Patent US3253592A successfully refreshed from Google Patents.
US3253592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic syringe
Assignee: Don Baxter Inc
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Filing: 1962-06-08
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Granted: 1966-05-31
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Expires: 1982-06-08
Abstract
No abstract record available.
Inventors
- 👤 Pechmann Heinz A Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31511; A61M5/31513
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A HYPODERMIC SYRINGE COMPRISING: A THIN-WALLED ELONGATED BARREL FORMED OF RADIALLY EXPANDABLE THERMOPLASTIC MATERIAL AND HAVING A THROUGH BORE OPEN AT ONE END AND PARTIALLY CLOSED AT THE OPPOSITE END; AND A RIGID PLUNGER RECIPROCABLY SUPPORTED IN SAID BARREL BORE AND COMPRISING AN INTEGRAL SEALING TIP, CENTRAL BODY PORTION, AND THUMB REST PROJECTING OUT OF SAID BARREL, SAID PLUNGER COMPRISING AN INTEGRAL HOMOGENEOUS MASS OF THERMOPLASTIC MATERIAL, SAID CENTRAL BODY PORTION HAVING A CROSS SECTIONAL AREA SUBSTANTIALLY LESS THAN THE CROSS SECTIONAL AREA OF SAID BARREL BORE, SAID CENTRAL BODY PORTION INCLUDING A PLURALTIY OF RADIALLY PROJECTING, LONGITUDINALLY EXTENDING RAISED PORTIONS SPACED CIRCUMFERENTIALLY ABOUT THE AXIS OF SAID PLUNGER AND DISPOSED SUBSTANTIALLY ADJACENT AND SPACED REARWARDLY OF SAID SEALING TIP AND ENGAGING THE SURFACE OF THE BARREL BORE DURING THE TRAVEL OF SAID PLUNGER AND PREVENTING ANGULAR CANTING OF THE SEALING TIP AND BREAKING OF THE SEAL OF THE SEALING TIP WITH SAID BARREL BORE, SAID CENTRAL BODY PORTION CONVERGING FROM SAID RADIALLY PROJECTING RAISED PORTIONS TO A CENTRAL REAR PORTION OF SAID SEALING TIP, SAID SEALING TIP HAVING AN ANNULAR, CYLINDRICAL AND PERIPHERAL SEALING SURFACE SUBSTANTIALLY IN ALIGNMENT WITH THE LONGITUDINAL OUTER EDGES OF SAID RAISED PORTIONS, AND SAID SEALING SURFACE RADIALLY BIASING SAID BARREL OUTWARDLY ALONG THE PATH OF TRAVEL THEREOF.
Claim 2
Dependent Claim
213 words
A HYPODERMIC SYRINGE COMPRISING: A THIN-WALLED ELONGATED BARREL FORMED OF RADIALLY EXPANDABLE THERMOPLASTIC MATERIAL AND HAVING A THROUGH BORE OPEN AT ONE END AND PARTIALLY CLOSED AT THE OPPOSITE END; AND A RIGID PLUNGER RECIPROCABLY SUPPORTED IN SAID BARREL BORE AND COMPRISING AN INTEGRAL SEALING TIP, CENTRAL BODY PORTION, AND THUMB REST PROJECTING OUT OF SAID BARREL, SAID PLUNGER COMPRISING AN INTEGRAL HOMOGENEOUS MASS OF THERMOPLASTIC MATERIAL, SAID CENTRAL BODY PORTION HAVING A CROSS SECTIONAL AREA SUBSTANTIALLY LESS THAN THE CROSS SECTIONAL AREA OF SAID BARREL BORE, SAID CENTRAL BODY PORTION INCLUDING A PLURALTIY OF RADIALLY PROJECTING, LONGITUDINALLY EXTENDING RAISED PORTIONS SPACED CIRCUMFERENTIALLY ABOUT THE AXIS OF SAID PLUNGER AND DISPOSED SUBSTANTIALLY ADJACENT AND SPACED REARWARDLY OF SAID SEALING TIP AND ENGAGING THE SURFACE OF THE BARREL BORE DURING THE TRAVEL OF SAID PLUNGER AND PREVENTING ANGULAR CANTING OF THE SEALING TIP AND BREAKING OF THE SEAL OF THE SEALING TIP WITH SAID BARREL BORE, SAID CENTRAL BODY PORTION CONVERGING FROM SAID RADIALLY PROJECTING RAISED PORTIONS TO A CENTRAL REAR PORTION OF SAID SEALING TIP, SAID SEALING TIP HAVING AN ANNULAR, CYLINDRICAL AND PERIPHERAL SEALING SURFACE SUBSTANTIALLY IN ALIGNMENT WITH THE LONGITUDINAL OUTER EDGES OF SAID RAISED PORTIONS, AND SAID SEALING SURFACE RADIALLY BIASING SAID BARREL OUTWARDLY ALONG THE PATH OF TRAVEL 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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |