Patent US3729227A successfully refreshed from Google Patents.
US3729227A
Expired / Lapsed
US
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Dental chair
Assignee: Individual
•
Filing: 1971-06-11
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Granted: 1973-04-24
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Expires: 1991-06-11
Abstract
Abstract A dental chair comprising a plate-shaped back, both side parts of which corresponding to the portions below both shoulders of the patient are curved inwards, so that both upper portions of his arms and elbows may be supported in comfort by the said inwardly curved portions on both sides of the back.
Inventors
- 👤 S Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:08
CPC Classifications
A; A61; A61G; A61G15/00; A61G2200/00; A61G2200/50; A61G2200/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A dental chair comprising a generally horizontal seat portion and a back portion pivotally attached to the seat portion for up and down swinging motion, said back portion being generally plate-shaped and including a head rest projecting above the center thereof, the width of said back portion at the top corresponding to the width of the shoulders and upper arms of a patient and diverging outwardly and dowardly toward a location corresponding to the elbows of a patient and thereafter converging downwardly and inwardly to support the arms and elbows of a patient when in repose, the upper margins and both side margins of the plate-shaped back portion being curved inwardly in cross-section to position the arms and elbows of a patient in normal folded positions with respect to the remainder of the patient''s body while not obstructing the patient''s movements when entering or leaving the chair.
Claim 2
Dependent Claim
147 words
A dental chair comprising a generally horizontal seat portion and a back portion pivotally attached to the seat portion for up and down swinging motion, said back portion being generally plate-shaped and including a head rest projecting above the center thereof, the width of said back portion at the top corresponding to the width of the shoulders and upper arms of a patient and diverging outwardly and dowardly toward a location corresponding to the elbows of a patient and thereafter converging downwardly and inwardly to support the arms and elbows of a patient when in repose, the upper margins and both side margins of the plate-shaped back portion being curved inwardly in cross-section to position the arms and elbows of a patient in normal folded positions with respect to the remainder of the patient''s body while not obstructing the patient''s movements when entering or leaving the chair.
References Cited (Backward Citations)
US3115366A
Cited
US3172699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |