Patent US2746170A successfully refreshed from Google Patents.
US2746170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary dryer
Assignee: Proctor and Schwartz Inc
•
Filing: 1953-12-22
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Granted: 1956-05-22
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Expires: 1973-12-22
Abstract
No abstract record available.
Inventors
- 👤 Jack P Wilson
- 👤 Jr William R Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:20
CPC Classifications
F; F26; F26B; F26B11/00; F26B11/18; F26B11/181; F26B11/185; F26B11/187
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |