US2449385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental chair unit
Assignee: Individual
•
Filing: 1945-09-17
•
Granted: 1948-09-14
•
Expires: 1965-09-17
Abstract
No abstract record available.
Inventors
- 👤 Carroll W Johnson
- 👤 John T Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:31
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/02; A61G15/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US336220A
Cited
US375954A
Cited
US464046A
Cited
US715147A
Cited
US963595A
Cited
US1011725A
Cited
US1155541A
Cited
US1352409A
Cited
US2087932A
Cited
US2308812A
Cited
US2311566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |