Patent US3401922A successfully refreshed from Google Patents.
US3401922A
Expired / Lapsed
US
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Linear grate for shaft kilns
Assignee: Battelle Development Corp
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Filing: 1966-10-24
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Granted: 1968-09-17
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Expires: 1986-10-24
Abstract
No abstract record available.
Inventors
- 👤 Jr John B Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:08
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/21; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; F27B1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2148946A
Cited
US2451024A
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US2639215A
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US3003667A
Cited
US3027147A
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US3202405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |