Patent US2591966A successfully refreshed from Google Patents.
US2591966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive shaft means for colloid mills
Assignee: Individual
•
Filing: 1948-07-31
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Granted: 1952-04-08
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Expires: 1968-07-31
Abstract
No abstract record available.
Inventors
- 👤 George H Rider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:34
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1980589A
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US993570A
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US938923A
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US1241100A
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US1593153A
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US1718184A
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US1851071A
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US2148608A
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US2231421A
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US2220751A
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US2462192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |