US3882601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interstice device for denture double impressions
Assignee: A KETTENBACH Firma
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Filing: 1973-07-30
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Granted: 1975-05-13
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Expires: 1993-07-30
Abstract
Abstract A device for providing an interstice above a primary impression material on a dentist''s impression tray prior to application of a secondary impression material in the taking of denture double impressions wherein a laminar or strip-shaped sheet member made of a plastic resilient material is placed over the primary impression material between the primary impression and the secondary impression.
Inventors
- 👤 Ulrich W K Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
A; A61; A61C; A61C9/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
A method of taking dental double impressions comprising the steps of filling a dental impression tray with a primary impression material and forming said primary impression material as a mass defining an impression surface against which teeth may be pressed, covering said primary impression material by placing over said impression surface a laminar sheet of resilient strip material, forming primary dental impressions in said primary impression material by pressing teeth against said resilient strip material so that impressions are formed thereby in said primary impression material, removing said sheet material from said primary imPression material, recovering said primary impression material by placing secondary impression material thereover, and forming secondary dental impressions by pressing teeth against said secondary impression material.
Claim 2
Independent Claim
119 words
A method of taking dental double impressions comprising the steps of filling a dental impression tray with a primary impression material and forming said primary impression material as a mass defining an impression surface against which teeth may be pressed, covering said primary impression material by placing over said impression surface a laminar sheet of resilient strip material, forming primary dental impressions in said primary impression material by pressing teeth against said resilient strip material so that impressions are formed thereby in said primary impression material, removing said sheet material from said primary imPression material, recovering said primary impression material by placing secondary impression material thereover, and forming secondary dental impressions by pressing teeth against said secondary impression material.
Claim 3
Independent Claim
145 words
A device for taking dental double impressions comprising in combination, a dental impression tray, a primary impression material placed upon said tray and formed thereon as a mass of material adapted to have a dental impression made therein by having teeth pressed thereinto, said mass defining an impression surface thereof against which said teeth may be pressed, a laminar sheet of resilient strip material arranged over said primary impression material to cover said impression surface, and secondary impression material adapted to have a secondary impression of said teeth formed therein, said secondary impression material adapted to be placed over said impression surface of said primary impression material after a primary impression of said teeth has been made in said primary impression material by pressing said teeth against said resilient sheet material and after said sheet material has been removed from over said primary impression material.
Claim 4
Independent Claim
145 words
A device for taking dental double impressions comprising in combination, a dental impression tray, a primary impression material placed upon said tray and formed thereon as a mass of material adapted to have a dental impression made therein by having teeth pressed thereinto, said mass defining an impression surface thereof against which said teeth may be pressed, a laminar sheet of resilient strip material arranged over said primary impression material to cover said impression surface, and secondary impression material adapted to have a secondary impression of said teeth formed therein, said secondary impression material adapted to be placed over said impression surface of said primary impression material after a primary impression of said teeth has been made in said primary impression material by pressing said teeth against said resilient sheet material and after said sheet material has been removed from over said primary impression material.
Claim 5
Dependent Claim
25 words
A device according to claim 2 wherein said resilient strip material consists of a spacer hood adapted to be stretched over said primary impression material.
Claim 6
Dependent Claim
18 words
A device according to claim 3 wherein said spacer hood is provided with a reinforced resilient peripheral bead.
Claim 7
Dependent Claim
53 words
A device according to claim 4 wherein said spacer hood is provided with a resilient peripheral edge portion having an opening therethrough, said dental impression tray including a hand hold, said opening being adapted to have inserted therethrough said hand hold to prevent said spacer hood from becoming disengaged from said impression tray.
Claim 8
Dependent Claim
15 words
A device according to claim 5 wherein said spacer hood is of a square configuration.
Claim 9
Dependent Claim
15 words
A device according to claim 5 wherein said spacer hood is of a circular configuration.
Claim 10
Dependent Claim
15 words
A device aaccording to claim 5 wherein said spacer hood is of a rectangular configuration.
References Cited (Backward Citations)
US3390458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |