US2830914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium carbonate extender
Assignee: Georgia Marble Co
•
Filing: 1955-10-17
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Granted: 1958-04-15
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest C Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:28
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A READILY WATER DISPERSIBLE FILLER CONSISTING ESSENTIALLY OF CRUSHED DISCRETE CALCIUM CARBONATE PARTICLES HAVING AN AVERAGE DIAMETER RANGING FROM 2.5 TO 15 MICRONS AND BEARING A COATING FROM 0.01 TO 1% BY WEIGHT OF A POLYECTROLYTE CONSISTING OF A SODIUM SALT OF A CONDENSED ARYL SULFONIC ACID.
Claim 2
Dependent Claim
47 words
A READILY WATER DISPERSIBLE FILLER CONSISTING ESSENTIALLY OF CRUSHED DISCRETE CALCIUM CARBONATE PARTICLES HAVING AN AVERAGE DIAMETER RANGING FROM 2.5 TO 15 MICRONS AND BEARING A COATING FROM 0.01 TO 1% BY WEIGHT OF A POLYECTROLYTE CONSISTING OF A SODIUM SALT OF A CONDENSED ARYL SULFONIC ACID.
References Cited (Backward Citations)
US2295291A
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US2260826A
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US2323550A
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US2305379A
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US2668749A
Cited
US2709160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |