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US3402918A
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Discharge valve for rotating drum material treater
Assignee: Columbian Carbon Co
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Filing: 1966-12-20
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Granted: 1968-09-24
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Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Louis R Soulier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:59
CPC Classifications
B; B01; B01F; B01F29/00; B01F29/40; F; F26; F26B; F26B11/00; F26B11/02; F26B11/026
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) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |