US2724696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of bentonitic clays
Assignee: NL Industries Inc
•
Filing: 1953-05-08
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Granted: 1955-11-22
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Expires: 1973-05-08
Abstract
No abstract record available.
Inventors
- 👤 George L Ratcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:04
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/131; Y; Y10; Y10S; Y10S507/00; Y10S507/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A COMPOSITION OF MATTER COMPRISING AN INTIMATE ADMIXTURE OF A BENTONITIC CLAY AND A WATER-SOLUBLE PERMANGANATE, SAID PERMANGANATE BEING PRESENT IN AN AMOUNT SUFFICIENT TO INCREASE THE YIELD OF SAID BENTONITIC CLAY.
Claim 2
Dependent Claim
32 words
A COMPOSITION OF MATTER COMPRISING AN INTIMATE ADMIXTURE OF A BENTONITIC CLAY AND A WATER-SOLUBLE PERMANGANATE, SAID PERMANGANATE BEING PRESENT IN AN AMOUNT SUFFICIENT TO INCREASE THE YIELD OF SAID BENTONITIC CLAY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |