Patent US4243389A successfully refreshed from Google Patents.
US4243389A
Expired / Lapsed
US
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Dental dowel pin placement apparatus
Assignee: Individual
•
Filing: 1979-12-11
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Granted: 1981-01-06
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Expires: 1999-12-11
Abstract
Abstract A dowel pin holder having an elongate base horizontally positionable within a dental impression. A guide for installation of the base is temporarily positionable above the specific tooth impression and guides the inserted base into precise position above the tooth impression. A dowel pin holder is positionable along the elongate base as is a slidable indicator for the dowel pin holder.
Inventors
- 👤 Jeffrey W. Eisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:57
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
An apparatus for retaining a dowel pin in partial embedment within a settable jaw reproduction cast within a dental impression, said apparatus comprising, an elongate base for supported engagement adjacent its ends with the impression, a guide for base installation carried by said base and positionable above a tooth impression, a dowel pin holder supported by and positionable along said base into alignment with the desired dowel pin location whereat the lower portion of the dowel pin will be subsequently embedded in the jaw reproduction, and indicator means positionable along said base to mark the desired location of said dowel pin holder when the latter is reinstalled on the base after impression and jaw reproduction vibration.
Claim 2
Independent Claim
116 words
An apparatus for retaining a dowel pin in partial embedment within a settable jaw reproduction cast within a dental impression, said apparatus comprising, an elongate base for supported engagement adjacent its ends with the impression, a guide for base installation carried by said base and positionable above a tooth impression, a dowel pin holder supported by and positionable along said base into alignment with the desired dowel pin location whereat the lower portion of the dowel pin will be subsequently embedded in the jaw reproduction, and indicator means positionable along said base to mark the desired location of said dowel pin holder when the latter is reinstalled on the base after impression and jaw reproduction vibration.
Claim 3
Dependent Claim
23 words
The apparatus claimed in claim 1 wherein said elongate base is adapted at its leading end for horizontal insertion into the dental impression.
Claim 4
Dependent Claim
19 words
The apparatus claimed in claim 1 wherein said guide is bifurcated for installation on and removal from said base.
Claim 5
Dependent Claim
16 words
The apparatus claimed in claim 3 additionally including a dowel pin locator carried by said guide.
Claim 6
Dependent Claim
37 words
The apparatus claimed in claim 1 wherein said dowel pin holder is expansible to receive different dowel pin diameters permitting the reception of different dowel pin sizes and alternatively a tapered dowel pin at different adjusted heights.
Claim 7
Dependent Claim
27 words
The apparatus claimed in claim 5 additionally including a stop positionable along the base to prevent base displacement during vibration of the impression and jaw reproduction therein.
References Cited (Backward Citations)
US2836849A
Cited
US3277576A
Cited
US3417471A
Cited
US3553839A
Cited
US3717933A
Cited
US3753291A
Cited
US4129281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |