US3029153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating calcium carbonate
Assignee: Champion Papers Inc
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Filing: 1959-03-04
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Granted: 1962-04-10
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Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Hackley Kenneth Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:39
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C01; C01P; C01P2004/00; C01P2004/51; C01P2006/00; C01P2006/19; C01P2006/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A METHOD OF PREPARING AQUEOUS CALCIUM CARBONATE DISPERSIONS HAVING COATING PROPERTIES WHICH COMPRISES FORMING A SOLID POWDERY COMPOSITION OF CALCIUM CARBONATE, A DISPERSING AGENT SELECTED FROM THE GROUP CONSISTING OF (1) A MIXTURE OF AN ORGANIC CARBOXYLIC ACID HAVING IN ADDITION TO THE CARBOXYL GROUP AT LEAST ONE FUNCTIONAL GROUP ATTACHED TO A CARBON ATOM WHICH IS SELECTED FROM THE GROUP CONSISTING OF (A) THE CARBON ATOM TO WHICH ID ADJACENT TO THE CARBON ATOM TO WHICH THE ATOM WHICH ADJACENT TO THE CARBON ATOM WHICH THE CARBOXYL GROUP IS ATTACHED, AND A BASIC COMPOUND WHICH IS CAPABLE OF FORMING A SALT WITH SAID CARBOXYLIC ACID AND (2) SALTS OF SAID CARBOXYLIC ACID AND SAID BASIC COMPOUND AND SUFFICIENT WATER TO PRODUCE A MIXTURE OF NO LESS THAN ABOUT 65% BY WEIGHT TOTAL SOLIDS, AND MECHANICALLY WORKING THE COMPOSITION UNTIL THE SAID MIXTURE PASSES FROM A SOLID POWDERY PHASE TO A FLUID PHASE HAVING A VISCOSITY OF NOT IN EXCESS OF ABOUT 1 POISE AS MEASURED AT 65% TOTAL SOLIDS USING A HERCULES HI-SHEAR VISCOMETER AT ROOM TEMPERATURE AT 4540 SECONDS-1.
Claim 2
Independent Claim
181 words
A METHOD OF PREPARING AQUEOUS CALCIUM CARBONATE DISPERSIONS HAVING COATING PROPERTIES WHICH COMPRISES FORMING A SOLID POWDERY COMPOSITION OF CALCIUM CARBONATE, A DISPERSING AGENT SELECTED FROM THE GROUP CONSISTING OF (1) A MIXTURE OF AN ORGANIC CARBOXYLIC ACID HAVING IN ADDITION TO THE CARBOXYL GROUP AT LEAST ONE FUNCTIONAL GROUP ATTACHED TO A CARBON ATOM WHICH IS SELECTED FROM THE GROUP CONSISTING OF (A) THE CARBON ATOM TO WHICH ID ADJACENT TO THE CARBON ATOM TO WHICH THE ATOM WHICH ADJACENT TO THE CARBON ATOM WHICH THE CARBOXYL GROUP IS ATTACHED, AND A BASIC COMPOUND WHICH IS CAPABLE OF FORMING A SALT WITH SAID CARBOXYLIC ACID AND (2) SALTS OF SAID CARBOXYLIC ACID AND SAID BASIC COMPOUND AND SUFFICIENT WATER TO PRODUCE A MIXTURE OF NO LESS THAN ABOUT 65% BY WEIGHT TOTAL SOLIDS, AND MECHANICALLY WORKING THE COMPOSITION UNTIL THE SAID MIXTURE PASSES FROM A SOLID POWDERY PHASE TO A FLUID PHASE HAVING A VISCOSITY OF NOT IN EXCESS OF ABOUT 1 POISE AS MEASURED AT 65% TOTAL SOLIDS USING A HERCULES HI-SHEAR VISCOMETER AT ROOM TEMPERATURE AT 4540 SECONDS-1.
References Cited (Backward Citations)
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US2233358A
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US2232164A
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US2346243A
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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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |