US3532276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum screen for fertilizer
Assignee: Cargill Inc
•
Filing: 1968-04-23
•
Granted: 1970-10-06
•
Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 Donald A Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:40
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US344603A
Cited
US446319A
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US1177309A
Cited
GB228899A
Cited
US1575719A
Cited
FR732750A
Cited
GB459817A
Cited
US2389715A
Cited
US2713942A
Cited
US3409411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |