Patent US2432781A successfully refreshed from Google Patents.
US2432781A
Expired / Lapsed
US
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Ladder attachment
Assignee: Individual
•
Filing: 1946-02-27
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Granted: 1947-12-16
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Expires: 1966-02-27
Abstract
No abstract record available.
Inventors
- 👤 Cecil E Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:19
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/34; E06C1/345; E06C1/36; E06C7/00; E06C7/48; E06C7/488
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US66961A
Cited
US208852A
Cited
US715944A
Cited
US799782A
Cited
US1018043A
Cited
US1030905A
Cited
US1522292A
Cited
US1658191A
Cited
US1879244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |