US3207555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head and back rest component for dental chairs
Assignee: Individual
•
Filing: 1963-04-08
•
Granted: 1965-09-21
•
Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:59
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/10; A61G15/12; A61G15/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A DENTAL CHAIR COMPONENT COMPRISING A BACK REST, A HEAD REST PIVOTALLY ATTACHED TO SAID BACK REST, AND A DRIVE SCREW THREADEDLY ENGAGEABLE WITH ONE OF SAID BACK REST AND HEAD REST AND BEING CONFINED IN THE OTHER OF SAID BACK REST AND HEAD REST TO RESTRICT AXIAL MOVEMENT OF THE DRIVE SCREW WHEREBY UPON ROTATION OF SAID SCREW SAID HEAD REST IS DRIVEN PIVOTALLY RELATIVE TO SAID BACK REST.
Claim 2
Dependent Claim
70 words
A DENTAL CHAIR COMPONENT COMPRISING A BACK REST, A HEAD REST PIVOTALLY ATTACHED TO SAID BACK REST, AND A DRIVE SCREW THREADEDLY ENGAGEABLE WITH ONE OF SAID BACK REST AND HEAD REST AND BEING CONFINED IN THE OTHER OF SAID BACK REST AND HEAD REST TO RESTRICT AXIAL MOVEMENT OF THE DRIVE SCREW WHEREBY UPON ROTATION OF SAID SCREW SAID HEAD REST IS DRIVEN PIVOTALLY RELATIVE TO SAID BACK REST.
References Cited (Backward Citations)
US2985228A
Cited
US3071412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |