Patent US3068452A successfully refreshed from Google Patents.
US4444335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delivery of adjustable quantities of materials
Assignee: Merck and Co Inc
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Filing: 1981-09-14
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Granted: 1984-04-24
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Expires: 2001-09-14
Abstract
Abstract A delivery device and method making use of a plunger which can be controllable reciprocated within a housing to regulate the amount of material expelled from the housing. The plunger includes an adjustable stop collar which can be adjustably positioned, preferably by depressing the sides of the collar. In addition, a piston within the housing is sealably releasable from the plunger.
Inventors
- 👤 William E. Wood
- 👤 Roy A. Rosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31565; A61M5/3159; A61M5/31591; A61M3/00; A61M5/31533; A61M5/31545; A61M5/31548; A61M5/31555; A61M5/3156
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A delivery device comprising a housing having an outlet for material to be delivered therefrom: a plunger which can be reciprocated within said housing and means for controlling the extent of reciprocation of said plunger to regulate the amount of material expelled and delivered from said outlet wherein the controlling means is a stop means comprising an ajustably positioned collar surrounding said plunger and located externally of said housing wherein said collar includes compressible side portions to assist in fixing the adjustment position of said collar.
Claim 2
Dependent Claim
86 words
A delivery device comprising a housing having an outlet for material to be delivered therefrom: a plunger which can be reciprocated within said housing and means for controlling the extent of reciprocation of said plunger to regulate the amount of material expelled and delivered from said outlet wherein the controlling means is a stop means comprising an ajustably positioned collar surrounding said plunger and located externally of said housing wherein said collar includes compressible side portions to assist in fixing the adjustment position of said collar.
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |