US3281023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Micrometer controlled leak-proof syringe
Assignee: Individual
•
Filing: 1965-03-31
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Granted: 1966-10-25
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Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Stephen D Bruck
- 👤 Ruth G Rector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:58
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31565; A61M5/3159; A61M5/31591; A61M5/31511; A61M5/31513; A61M5/31576; A61M5/31583; A61M5/31586; A61M5/31533; A61M5/31545; A61M5/31548; A61M5/31555; A61M5/31561; A61M5/31563
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A MICROMETER CONTROLLED LEAK-PROOF SYRINGE COMPRISING: AN OUTER BARREL FORMED OF A TRANSPARENT MATERIAL; A SLEEVE SLIDABLY DISPOSED WITHIN SAID BARREL, SAID SLEEVE EXTENDING THROUGHOUT A SUBSTANTIAL PORTION OF THE AXIAL LENGTH OF SAID BARREL, SAID SLEEVE HAVING A TAPPED BORE AT ONE END THEREOF; MEANS RELEASABLY SECURING SAID SLEEVE TO SAID BARREL; A ROTATABLE PISTON ROD COAXIALLY DISPOSED WITHIN SAID BARREL AND THREADABLY ENGAGING THE TAPPED BORE OF SAID SLEEVE; A ROTATABLE PISTON SECURED TO SAID PISTON ROD AND COAXIALLY DISPOSED WITHIN SAID BARREL; ANNULAR SEAL MEANS DISPOSED ON SAID PISTON AND CONTACTING THE INSIDE SURFACE OF SAID BARREL; AND MEANS TO PREVENT ROTATION OF SAID SEAL ON SAID PISTON AS SAID PISTON IS ROTATED IN SAID BARREL.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |