Patent US4016650A successfully refreshed from Google Patents.
US4016650A
Expired / Lapsed
US
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Impression tray for dental purposes
Assignee: Bayer AG
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Filing: 1975-10-31
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Granted: 1977-04-12
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Expires: 1995-10-31
Abstract
Abstract In order, when taking impressions of the upper jaw and lower jaw for dental purposes, to be able to introduce the upper-jaw tray and lower-jaw tray individually into and to remove them individually from the mouth of the patient, one of the trays is formed on the bite surface with depressions against which openings in the second tray come to rest, so that the impression compound is able to penetrate through the openings into the depressions.
Inventors
- 👤 Bernd W. Leusner
- 👤 Hans-Hermann Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:08
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
An impression tray for dental purposes which comprises a lower-jaw tray and an upper-jaw tray each having a shape adapted to the shape of the jaw, one of the jaw-trays being provided with a bite surface having depressions and the other jaw tray being provided with a bite surface having openings, the openings and depressions being situated in such locations that they are in register when the two jaw-trays meet.
Claim 2
Dependent Claim
70 words
An impression tray for dental purposes which comprises a lower-jaw tray and an upper-jaw tray each having a shape adapted to the shape of the jaw, one of the jaw-trays being provided with a bite surface having depressions and the other jaw tray being provided with a bite surface having openings, the openings and depressions being situated in such locations that they are in register when the two jaw-trays meet.
Claim 3
Dependent Claim
45 words
An impression tray as claimed in claim 1, further comprising a gap-equalising plate which is capable of being fixed to one of the two jaw plates and having either depressions or openings corresponding to those of the tray to which it is to be fixed.
Claim 4
Dependent Claim
22 words
An impression tray as claimed in claim 1 in which the depressions are in the form of intersecting grooves or punctiform depressions.
Claim 5
Dependent Claim
19 words
An impression tray as claimed in claim 1, in which the openings are in the form of elongated holes.
Claim 6
Dependent Claim
30 words
An impression tray as claimed in claim 2, in which the gap-equalising plate is fixed to the jaw-tray by means of studs which engage corresponding depressions in the jaw tray.
Claim 7
Dependent Claim
19 words
An impression tray as claimed in claim 3, in which the openings are in the form of elongated holes.
Claim 8
Dependent Claim
23 words
An impression tray as claimed in claim 2, in which the gap equalizing plate is fixed to the jaw-tray by means of adhesive.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |