US3011585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step stool
Assignee: Hamilton Cosco Inc
•
Filing: 1959-03-30
•
Granted: 1961-12-05
•
Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 Earl F Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:39
CPC Classifications
A; A47; A47C; A47C12/00; A47C12/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US946352A
Cited
US1399835A
Cited
US1698243A
Cited
GB356269A
Cited
US1975062A
Cited
US2023234A
Cited
US2790486A
Cited
US2877075A
Cited
US2873793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |