US2804355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary step and supporting brackets for attachment to ladders
Assignee: Individual
•
Filing: 1955-05-27
•
Granted: 1957-08-27
•
Expires: 1975-05-27
Abstract
No abstract record available.
Inventors
- 👤 John J Bartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:32
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/16; E06C7/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1359680A
Cited
US1415699A
Cited
US1735003A
Cited
US1960863A
Cited
US1890763A
Cited
US2182475A
Cited
US2557270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |