US3738006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental impression material injecting syringe
Assignee: Individual
•
Filing: 1972-06-23
•
Granted: 1973-06-12
•
Expires: 1992-06-23
Abstract
Abstract A dental syringe for elastic impression material is provided which comprises a nozzle section and plunger section. The plunger section includes a mixing chamber adapted to receive the nozzle section. When the two sections are coupled, the impression material may be extruded through the nozzle.
Inventors
- 👤 O Lopez
- 👤 J Valdes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0026
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A dental impression material injecting syringe which comprises a tubular barrel, said barrel including a nozzle at one end and an enlarged annular flange at the other end, said barrel further including finger grasps intermediate said flange and nozzle; a tubular mixing chamber dimensioned to closely receive said annular flange; and a plunger mounted through the base of said chamber and positioned in alignment with said barrel when said flange is positioned in said mixing chamber, said plunger having a head dimensioned to closely fit within said barrel.
Claim 2
Dependent Claim
88 words
A dental impression material injecting syringe which comprises a tubular barrel, said barrel including a nozzle at one end and an enlarged annular flange at the other end, said barrel further including finger grasps intermediate said flange and nozzle; a tubular mixing chamber dimensioned to closely receive said annular flange; and a plunger mounted through the base of said chamber and positioned in alignment with said barrel when said flange is positioned in said mixing chamber, said plunger having a head dimensioned to closely fit within said barrel.
Claim 3
Dependent Claim
15 words
A tool according to claim 1 wherein said annular flange includes a disked out recess.
Claim 4
Dependent Claim
31 words
A tool according to claim 1 wherein said finger grasps are positioned to abut the rim of said mixing chamber when said annular flange is completely inserted within said mixing chamber.
Claim 5
Dependent Claim
11 words
A tool according to claim 1 which is constructed of plastic.
Claim 6
Dependent Claim
15 words
A tool according to claim 1 wherein said nozzle is disposed angularly to said barrel.
Claim 7
Dependent Claim
37 words
A tool according to claim 1 wherein the base of said mixing chamber includes a depression dimensioned to accomodate said plunger head whereby the base of said chamber is essentially flat when said plunger is completely extended.
References Cited (Backward Citations)
US2056173A
Cited
US2903794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |