US2803388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder hook
Assignee: Individual
•
Filing: 1955-08-16
•
Granted: 1957-08-20
•
Expires: 1975-08-16
Abstract
No abstract record available.
Inventors
- 👤 Willard A Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:48
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US783259A
Cited
US893083A
Cited
US1285918A
Cited
US1393048A
Cited
US1590064A
Cited
US2319893A
Cited
US2680554A
Cited
US2718378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |