OUTWARDLY OF THE BARREL OF THE SYRINGE THROUGHOUT A SUBSTANTIAL STROKE RELATIVE TO THE BARREL; (B) AN ADAPTER SEALINGLY ATTACHED TO THE DISPENSING END OF THE BARREL, SAID ADAPTER BEING ADAPTED TO RECEIVER AND HOLD A PIPETTE IN SEALING RELATIONSHIP IN AN OPENING THEREIN; (C) AND A FIRST OPENING THROUGH THE FINGER-ENGAGING TOP OF THE PLUNGER FOR FINGERTIP CONTROL OF DISPENSING, SAID FIRST OPENING COMMUNICATING THROUGH THE HOLLOW PLUNGER WITH A SECOND OPENING PROVIDED THROUGH THE BOTTOM OF THE PLUNGER, SAID SECOND OPENING IN TURN COMMUNICATING THROUGH THE BARREL WTIH AN OPENING THROUGH THE DISPENSING END OF SAID BARREL, AND SAID OPENING THROUGH THE DISPENSING END OF THE BARREL COMMUNICATING WITH A CHANNEL IN THE ADPATER WHICH COMMUNICATES WITH THE PIPETTE RECEPTIVE OPENING.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |