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US2431933A
Expired / Lapsed
US
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Collapsible scaffold
Assignee: Individual
•
Filing: 1946-02-25
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Granted: 1947-12-02
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Expires: 1966-02-25
Abstract
No abstract record available.
Inventors
- 👤 Hartmann Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:43
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195488A
Cited
US1085383A
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US1200303A
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US1271557A
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US1943871A
Cited
US2294240A
Cited
US2379553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |