US3656480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe
Assignee: Individual
•
Filing: 1969-06-17
•
Granted: 1972-04-18
•
Expires: 1989-06-17
Abstract
Abstract A lightweight syringe is provided having a plastic foam plunger. The plunger is of unitary construction made of a plastic foam material and dimensioned so as to fit in the syringe body whereby the plastic foam material forms a resilient compression seal. The syringe can be disposed of after single use, or can be sterilized and reused, at the option of the user.
Inventors
- 👤 Jeanette Lois Rubricius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:29
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31511; A61M5/31513
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A syringe comprising, in combination, a syringe body having an aperture at an end thereof for entry of fluid into and exit of fluid from the body; a pumping plunger reciprocably movable in the body in a sliding fit in a manner to draw fluid into and expel fluid from the body via the aperture; said plunger being of a closed cell foamed plastic material and being dimensioned and so fitted in the body so that the foamed plastic material of the plunger forms a relatively fluid tight resilient compression seal against the body.
Claim 2
Dependent Claim
94 words
A syringe comprising, in combination, a syringe body having an aperture at an end thereof for entry of fluid into and exit of fluid from the body; a pumping plunger reciprocably movable in the body in a sliding fit in a manner to draw fluid into and expel fluid from the body via the aperture; said plunger being of a closed cell foamed plastic material and being dimensioned and so fitted in the body so that the foamed plastic material of the plunger forms a relatively fluid tight resilient compression seal against the body.
Claim 3
Dependent Claim
86 words
A syringe comprising, in combination, a syringe body having an aperture at an end thereof for entry of fluid into and exit of fluid from the body; a pumping plunger reciprocably movable in the body in a sliding fit in a manner to draw fluid into and expel fluid from the body via the aperture; said plunger being made of polyethylene foam and being dimensioned and so fitted in the body so that the plunger forms a relatively fluid tight resilient compression seal against the body.
Claim 4
Dependent Claim
86 words
A syringe comprising, in combination, a syringe body having an aperture at an end thereof for entry of fluid into and exit of fluid from the body; a pumping plunger reciprocably movable in the body in a sliding fit in a manner to draw fluid into and expel fluid from the body via the aperture; said plunger being made of polyethylene foam and being dimensioned and so fitted in the body so that the plunger forms a relatively fluid tight resilient compression seal against the body.
Claim 5
Dependent Claim
86 words
A syringe comprising, in combination, a syringe body having an aperture at an end thereof for entry of fluid into and exit of fluid from the body; a pumping plunger reciprocably movable in the body in a sliding fit in a manner to draw fluid into and expel fluid from the body via the aperture; said plunger being made of polyurethane foam and being dimensioned and so fitted in the body so that the plunger forms a relatively fluid tight resilient compression seal against the body.
Claim 6
Dependent Claim
86 words
A syringe comprising, in combination, a syringe body having an aperture at an end thereof for entry of fluid into and exit of fluid from the body; a pumping plunger reciprocably movable in the body in a sliding fit in a manner to draw fluid into and expel fluid from the body via the aperture; said plunger being made of polyurethane foam and being dimensioned and so fitted in the body so that the plunger forms a relatively fluid tight resilient compression seal against the body.
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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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |