Patent US3380211A successfully refreshed from Google Patents.
US3380211A
Expired / Lapsed
US
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Shapes and method for lining a rotary kiln
Assignee: Harbison Walker Refractories Co
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Filing: 1965-06-11
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Granted: 1968-04-30
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 Snellman Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:28
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA522134A
Cited
US1629668A
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US1612412A
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US2187669A
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GB554473A
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US2982237A
Cited
GB927813A
Cited
FR1345481A
Cited
US3170420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |