US3456906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling and conditioning unit for granular material
Assignee: National Engineering Co
•
Filing: 1966-05-05
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Granted: 1969-07-22
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Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Elbert C Troy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:05
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; B22C5/0409; B22C5/044; B01; B01F; B01F27/00; B01F27/80; B01F27/82; B01F27/95; B01F27/952; B22C5/0422; B01F27/23; B01F27/232; B01F27/2324
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |