US3638313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extra oral dental retractor and bite opener
Assignee: Individual
•
Filing: 1970-07-14
•
Granted: 1972-02-01
•
Expires: 1990-07-14
Abstract
Abstract An extra oral dental retractor and bite opener having a U-shaped outer arch wire for coupling to a wearer''s neckband and the Ushaped inner arch wire coupled in the center portion thereof to the center portion of the U-shaped outer arch wire; a flat bite plate coupled to the center portion of one or both U-shaped arch wires and extending rearwardly therefrom for separating the upper and lower front teeth of the wearer; an elastic band coupled across the inner U-shaped arch wire for resting on the front teeth of the wearer and having a center portion pivotally attached by a wire to the front portion of the bite plate for limiting the travel of the elastic band.
Inventors
- 👤 Alberto J Cervera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:40
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
An extra oral dental retractor and bite opener comprising: a U-shaped outer arch wire for coupling to a wearer''s neckband; a U-shaped inner arch wire coupled in a center portion thereof to a center portion of said outer arch wire; a flat bite plate coupled to the center portion of one of said arch wires and extending rearwardly therefrom for separating a wearer''s upper and lower front teeth; and an elastic tooth band coupled across said inner U-shaped arch wire for exerting pressure on the front teeth of a wearer.
Claim 2
Dependent Claim
90 words
An extra oral dental retractor and bite opener comprising: a U-shaped outer arch wire for coupling to a wearer''s neckband; a U-shaped inner arch wire coupled in a center portion thereof to a center portion of said outer arch wire; a flat bite plate coupled to the center portion of one of said arch wires and extending rearwardly therefrom for separating a wearer''s upper and lower front teeth; and an elastic tooth band coupled across said inner U-shaped arch wire for exerting pressure on the front teeth of a wearer.
Claim 3
Dependent Claim
35 words
The extra oral dental retractor and bite opener of claim 1 and further including: first and second hooks carried by said inner arch wire, said elastic band being stitched between said first and second hooks.
Claim 4
Dependent Claim
31 words
The extra oral dental retractor and bite opener of claim 1 wherein: said elastic band is coupled at a center portion thereof to said bite plate for limiting the travel thereof.
Claim 5
Dependent Claim
34 words
The extra oral dental retractor and bite opener of claim 1 and further including: a pivotal coupling means, said pivotal coupling means coupling a center portion of said elastic band to said bite plate.
Claim 6
Dependent Claim
43 words
The extra oral dental retractor and bite opener of claim 4 wherein: said pivotal coupling means comprises a wire looped around said elastic band at one end thereof and looped through first and second apertures in said bite plate at another end thereof.
References Cited (Backward Citations)
US2880509A
Cited
US2983046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |