Patent US2498005A successfully refreshed from Google Patents.
US2498005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of pigment comprising calcium carbonate
Assignee: Raffold Process Corp
•
Filing: 1946-10-31
•
Granted: 1950-02-21
•
Expires: 1966-10-31
Abstract
No abstract record available.
Inventors
- 👤 Harold R Rafton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:32
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C01; C01F; C01F11/00; C01F11/18; C01F11/185; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/19; C01P2006/60; C01P2006/80; C01P2006/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
IN THE TREATMENT OF A PIGMENT COMPRISING CALCIUM CARBONATE, THE METHOD OF MODIFYING SAID PIGMENT TO EFFECT AN IMPROVEMENT IN AT LEAST ONE OF THE PROPERTIES OF ADHESIVE REQUIREMENT, OIL ABSORPTION AND GLOSS-IMPARTING QUALITY OF SAID PIGMENT, WHICH COMPRISES DIRECTING SAID PIGMENT IN RESTRICTED CONDITION INTO THE PATH OF TRAVEL OF A PERCUSSIVE MEMBER OF A ROTOR ELEMENT, SAID PIGMENT BEING IN A STATE WITH RESPECT TO LIQUID CONTENT WHICH IS IN THE RANGE EXTENDING FROM ABSENCE OF LIQUID TO A LIQUID CONTENT JUST INSUFFICIENT TO CONVERT SAID PIGMENT INTO A PASTE, SUBJECTING SAID PIGMENT TO A PERCUSSION FROM SAID PERCUSSIVE MEMBER, SAID PERCUSSIVE MEMBER HAVING A VELOCITY OF NOT LESS THAN 30 FEET PER SECOND AT THE POINT OF SAID PERCUSSION, SAID ROTOR ELEMENT AT THE TIME OF SUBJECTING SAID PIGMENT TO THE ACTION OF SAID PERCUSSIVE MEMBER BEING FREE FROM CONTACT WITH SAID PIGMENT EXCEPT IN RESPECT TO SAID PERCUSSIVE MEMBER, SAID PIGMENT BEING FREE FOR MOVEMENT UPON, AND AT THE POINT OF, SAID PERCUSSION, SAID PIGMENT BEING PROPELLED BY SAID PERCUSSIVE MEMBER OUT OF THE PATH OF TRAVEL OF SAID PERCUSSIVE MEMBER, THE PARTICLE SIZE OF SAID PIGMENT BEING SUBSTANTIALLY UNCHANGED BY SUBJECTION TO THE ACTION OF SAID PERCUSSIVE MEMBER.
Claim 2
Dependent Claim
203 words
IN THE TREATMENT OF A PIGMENT COMPRISING CALCIUM CARBONATE, THE METHOD OF MODIFYING SAID PIGMENT TO EFFECT AN IMPROVEMENT IN AT LEAST ONE OF THE PROPERTIES OF ADHESIVE REQUIREMENT, OIL ABSORPTION AND GLOSS-IMPARTING QUALITY OF SAID PIGMENT, WHICH COMPRISES DIRECTING SAID PIGMENT IN RESTRICTED CONDITION INTO THE PATH OF TRAVEL OF A PERCUSSIVE MEMBER OF A ROTOR ELEMENT, SAID PIGMENT BEING IN A STATE WITH RESPECT TO LIQUID CONTENT WHICH IS IN THE RANGE EXTENDING FROM ABSENCE OF LIQUID TO A LIQUID CONTENT JUST INSUFFICIENT TO CONVERT SAID PIGMENT INTO A PASTE, SUBJECTING SAID PIGMENT TO A PERCUSSION FROM SAID PERCUSSIVE MEMBER, SAID PERCUSSIVE MEMBER HAVING A VELOCITY OF NOT LESS THAN 30 FEET PER SECOND AT THE POINT OF SAID PERCUSSION, SAID ROTOR ELEMENT AT THE TIME OF SUBJECTING SAID PIGMENT TO THE ACTION OF SAID PERCUSSIVE MEMBER BEING FREE FROM CONTACT WITH SAID PIGMENT EXCEPT IN RESPECT TO SAID PERCUSSIVE MEMBER, SAID PIGMENT BEING FREE FOR MOVEMENT UPON, AND AT THE POINT OF, SAID PERCUSSION, SAID PIGMENT BEING PROPELLED BY SAID PERCUSSIVE MEMBER OUT OF THE PATH OF TRAVEL OF SAID PERCUSSIVE MEMBER, THE PARTICLE SIZE OF SAID PIGMENT BEING SUBSTANTIALLY UNCHANGED BY SUBJECTION TO THE ACTION OF SAID PERCUSSIVE MEMBER.
References Cited (Backward Citations)
US1711464A
Cited
US1764020A
Cited
US1872891A
Cited
US2182096A
Cited
US2210835A
Cited
US2323877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |