US3014836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcined clay products
Assignee: Southern Clays Inc
•
Filing: 1957-05-01
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Granted: 1961-12-26
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Expires: 1977-05-01
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Proctor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:49
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/50; D21H21/52; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/36; C01B33/38; C01B33/40; C01B33/42; C01B33/46; C04; C04B; C04B33/00; C04B33/22; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C09; C09C; C09C1/00; C09C1/40; C09C1/42; D21H17/00; D21H17/63; D21H17/67; D21H17/68; D21H19/00; D21H19/36; D21H19/38; D21H19/385; D21H19/40; C01P; C01P2004/00; C01P2004/50; C01P2004/51; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/60; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A CALCINED KAOLIN POWDER WHOSE ABRASIVE VALUE IS IN A RANGE OF 0 TO 200 AS DETERMINED BY THE "VALLEY" METHOD, THE MINIMUM BRIGHTNESS AND WHITENESS OF SAID POWDER BEING SUBSTANTIALLY 90% OF THE BRIGHHTNESS AND WHITENESS OF MAGNESIUM OXIDE AS DETERMINED BY THE "GE" TEST, HAVING SUBSTANTIALLY AT LEAST 80% BY WEIGHT OF SAID POWDER HAVING A MAXIMUM PARTICLE SIZE OF SUBSTANTIALLY 2 MICRONS AS DETERMINED BY THE SEDIMENTATION METHOD.
Claim 2
Dependent Claim
71 words
A CALCINED KAOLIN POWDER WHOSE ABRASIVE VALUE IS IN A RANGE OF 0 TO 200 AS DETERMINED BY THE "VALLEY" METHOD, THE MINIMUM BRIGHTNESS AND WHITENESS OF SAID POWDER BEING SUBSTANTIALLY 90% OF THE BRIGHHTNESS AND WHITENESS OF MAGNESIUM OXIDE AS DETERMINED BY THE "GE" TEST, HAVING SUBSTANTIALLY AT LEAST 80% BY WEIGHT OF SAID POWDER HAVING A MAXIMUM PARTICLE SIZE OF SUBSTANTIALLY 2 MICRONS AS DETERMINED BY THE SEDIMENTATION METHOD.
References Cited (Backward Citations)
US1830934A
Cited
US1841309A
Cited
US2041721A
Cited
US2164500A
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US2297539A
Cited
US2307239A
Cited
US2339595A
Cited
US2388060A
Cited
US2524816A
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US2801183A
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US2772981A
Cited
US2900266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |