US2982665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified kaolin clay
Assignee: Minerals and Chemicals Philipp Corp
•
Filing: 1957-08-16
•
Granted: 1961-05-02
•
Expires: 1977-08-16
Abstract
No abstract record available.
Inventors
- 👤 James R Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:02
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1018; C04B20/1022; Y; Y10; Y10S; Y10S71/00; Y10S71/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
KAOLIN CLAY THE PARTICLES OF WHICH ARE COATED WITH FROM 0.1 TO 4.0 PERCENT BY WEIGHT OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC ALKYLENE POLYAMINE CONTAINING AT LEAST 1 AMINE GROUP PER 4 CARBON ATOMS AND SALTS OF SAID POLYAMINE.
Claim 2
Dependent Claim
46 words
KAOLIN CLAY THE PARTICLES OF WHICH ARE COATED WITH FROM 0.1 TO 4.0 PERCENT BY WEIGHT OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC ALKYLENE POLYAMINE CONTAINING AT LEAST 1 AMINE GROUP PER 4 CARBON ATOMS AND SALTS OF SAID POLYAMINE.
References Cited (Backward Citations)
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Cited
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US2622987A
Cited
US2697699A
Cited
US2885360A
Cited
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Cited
US2867540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |