US3126253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of finely
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
•
Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:39
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/18; C01F11/182; C01F11/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS FOR THE MANUFACTURING OF FINELY DIVIDED CALCIUM CARBONATE BY REACTING AN AQUEOUS SUSPENSION OF CALCIUM HYDROXIDE WITH A GAS CONTAINING CARBON DIOXIDE AT A TEMPERATURE BETWEEN ABOUT 0 AND ABOUT 50*C., THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION IN THE PRESENCE OF A SALT OF NITRILOTRIACETIC ACID SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF THE SAID ACID.
Claim 2
Dependent Claim
68 words
IN A PROCESS FOR THE MANUFACTURING OF FINELY DIVIDED CALCIUM CARBONATE BY REACTING AN AQUEOUS SUSPENSION OF CALCIUM HYDROXIDE WITH A GAS CONTAINING CARBON DIOXIDE AT A TEMPERATURE BETWEEN ABOUT 0 AND ABOUT 50*C., THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION IN THE PRESENCE OF A SALT OF NITRILOTRIACETIC ACID SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF THE SAID ACID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |