US3654703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental impression tray
Assignee: Individual
•
Filing: 1970-01-27
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Granted: 1972-04-11
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Expires: 1990-01-27
Abstract
Abstract This invention is a dental impression device for holding dental impression compound. It is a dental tray. More particularly, this invention is a dental impression tray formed of a pliable polymeric plastic material, with a relatively thick base portion and thinly tapering sidewalls; the tray being easily modified by cutting and rejoining to provide a proper fit.
Inventors
- 👤 Harold L Mcadoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
Dental impression means for holding dental impression compound until set, comprising a dental tray formed of a generally U-shaped trough in a pliable polymeric plastic material, said tray trough having a relatively thick base portion and sidewalls tapered to a relatively thin section on the crown portion thereof, said tray being easily cut and rejoined to provide in situ fit of said tray, and said polymeric plastic material of a nature to readily adhere to numerous impression compounds utilized in said dental tray to assure precise and accurate impressions.
Claim 2
Dependent Claim
89 words
Dental impression means for holding dental impression compound until set, comprising a dental tray formed of a generally U-shaped trough in a pliable polymeric plastic material, said tray trough having a relatively thick base portion and sidewalls tapered to a relatively thin section on the crown portion thereof, said tray being easily cut and rejoined to provide in situ fit of said tray, and said polymeric plastic material of a nature to readily adhere to numerous impression compounds utilized in said dental tray to assure precise and accurate impressions.
Claim 3
Dependent Claim
22 words
A dental impression means as described in claim 1, wherein: a. said tray is formed of a thermosetting vinyl copolymeric plastic material.
Claim 4
Dependent Claim
96 words
A dental impression means as described in claim 1, wherein: a. said tray is formed of ethylene, vinyl acetate copolymer material having said base portion thicker than said sidewalls and said sidewalls tapering to a smaller cross-section on the edge portion thereof, said sidewalls providing a good seal with said tray and the mouth of the patient and said tray adjustable in size and somewhat in form by means of cutting said sidewalls, removing a section if necessary, rejoining same with staples, and by means of cutting a portion from said edge portion of said sidewalls.
References Cited (Backward Citations)
US3460252A
Cited
US3473225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |