US3020972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination utility cart and extension ladder
Assignee: Individual
•
Filing: 1960-03-07
•
Granted: 1962-02-13
•
Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 John A Hockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:40
CPC Classifications
B; B62; B62B; B62B3/00; E; E06; E06C; E06C5/00; E06C5/02; E06C5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1837664A
Cited
US2398817A
Cited
US2536492A
Cited
US2707585A
Cited
US2630961A
Cited
US2794583A
Cited
US2980200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |