US3554599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Longitudinally adjustable back-rest for dental chair and the like
Assignee: Sybron Transition Corp
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Filing: 1968-10-30
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Granted: 1971-01-12
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Expires: 1988-10-30
Abstract
Abstract A LONGITUDINALLY ADJUSTABLE BACK-REST FOR DENTAL CHAIRS AND THE LIKE HAVING A FIXED SECTION AND A TELESCOPING SECTION, THE TELESCOPING SECTION HAVING A PLURALITY OF SPACED TRANSVERSE SUPPORTING MEMBERS COVERED WITH UPHOLSTERY, THE SECTIONS MOVING TOGETHER AND APART AS THE SECTIONS ARE TELESCOPED TOGETHER AND APART RESPECTIVELY TO PERMIT INCREASING OR DECREASING THE LENGTH OF THE BACK-REST FOR ACCOMMODATING PATIENTS OF VARIOUS HEIGHTS.
Inventors
- 👤 Helmut Richard Pietschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:33
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/402; A61; A61G; A61G15/00; A61G15/02; A61G15/10; A61G15/12; A61G15/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |