Patent US2449385A successfully refreshed from Google Patents.
US2449385A
Expired / Lapsed
US
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Dental chair unit
Assignee: Individual
•
Filing: 1945-09-17
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Granted: 1948-09-14
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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 12:03
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/02; A61G15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US336220A
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US375954A
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US464046A
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US715147A
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US963595A
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US1011725A
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US1155541A
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US1352409A
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US2087932A
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US2308812A
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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 |