US3291128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe construction with sealable vent means
Assignee: Individual
•
Filing: 1964-01-24
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Granted: 1966-12-13
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Expires: 1984-01-24
Abstract
No abstract record available.
Inventors
- 👤 John G O'neil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/3129; A61M2005/3123; A61M5/315; A61M5/31511
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A HYPODERMIC SYRINGE OF THE TYPE DESCRIBED HAVING IN COMBINATION, A CYLINDRICAL BARREL, A PLUNGER EXTENDING WITHIN SAID BARREL, A PISTON CARRIED AT THE INNER END OF SAID PLUNGER, SAID BARREL HAVING A PLURALITY OF LONGITUDINALLY EXTENDING GROOVES FORMED IN THE INNER WALL THEREOF, SAID PISTON HAVING AN ANNULAR FLEXIBLE RIB THEREABOUT, SAID RIB BEING OVERSIZED SUFFICIENTLY IN DIAMETER WITH RESPECT TO THE DIAMETER OF SAID BARREL TO HAVE SUFFICIENT COMPRESSION UPON BEING RECEIVED WITHIN SAID BARREL TO INITIALLY DEFORM INTO SEALING ENGAGEMENT WITH SAID GROOVES, AND SAID RIB BEING FORMED OF AN ELASTIC MATERIAL ON THE ORDER OF RUBBER OF SUCH A DUROMETER THAT UPON ROTATION OF SAID RIB IN BREAKING SAID INITIAL SEALING ENGAGEMENT, A LAG TIME FOR VENTING IS ALLOWED DURING WHICH SAID RIB ESTABLISHES A RESEALING ENGAGEMENT WITH SAID GROOVES AND SAID BARREL IN ITS CHANGED POSITION.
Claim 2
Dependent Claim
141 words
A HYPODERMIC SYRINGE OF THE TYPE DESCRIBED HAVING IN COMBINATION, A CYLINDRICAL BARREL, A PLUNGER EXTENDING WITHIN SAID BARREL, A PISTON CARRIED AT THE INNER END OF SAID PLUNGER, SAID BARREL HAVING A PLURALITY OF LONGITUDINALLY EXTENDING GROOVES FORMED IN THE INNER WALL THEREOF, SAID PISTON HAVING AN ANNULAR FLEXIBLE RIB THEREABOUT, SAID RIB BEING OVERSIZED SUFFICIENTLY IN DIAMETER WITH RESPECT TO THE DIAMETER OF SAID BARREL TO HAVE SUFFICIENT COMPRESSION UPON BEING RECEIVED WITHIN SAID BARREL TO INITIALLY DEFORM INTO SEALING ENGAGEMENT WITH SAID GROOVES, AND SAID RIB BEING FORMED OF AN ELASTIC MATERIAL ON THE ORDER OF RUBBER OF SUCH A DUROMETER THAT UPON ROTATION OF SAID RIB IN BREAKING SAID INITIAL SEALING ENGAGEMENT, A LAG TIME FOR VENTING IS ALLOWED DURING WHICH SAID RIB ESTABLISHES A RESEALING ENGAGEMENT WITH SAID GROOVES AND SAID BARREL IN ITS CHANGED POSITION.
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 |