US3499564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoist and control mechanism for a hopper
Assignee: GRAND SPECIALTIES CO
•
Filing: 1967-09-18
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Granted: 1970-03-10
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Expires: 1987-09-18
Abstract
No abstract record available.
Inventors
- 👤 Fred P Hopfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:25
CPC Classifications
B; B66; B66B; B66B17/00; B66B17/14; B66B17/26; B65; B65G; B65G2812/00; B65G2812/06; B65G2812/0609; B65G2812/0654; B65G2812/0663; B65G2812/0672; B65G2812/0681; B65G2812/069
Claims Analysis
Total Claims: 0
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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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |