US2908487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blending mill agitator and additive feed
Assignee: PATTERSON KELLEY CO
•
Filing: 1956-03-29
•
Granted: 1959-10-13
•
Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 John J Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:39
CPC Classifications
B; B01; B01F; B01F29/00; B01F29/20; B01F29/60; B01F29/64; B01F29/40; B01F29/401; B01F29/4011; B01F29/40118; B01F29/402; B01F29/4021; B01F29/403; B01F29/4036; B01F29/40363
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) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |