US2541722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible frame
Assignee: Individual
•
Filing: 1945-10-22
•
Granted: 1951-02-13
•
Expires: 1965-10-22
Abstract
No abstract record available.
Inventors
- 👤 Marshal P Shackelford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:33
CPC Classifications
A; A47; A47B; A47B3/00; A47B3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US149569A
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US270031A
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US716393A
Cited
US875195A
Cited
US892422A
Cited
US1042020A
Cited
US1351013A
Cited
US1646175A
Cited
US1894176A
Cited
US2338789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |