US2831637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for pulverizing mill
Assignee: Combustion Engineering Inc
•
Filing: 1953-12-01
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Granted: 1958-04-22
•
Expires: 1973-12-01
Abstract
No abstract record available.
Inventors
- 👤 Harvey C Mittendorf
- 👤 Konrad S Svendsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:53
CPC Classifications
B; B02; B02C; B02C21/00; F; F23; F23K; F23K1/00; F23K2201/00; F23K2201/10; F23K2201/1006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20156E
Cited
US2264511A
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US1522877A
Cited
US1905658A
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US2412739A
Cited
US2530117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |