Patent US2665259A successfully refreshed from Google Patents.
US2665259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent and process for preparation thereof
Assignee: Attapulgus Minerals and Chemicals Corp
•
Filing: 1953-03-18
•
Granted: 1954-01-05
•
Expires: 1973-03-18
Abstract
No abstract record available.
Inventors
- 👤 John B Buffett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:10
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR PRODUCING AN IMPROVED ABSORBENT COMPOSITION COMPRISING MIXING A MAJOR PROPORTION OF ATTAPULGITE CLAY, WHICH HAS NOT BEEN DRIED TO A V. M. CONTENT BELOW 10%, WITH A MINOR PROPORTION, SUFFICIENT TO INCREASE THE ABSORPTIVITY OF SAID CLAY, OF A CEMENTITIOUS MATERIAL WHICH WILL YIELD A BASIC WATER EXTRACT AND SELECTED FROM THE GROUP CONSISTING OF AN ALKALINE EARTH METAL SILICATE, OXIDE, AND HYDROXIDE, IN THE PRESENCE OF SUFFICIENT WATER TO PRODUCE A MIXTURE HAVING A V. M. CONTENT OF AT LEAST 60%, AND DRYING SAID MIXTURE TO A V. M. CONTENT OF NOT MORE THAN 40%.
Claim 2
Dependent Claim
99 words
A PROCESS FOR PRODUCING AN IMPROVED ABSORBENT COMPOSITION COMPRISING MIXING A MAJOR PROPORTION OF ATTAPULGITE CLAY, WHICH HAS NOT BEEN DRIED TO A V. M. CONTENT BELOW 10%, WITH A MINOR PROPORTION, SUFFICIENT TO INCREASE THE ABSORPTIVITY OF SAID CLAY, OF A CEMENTITIOUS MATERIAL WHICH WILL YIELD A BASIC WATER EXTRACT AND SELECTED FROM THE GROUP CONSISTING OF AN ALKALINE EARTH METAL SILICATE, OXIDE, AND HYDROXIDE, IN THE PRESENCE OF SUFFICIENT WATER TO PRODUCE A MIXTURE HAVING A V. M. CONTENT OF AT LEAST 60%, AND DRYING SAID MIXTURE TO A V. M. CONTENT OF NOT MORE THAN 40%.
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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |