US2277073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating granular materials
Assignee: Fiske Brick & Granule Co
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Filing: 1937-04-03
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Granted: 1942-03-24
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Expires: 1957-04-03
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Colbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/08; C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B3/08; C21B2400/00; C21B2400/02; C21B2400/022; C21B2400/026; C21B2400/034; C21B2400/05; C21B2400/066; C21B2400/068; C21B2400/074
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-03-23 | 1945-09-22 | 1946-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-23 | 1949-09-22 | 1950-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-23 | 1953-09-22 | 1954-03-24 | $7700.00 | Window Closed / Lapsed |