US3399466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand hopper
Assignee: Hartley Controls Corp
•
Filing: 1967-06-21
•
Granted: 1968-09-03
•
Expires: 1987-06-21
Abstract
No abstract record available.
Inventors
- 👤 Hartley Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:33
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/74; B65D88/744; B65G; B65G21/00; B65G21/20; B65G21/2045; B65G21/2063; B65G21/2072; B65G21/2081
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |