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Patent US2687290A successfully refreshed from Google Patents.
US2687290A
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Treatment of recovered cement kiln dust
Assignee: Permanente Cement Co
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Filing: 1950-01-04
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Granted: 1954-08-24
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Expires: 1970-01-04
Abstract
No abstract record available.
Inventors
- 👤 John M Garoutte
- 👤 Peter S Hass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:09
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/16; C04B18/162; C04B7/00; C04B7/36; C04B7/43; C04B7/436; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US292329A
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US1741544A
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US1865554A
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US2073105A
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US2164950A
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US2477262A
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US2277663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |