US3005446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stoker mechanism having a pulsatory grate
Assignee: Bituminous Coal Research Inc
•
Filing: 1957-05-24
•
Granted: 1961-10-24
•
Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
- 👤 Paul O Kock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:32
CPC Classifications
F; F23; F23H; F23H9/00; F23H9/04; F23B; F23B1/00; F23B1/16; F23B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US220901A
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US1840117A
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US786123A
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US1219256A
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US1886064A
Cited
GB352358A
Cited
US2086760A
Cited
FR775771A
Cited
US2116322A
Cited
US2387383A
Cited
US2763220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |