Patent US2904039A successfully refreshed from Google Patents.
US2904039A
Expired / Lapsed
US
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Back-supporting and stretching apparatus
Assignee: Individual
•
Filing: 1953-10-05
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Granted: 1959-09-15
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Expires: 1973-10-05
Abstract
No abstract record available.
Inventors
- 👤 Weissenberg Frances
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:02
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/05; A61G7/065; A61G7/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US111494A
Cited
FR608887A
Cited
US1960156A
Cited
US2243013A
Cited
US2385998A
Cited
US2427053A
Cited
US2553969A
Cited
US2570177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |