US3064816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the preparation, maintenance and feeding of slurries
Assignee: Individual
•
Filing: 1957-02-27
•
Granted: 1962-11-20
•
Expires: 1977-02-27
Abstract
No abstract record available.
Inventors
- 👤 David E Griswold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2025570A
Cited
US2455130A
Cited
US2631969A
Cited
US2649771A
Cited
US2653623A
Cited
US2710016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |