Patent US3022989A successfully refreshed from Google Patents.
US3022989A
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Hydraulic cement process
Assignee: Union Commerce Bank
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Filing: 1954-04-07
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Granted: 1962-02-27
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Expires: 1974-04-07
Abstract
No abstract record available.
Inventors
- 👤 Pyzel Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:56
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/43; C04B7/44; C04B7/45
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
THE PROCESS FOR THE MANUFACTURE OF HYDRAULIC CEMENT FROM CARBONATE-CONTAINING RAW FEED MATERIALS, WHICH COMPRISES MAINTAINING A FLUIDIZED MASS OF COARSE PARTICLES WHICH ARE INERT TO THE RAW FEED MATERIALS AT THE TEMPERATURES OF CALCINATION OF SAID RAW FEED MATERIALS, CHARGING INTO SAID FLUIDIZED MASS AT LEAST THE CARBONATE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |