US2755981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof ladder
Assignee: Individual
•
Filing: 1952-10-01
•
Granted: 1956-07-24
•
Expires: 1972-10-01
Abstract
No abstract record available.
Inventors
- 👤 Omer H Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:01
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; E06C7/082; E06C7/083; E06C1/00; E06C1/02; E06C1/04; E06C1/08; E06C1/10; E06C1/34; E06C1/345; E06C7/084; E06C7/48; E06C7/488; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/345; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7091; Y10T403/71; Y10T403/7129
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US267031A
Cited
US829527A
Cited
US878695A
Cited
US988808A
Cited
US1044889A
Cited
US1088128A
Cited
GB182345A
Cited
US2007496A
Cited
US2341510A
Cited
US2623794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |