US3016974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step stool
Assignee: Hamilton Cosco Inc
•
Filing: 1959-03-30
•
Granted: 1962-01-16
•
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
2026-11-04 21:41
CPC Classifications
A; A47; A47C; A47C12/00; A47C12/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1671013A
Cited
GB445430A
Cited
US2257926A
Cited
US2433699A
Cited
US2438212A
Cited
FR1067743A
Cited
US2900011A
Cited
US2805703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |