US2607400A
Expired / Lapsed
US
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Portable back supporting device
Assignee: RAYMOND L KUNS
•
Filing: 1949-11-25
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Granted: 1952-08-19
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 George E Witz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:11
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/14; A47C1/146; A47C7/00; A47C7/02; A47C7/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |