Patent US5165890A successfully refreshed from Google Patents.
US5165890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dosing dental cartridge
Assignee: Centrix Aerospace LLC
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Filing: 1991-08-05
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Granted: 1992-11-24
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Expires: 2011-08-05
Abstract
Abstract A dental cartridge for dispensing a dental material having a body portion made of a material transparent to at least a portion of the visible light spectrum and opaque to the actinic light of the dental material contained therein. Also, a dental cartridge having a body portion formed from a toroidal segment and a coaxial nozzle attached thereto. The dental cartridges arae used in a dental syringe for application of the dental material to a patient. Several embodiments provide various discharge end configurations, including hemispherical, conical frustum, and flat. Additionally, dosing indicia are placed on the body portion of the dental cartridge, permitting the dentist to fill the dental cartridge with a predetermined volume of dental material. A specially configured piston having an appendage thereon is used in combination with the dental cartridge for extruding substantially all of the costly dental material therein.
Inventors
- 👤 John Discko, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:45
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/60; A61C5/66; A61C5/62; A61C2202/00; A61C2202/01
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A dental cartridge used in dispensing dental material comprising: a curved body portion, said body portion having an open end and a discharge end; a flange attached to the open end; and a curved nozzle having a bore attached to the discharge end, said nozzle being cut at an angle from a line perpendicular to the longitudinal axis of said nozzle, said body portion and said nozzle having a common curved longitudinal axis formed by a single radius.
Claim 2
Dependent Claim
78 words
A dental cartridge used in dispensing dental material comprising: a curved body portion, said body portion having an open end and a discharge end; a flange attached to the open end; and a curved nozzle having a bore attached to the discharge end, said nozzle being cut at an angle from a line perpendicular to the longitudinal axis of said nozzle, said body portion and said nozzle having a common curved longitudinal axis formed by a single radius.
Claim 3
Dependent Claim
87 words
A dental cartridge used in dispensing dental material comprising: a curved body portion having a first bore, said first bore having a constant first diameter, said body portion having an open end and a discharge end; a flange attached to the open end; and a curved nozzle having a second bore attached to the discharge end, said second bore having a constant second diameter smaller than said first diameter; said first bore and said second bore having a common curved longitudinal axis formed by a single radius.
Claim 4
Dependent Claim
87 words
A dental cartridge used in dispensing dental material comprising: a curved body portion having a first bore, said first bore having a constant first diameter, said body portion having an open end and a discharge end; a flange attached to the open end; and a curved nozzle having a second bore attached to the discharge end, said second bore having a constant second diameter smaller than said first diameter; said first bore and said second bore having a common curved longitudinal axis formed by a single radius.
Claim 5
Dependent Claim
17 words
A dental cartridge as in claim 2 wherein: said body portion has a circular lateral cross section.
Claim 6
Dependent Claim
40 words
A dental cartridge as in claim 3 further comprising: a piston having a shaped end complimenting the discharge end; and an appendage extending from the shaped end of said piston adapted to fit in the second bore of said nozzle;
Claim 7
Dependent Claim
27 words
A dental cartridge as in claim 4 wherein: said appendage has a length sufficient to extend out of said nozzle when said piston abuts said discharge end.
Claim 8
Dependent Claim
17 words
A dental cartridge as in claim 5 wherein: the interior surface of the discharge end is hemispherical.
Claim 9
Dependent Claim
20 words
A dental cartridge as in claim 5 wherein: the interior surface of the discharge end has a conical frustum shape.
Claim 10
Dependent Claim
17 words
A dental cartridge as in claim 5 wherein: the interior surface of the discharge end is flat.
Claim 11
Dependent Claim
16 words
A dental cartridge as in claim 2 wherein: said body portion and said nozzle are transparent.
Claim 12
Dependent Claim
23 words
A dental cartridge as in claim 9 further comprising: indicia means, on said body portion, for indicating the volume of material contained therein.
Claim 13
Dependent Claim
16 words
A dental cartridge as in claim 2 wherein: said body portion and said nozzle are opaque.
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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) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |