US2800337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for hand trucks
Assignee: Individual
•
Filing: 1954-06-02
•
Granted: 1957-07-23
•
Expires: 1974-06-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Avril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:07
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/10; B62B1/12; B62B1/008; B62B2203/00; B62B2203/05; B62B2203/70
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US217864A
Cited
US1090501A
Cited
GB185067A
Cited
US1712485A
Cited
US2432368A
Cited
US2589325A
Cited
US2598489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |