Patent US4861267A successfully refreshed from Google Patents.
US4861267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slitted metal foil for forming a dental coping and method
Assignee: Individual
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Filing: 1987-09-08
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Granted: 1989-08-29
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Expires: 2007-09-08
Abstract
Abstract A slitted metal foil and method for forming a dental coping comprised of a composite body formed from at least two layers of precious metal with at least one or more slits extending from the perimeter to a location at or relatively close to the center of the foil to form slitted ends adapted to be overlaid to form a coping having a conical or frusto-conical shape.
Inventors
- 👤 Itzhak Shoher
- 👤 Aharon E. Whiteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:36
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C5/00; A61C5/70; A61C5/77
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A metal foil having a composite body formed from at least two layers of precious metal with at least one layer composed of a low fusing temperature gold based metal composition of up to 100% gold and another layer composed of a relatively high fusing temperature metal and including at least one slit extending from the perimeter of the foil to a location at or relatively close to the center of the foil to form slitted ends adapted to be overlaid in an arrangement for forming a coping having a substantially conical or frusto-conical shape.
Claim 2
Dependent Claim
95 words
A metal foil having a composite body formed from at least two layers of precious metal with at least one layer composed of a low fusing temperature gold based metal composition of up to 100% gold and another layer composed of a relatively high fusing temperature metal and including at least one slit extending from the perimeter of the foil to a location at or relatively close to the center of the foil to form slitted ends adapted to be overlaid in an arrangement for forming a coping having a substantially conical or frusto-conical shape.
Claim 3
Dependent Claim
37 words
A metal foil as defined in claim 1 wherein said metal foil is composed of at least three layers with each high fusing temperature metal layer having a low fusing temperature metal layer on each side thereof.
Claim 4
Dependent Claim
24 words
A metal foil as defined in claim 2 having only one slit which extends from the perimeter of the foil to the foil center.
Claim 5
Dependent Claim
25 words
A metal foil, as defined in claim 1, wherein said foil has multiple slits which form leaves adapted to be interleaved in an overlapping arrangement.
Claim 6
Dependent Claim
41 words
A metal foil, as defined in claim 4, wherein said multiple slits extend to a location near the center of the foil so as to leave an unslitted area adapted to be mounted on the occlusal surface of a prepared tooth.
Claim 7
Independent Claim
73 words
A method of forming a dental coping from a metal foil composed of at least two metal layers for use in a dental restoration comprising: making at least one slit in the foil extending from the perimeter of the foil to a location at or near the center of the foil for forming slitted ends and overlapping the slitted ends of the foil to form a coping with a conical or frusto-conical shape.
Claim 8
Independent Claim
73 words
A method of forming a dental coping from a metal foil composed of at least two metal layers for use in a dental restoration comprising: making at least one slit in the foil extending from the perimeter of the foil to a location at or near the center of the foil for forming slitted ends and overlapping the slitted ends of the foil to form a coping with a conical or frusto-conical shape.
Claim 9
Dependent Claim
37 words
A method as defined in claim 6 wherein the foil has only one slit with the slitted ends pulled in opposite directions relative to one another so that the foil curls around in a coil like pattern.
Claim 10
Dependent Claim
15 words
A method as defined in claim 6 wherein said metal foil is circular in shape.
Claim 11
Dependent Claim
15 words
A method as defined in claim 6 wherein said metal foil is rectangular in shape.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |