Patent US3540633A successfully refreshed from Google Patents.
US3540633A
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US
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Apparatus for discharging particulate material
Assignee: Individual
•
Filing: 1968-01-11
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Granted: 1970-11-17
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Expires: 1988-01-11
Abstract
No abstract record available.
Inventors
- 👤 Hans A Eckhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:05
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/04; B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0025; B01J8/18; B01J8/24; B01J8/42; B65; B65D; B65D88/00; B65D88/54; B65D88/72; B65G; B65G53/00; B65G53/34; B65G53/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |