US2641453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pin mixer
Assignee: National Gypsum Co
•
Filing: 1951-04-21
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Granted: 1953-06-09
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Expires: 1971-04-21
Abstract
No abstract record available.
Inventors
- 👤 Robert R Teale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/27; B01F27/271; B28; B28C; B28C5/00; B28C5/08; B28C5/0881; B01F25/00; B01F2025/91; B01F2025/912; B01F27/2711; B01F27/80
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |