Patent US5409465A successfully refreshed from Google Patents.
US5409465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impression syringe
Assignee: Individual
•
Filing: 1994-02-07
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Granted: 1995-04-25
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Expires: 2014-02-07
Abstract
Abstract An improved syringe having a double walled barrel, a first tip communicating with the interior of the barrel, a plunger slideable within the barrel for delivering impression material through the first tip, and a second tip communicating with the space between the walls of the barrel for delivering a cleansing fluid about the impression material.
Inventors
- 👤 Michael S. Boggs
- 👤 William Lowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0026; A61C5/00; A61C5/60; A61C5/62; A61C5/64
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
A syringe comprising: a double-walled barrel having a space between the walls of said barrel, a first generally conical tip opening to the interior of said barrel, a plunger slideable within said interior of said barrel for delivering impression material for discharge through said first tip, a second generally conical tip communicating with said space between said walls of said barrel.
Claim 2
Dependent Claim
61 words
A syringe comprising: a double-walled barrel having a space between the walls of said barrel, a first generally conical tip opening to the interior of said barrel, a plunger slideable within said interior of said barrel for delivering impression material for discharge through said first tip, a second generally conical tip communicating with said space between said walls of said barrel.
Claim 3
Dependent Claim
18 words
The syringe of claim 1 wherein: said second tip is concentric with and spaced from said first tip.
Claim 4
Dependent Claim
21 words
The syringe of claim 1 wherein: said second tip delivers said fluid surrounding said impression material discharged through said first tip.
Claim 5
Dependent Claim
40 words
The syringe of claim 1 further comprising: a nipple projecting outwardly from the outer wall of said barrel dimensioned to frictionally receive a fluid supply hose and communicating with said space between said walls to deliver fluid into said space.
Claim 6
Dependent Claim
24 words
The syringe of claim 1 further comprising: a nut releasably securing said first tip to one end of the inner wall of said barrel.
Claim 7
Dependent Claim
23 words
The syringe of claim 1 further comprising: a fluid seal closing the end of said space between said walls opposite from said tips.
Claim 8
Dependent Claim
21 words
The syringe of claim 1 wherein: said first tip is mounted on one end of the inner wall of said barrel.
Claim 9
Dependent Claim
21 words
The syringe of claim 1 wherein: said second tip is mounted on one end of the outer wall of said barrel.
Claim 10
Dependent Claim
74 words
The syringe of claim 1 wherein: said double-walled barrel comprises a sleeve dimensional dimensioned to receive a conventional syringe and having sealing means forming a fluid seal between said sleeve and said conventional syringe and serving to provide a fluid passage between said sleeve and said conventional syringe, said first tip and said plunger being components of said conventional syringe and said second tip being mounted on said sleeve and encircling said first tip.
Claim 11
Dependent Claim
24 words
The device of claim 9 further comprising: fluid supply means connected to deliver fluid to said fluid passage for discharge through said second tip.
Claim 12
Dependent Claim
36 words
The syringe of claim 9 further comprising: a nipple projecting outwardly from said sleeve and dimensioned to frictionally receive a fluid supply hose and communicating with said fluid passage to deliver fluid into said fluid passage.
Claim 13
Dependent Claim
27 words
The syringe of claim 1 wherein: said plunger is operable to create a vacuum at said first tip to facilitate suctioning of material through said first tip.
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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) | 1998-04-24 | 1998-10-24 | 1999-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-24 | 2002-10-24 | 2003-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-24 | 2006-10-24 | 2007-04-25 | $7700.00 | Window Closed / Lapsed |