Patent US3781994A successfully refreshed from Google Patents.
US3781994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for separating an area of operation or treatment in the oral cavity
Assignee: Individual
•
Filing: 1972-02-02
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Granted: 1974-01-01
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Expires: 1992-02-02
Abstract
Abstract A device for separating a larger or smaler area, i.e., teeth, of the oral cavity for dental treatment consisting of a dam of an elastic material intended to be applied over said area and to be fixed in its position by a streching means, whereby said dam is surrounded by and connected to a inflatable frame piece.
Inventors
- 👤 S Hesselgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:26
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/80; A61C5/82
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
A device for separating a region of the mouth during dental treatment comprising a dam formed of a sheet of elastic material having at least one hole to be slipped over the teeth and area of said mouth to be tReated, and a hollow frame integral with said sheet surrounding at least a portion of the periphery of said sheet, said frame being extendible to stretch said sheet to fix said sheet in position in said mouth.
Claim 2
Independent Claim
77 words
A device for separating a region of the mouth during dental treatment comprising a dam formed of a sheet of elastic material having at least one hole to be slipped over the teeth and area of said mouth to be tReated, and a hollow frame integral with said sheet surrounding at least a portion of the periphery of said sheet, said frame being extendible to stretch said sheet to fix said sheet in position in said mouth.
Claim 3
Dependent Claim
15 words
The device according to claim 1 wherein said frame is an inflatable hollow tubular member.
Claim 4
Dependent Claim
17 words
The device according to claim 1 wherein said sheet is removably attached around said inflatable tubular frame.
Claim 5
Dependent Claim
16 words
The device according to claim 1 wherein said frame forms a collecting pocket about said sheet.
Claim 6
Dependent Claim
23 words
The device according to claim 2 including conduit means communicating with the interior of said frame by which said frame may be inflated.
Claim 7
Dependent Claim
23 words
The device according to claim 4 including at least one nipple communicating with said pocket for connection with means to evacuate said pocket.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |