Patent US3604116A successfully refreshed from Google Patents.
US3604116A
Expired / Lapsed
US
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Dental impression wafer
Assignee: Individual
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Filing: 1970-01-08
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Granted: 1971-09-14
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Expires: 1990-01-08
Abstract
Abstract A wafer consisting of a plastic carrier foil thinner than 0.020 mm. and of high mechanical strength and a coating of impression wax on one or both faces of the foil can be compressed between teeth of a dentist''s patient under high bite pressure without disturbing the normal bite of any tooth in the patient''s mouth because of the elastic compressibility of the periodontal membranes. The impressions obtained in the wafer thus are undistorted.
Inventors
- 👤 Harry Shpuntoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:54
CPC Classifications
A; A61; A61C; A61C9/00; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
A dental impression wafer essentially consisting of a. a carrier of pliable sheet material having a thickness of less than 0.020 mm., and b. a coating of a plastically deformable impression material on at least one of the two faces of said carrier. 1. the mechanical strength of said sheet material being substantially greater than the strength of said coating on said one face, 2. said impression material being shape retaining at a temperature of 37* C., and 3. the thickness of the coating on said one face being greater than the thickness of said carrier.
Claim 2
Dependent Claim
96 words
A dental impression wafer essentially consisting of a. a carrier of pliable sheet material having a thickness of less than 0.020 mm., and b. a coating of a plastically deformable impression material on at least one of the two faces of said carrier. 1. the mechanical strength of said sheet material being substantially greater than the strength of said coating on said one face, 2. said impression material being shape retaining at a temperature of 37* C., and 3. the thickness of the coating on said one face being greater than the thickness of said carrier.
Claim 3
Dependent Claim
13 words
said impression material being shape retaining at a temperature of 37* C., and
Claim 4
Dependent Claim
13 words
said impression material being shape retaining at a temperature of 37* C., and
Claim 5
Dependent Claim
18 words
A wafer as set forth in claim 1, wherein said sheet material essentially consists of synthetic resin composition.
Claim 6
Dependent Claim
20 words
A wafer as set forth in claim 2, wherein said resin composition is a polycondensate of ethyleneglycol and terephthalic acid.
Claim 7
Dependent Claim
17 words
the thickness of the coating on said one face being greater than the thickness of said carrier.
Claim 8
Dependent Claim
17 words
the thickness of the coating on said one face being greater than the thickness of said carrier.
Claim 9
Dependent Claim
16 words
A wafer as set forth in claim 1, wherein said sheet material is birefringent when stressed.
Claim 10
Dependent Claim
25 words
A wafer as set forth in claim 1, further comprising a reflective coating on said sheet material, said impression material being substantially impervious to light.
Claim 11
Dependent Claim
36 words
A wafer as set forth in claim 1, wherein a coating of said impression material is on both faces of said sheet material, the thickness of each coating being greater than the thickness of said carrier.
Claim 12
Dependent Claim
15 words
A wafer as set forth in claim 1, wherein said material is a Bite wax.
References Cited (Backward Citations)
US2633637A
Cited
US3046658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |