US4097993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthodontic arch wire
Assignee: "A"-COMPANY
•
Filing: 1977-04-04
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Granted: 1978-07-04
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Expires: 1997-04-04
Abstract
Abstract An orthodontic arch wire having a generally U-shaped configuration including a pair of legs that are generally symmetrical about a mid-point of the arch wire. Each of the legs is composed of a plurality of circular segments of varying radius wherein the point of transition between contiguous segments lies on a common line tangential to both segments.
Inventors
- 👤 Lawrence F. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:28
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12; A61C7/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
An arch wire adapted to engage the grooves in a set of tooth-mounted orthodontic brackets that have been applied at about the middle of the clinical crown of respective teeth, said arch wire being symmetrical about a mid-point and formed of a plurality of contiguous circular segments on each side of said mid-point, the length and curvature of each said segment being sufficient to engage the groove of at least one of said tooth-mounted orthodontic brackets, the point of transition between respective said contiguous segments being defined by a common line tangential to said contiguous segments.
Claim 2
Dependent Claim
96 words
An arch wire adapted to engage the grooves in a set of tooth-mounted orthodontic brackets that have been applied at about the middle of the clinical crown of respective teeth, said arch wire being symmetrical about a mid-point and formed of a plurality of contiguous circular segments on each side of said mid-point, the length and curvature of each said segment being sufficient to engage the groove of at least one of said tooth-mounted orthodontic brackets, the point of transition between respective said contiguous segments being defined by a common line tangential to said contiguous segments.
Claim 3
Dependent Claim
20 words
An arch wire in accordance with claim 1 wherein said plurality of segments comprises an inner and outer contiguous segment.
Claim 4
Dependent Claim
26 words
An arch wire in accordance with claim 2 wherein the radius of curvature of said inner and outer segments is in a ratio of about 1:4.
Claim 5
Dependent Claim
25 words
An arch wire in accordance with claim 2 wherein the length of said inner segment is defined by an angle in the range of 71°-72°.
Claim 6
Dependent Claim
21 words
An arch wire in accordance with claim 1 wherein said plurality of segments comprises an inner, intermediate and outer contiguous segment.
Claim 7
Dependent Claim
62 words
An arch wire in accordance with claim 5 wherein the length of said inner segment is defined by a first angle in the range of 40°-52° and the length of said intermediate segment is defined by a second angle in the range of 19°-31° with the proviso that the sum of said first and second angles is in the range of 70°-71°.
Claim 8
Dependent Claim
24 words
An arch wire in accordance with claim 1 wherein said plurality of segments comprises an inner, first intermediate, second intermediate and outer contiguous segment.
Claim 9
Dependent Claim
63 words
An arch wire in accordance with claim 7 wherein the length of said inner segment is defined by a first angle in the range of 33°-34°; the length of said first intermediate segment is defined by a second angle in the range of 19°-20°; and the length of said second intermediate segment is defined by a third angle in the range of 23°-24°.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |