US3520556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load-stabilizing trailer hitch
Assignee: Fisher Group Inc
•
Filing: 1968-01-17
•
Granted: 1970-07-14
•
Expires: 1988-01-17
Abstract
No abstract record available.
Inventors
- 👤 Richard E Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:36
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/24; B60D1/30; B60D1/34; B60D1/345
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3194584A
Cited
US2789834A
Cited
US2898124A
Cited
US3129957A
Cited
US3206224A
Cited
US3306628A
Cited
FR1446832A
Cited
US3347561A
Cited
US3403928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |