US3132958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of methylene polyphenols for improving physical properties of clays and clay-containing materials and compositions resulting therefrom
Assignee: Dow Chemical Co
•
Filing: 1961-05-29
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Granted: 1964-05-12
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 John B Hemwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:29
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305; C09; C09K; C09K17/00; C09K17/14; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A COMPOSITION OF A CLAY MATERIAL OF THE GROUP CONSISTING OF CLAYS AND CLAY-CONTAINING SOILS CONTAINING AT LEAST 5 WEIGH PERCENT CLAY, DRY BASIS, AND IN ADMIXTURE THEREWITH AT LEAST 0.0025 AND UP TO 5 WEIGHT PERCENT, DRY CLAY BASIS, OF A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
45 words
THE COMPOSITON OF CLAIM 2 WHEREIN THE CLAY MATERIAL CONTAINS AT LEAST 5 WEIGHT PERCENT CLAY, DRY BASIS, AND FROM 1 TO 100 WEIGHT PERCENT OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF PORTLAND CEMENT, LIME, ASPHALTS AND SODIUM SILICATES, DRY CLAY BASIS.
References Cited (Backward Citations)
US2598234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |