US3133824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of finely dispersed calcium carbonate
Assignee: Bayer AG
•
Filing: 1960-10-05
•
Granted: 1964-05-19
•
Expires: 1980-10-05
Abstract
No abstract record available.
Inventors
- 👤 Podschus Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:26
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A PROCESS FOR PREPARING FINELY DISPERSED SILICIC ACID-CONTAINING CALCIUM CARBONATE BY REACTING AQUEOUS SUSPENSIONS OF CALCIUM HYDROXIDE WITH GASES CONTAINING CARBON DIOXIDE, THE STEP WHICH COMPRISES EFFECTING THE REACTION OF CARBON DIOXIDE WITH CALCIUM HYDROXIDE SUSPENSIONS CONTAINING ABOUT 0.1 TO ABOT 20% BY WEIGHT OF ACTIVE SILICIC ACID, CALCULATED UPON THE QUANTITY OF CALCIUM CARBONATE TO PRODUCE A FINELY DISPERSED SILICIC ACIDCONTAINING CALCIUM CARBONATE.
Claim 2
Dependent Claim
65 words
IN A PROCESS FOR PREPARING FINELY DISPERSED SILICIC ACID-CONTAINING CALCIUM CARBONATE BY REACTING AQUEOUS SUSPENSIONS OF CALCIUM HYDROXIDE WITH GASES CONTAINING CARBON DIOXIDE, THE STEP WHICH COMPRISES EFFECTING THE REACTION OF CARBON DIOXIDE WITH CALCIUM HYDROXIDE SUSPENSIONS CONTAINING ABOUT 0.1 TO ABOT 20% BY WEIGHT OF ACTIVE SILICIC ACID, CALCULATED UPON THE QUANTITY OF CALCIUM CARBONATE TO PRODUCE A FINELY DISPERSED SILICIC ACIDCONTAINING CALCIUM 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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |