Patent US3642000A successfully refreshed from Google Patents.
US3642000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Applicator
Assignee: Individual
•
Filing: 1970-04-01
•
Granted: 1972-02-15
•
Expires: 1990-04-01
Abstract
Abstract A tube having stoppers at both ends and a free piston intermediate the ends. A medicament is disposed in the tube between one of the stoppers and the piston. The piston is adapted to be engaged by a stem inserted in the tube to expel the medicament from the tube.
Inventors
- 👤 Harry L Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:59
CPC Classifications
A; A61; A61M; A61M31/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A medicament applicator comprising: an elongated tube, a stopper in each end of said tube forming an airtight engagement therewith, a piston slidably mounted intermediate the ends of said tube, a medicament disposed between one stopper and said piston, and means forming a stem which engages said piston to slide said piston toward the end of said tube and effect the expulsion of said medicament, said stem comprising a sleeve having a longitudinal slit throughout its length, said slit sleeve being normally wrapped about the medicament-containing tube and being radially contractable for insertion into said medicamentcontaining tube to engage said piston.
Claim 2
Dependent Claim
101 words
A medicament applicator comprising: an elongated tube, a stopper in each end of said tube forming an airtight engagement therewith, a piston slidably mounted intermediate the ends of said tube, a medicament disposed between one stopper and said piston, and means forming a stem which engages said piston to slide said piston toward the end of said tube and effect the expulsion of said medicament, said stem comprising a sleeve having a longitudinal slit throughout its length, said slit sleeve being normally wrapped about the medicament-containing tube and being radially contractable for insertion into said medicamentcontaining tube to engage said piston.
Claim 3
Dependent Claim
23 words
A medicament Applicator according to claim 1 in which, said stem is shorter than said tube by approximately the thickness of said piston.
Claim 4
Dependent Claim
19 words
A medicament applicator according to claim 1 in which, said piston is easily slidable with respect to said tube.
Claim 5
Dependent Claim
35 words
A medicament applicator according to claim 1 in which, the end of said tube containing said medicament is turned in slightly to form a constriction of the diameter less than the diameter of said piston.
References Cited (Backward Citations)
US2195675A
Cited
US2185536A
Cited
US2630804A
Cited
US2518486A
Cited
US2572987A
Cited
US2616423A
Cited
US2712315A
Cited
FR1178160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |