Patent US3091240A successfully refreshed from Google Patents.
US3091240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe and ventable closure means
Assignee: Individual
•
Filing: 1958-12-29
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Granted: 1963-05-28
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert K Mcconnaughey
- 👤 Milton J Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:14
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31596; A61M5/32; A61M5/34; A61M2005/3128; A61M5/28; A61M5/285; A61M5/286; A61M5/3148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A CONTAINER WHICH HAS A TRANSPARENT CYLINDRICAL PORTION COMMUNICATING WITH AN OPENING AT ONE END AND WHICH IS ADAPTED TO BE FILLED OR EMPTIED BY INCREASING OR REDUCING ITS INTERNAL VOLUME, SAID CONTAINER HAVING VENTABLE CLOSURE MEANS CONSISTING OF A FLOATING PISTON MOUNTED RECIPROCALLY IN SAID TRANSPARENT CYLINDRICAL PORTIONG OF SAID CONTAINER, SAID FLOATING PISTON INCLUDING AN ANNULUS WITH A CENTRAL CYLINDRICAL OPENING COAXIAL WITH SAID CYLINDRICAL PORTION OF SAID CONTAINER AND AN ELASTIC MEMBRANCE CLOSING SAID CENTRAL CYLINDRICAL OPENING OF SAID FLOATING PISTON SAID MEMBRANCE BEING PERFORATED, SAID MEMBRANE AND EACH PERFORATION THEREIN BEING SO DIMENSIONED THAT EACH SAID PERFORATION WILL REMAIN CLOSED TO SEAL SAID TRANSPARENT CYLINDRICAL PORTION AGAINST THE PASSAGE OF LIQUID, GASEOUS OR POWDERED MATERIALS WHEN SUBJECTED TO POSITIVE OR NEGATIVE PRESSURES WITHIN SAID CONTAINER THAT ARE LESS THAN THOSE CREATED BY ACTUATION OF THE
Claim 2
Dependent Claim
139 words
A CONTAINER WHICH HAS A TRANSPARENT CYLINDRICAL PORTION COMMUNICATING WITH AN OPENING AT ONE END AND WHICH IS ADAPTED TO BE FILLED OR EMPTIED BY INCREASING OR REDUCING ITS INTERNAL VOLUME, SAID CONTAINER HAVING VENTABLE CLOSURE MEANS CONSISTING OF A FLOATING PISTON MOUNTED RECIPROCALLY IN SAID TRANSPARENT CYLINDRICAL PORTIONG OF SAID CONTAINER, SAID FLOATING PISTON INCLUDING AN ANNULUS WITH A CENTRAL CYLINDRICAL OPENING COAXIAL WITH SAID CYLINDRICAL PORTION OF SAID CONTAINER AND AN ELASTIC MEMBRANCE CLOSING SAID CENTRAL CYLINDRICAL OPENING OF SAID FLOATING PISTON SAID MEMBRANCE BEING PERFORATED, SAID MEMBRANE AND EACH PERFORATION THEREIN BEING SO DIMENSIONED THAT EACH SAID PERFORATION WILL REMAIN CLOSED TO SEAL SAID TRANSPARENT CYLINDRICAL PORTION AGAINST THE PASSAGE OF LIQUID, GASEOUS OR POWDERED MATERIALS WHEN SUBJECTED TO POSITIVE OR NEGATIVE PRESSURES WITHIN SAID CONTAINER THAT ARE LESS THAN THOSE CREATED BY ACTUATION OF THE
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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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |