Patent US4869666A successfully refreshed from Google Patents.
US4869666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthodontic arch wire
Assignee: Ormco Corp
•
Filing: 1988-10-14
•
Granted: 1989-09-26
•
Expires: 2008-10-14
Abstract
Abstract An orthodontic arch wire for use in imparting corrective forces to teeth comprising: an elongated central core made of a transparent or translucent material having a modulus of at least 3,000,000 pounds per square inch; an outer layer made of a substantially transparent or translucent material which is hydrolytically stable so as to resist staining or deterioration when placed in an oral cavity.
Inventors
- 👤 Mohd. F. Talass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:48
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12; A61C7/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
An orthodontic arch wire for use in imparting corrective forces to teeth comprising: an elongated central core made of a transparent or translucent material having a modulus of at least 3,000,000 pounds per square inch; an outer layer made of a substantially transparent or translucent material which is hydrolytically stable so as to resist staining or deterioration when placed in an oral cavity.
Claim 2
Dependent Claim
63 words
An orthodontic arch wire for use in imparting corrective forces to teeth comprising: an elongated central core made of a transparent or translucent material having a modulus of at least 3,000,000 pounds per square inch; an outer layer made of a substantially transparent or translucent material which is hydrolytically stable so as to resist staining or deterioration when placed in an oral cavity.
Claim 3
Dependent Claim
24 words
An orthodontic arch wire according to claim 1 wherein the elongated central core has a refractive index substantially the same as the outer layer.
Claim 4
Dependent Claim
28 words
An orthodontic arch wire according to claim 2 wherein said elongated core has a refractive index of 1.49, and said outer layer has a refractive index of 1.410.
Claim 5
Dependent Claim
16 words
An orthodontic arch wire according to claim 1 wherein said core is made of quartz glass.
Claim 6
Dependent Claim
20 words
An orthodontic arch wire according to claim 1 wherein said core has a diameter no greater than about 0.01 inches.
Claim 7
Dependent Claim
23 words
An orthodontic arch wire according to claim 1 wherein said outer layer has a thickness in the range of 0.004 to 0.012 inches.
Claim 8
Dependent Claim
18 words
An orthodontic arch wire according to claim 1 wherein said arch wire has a substantially circular cross-sectional configuration.
Claim 9
Dependent Claim
17 words
An orthodontic arch wire according to claim 1 wherein said arch wire has substantially rectangular cross-sectional configuration.
Claim 10
Dependent Claim
28 words
An orthodontic arch wire according to claim 1 further comprising a second outer layer around said first outer layer, said second outer layer providing improved resistance to abrasion.
Claim 11
Dependent Claim
20 words
An orthodontic arch wire according to claim 1 wherein said outer layer has a refractive index less than said core.
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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |