US2643980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a multilayer catalyst
Assignee: Individual
•
Filing: 1950-09-23
•
Granted: 1953-06-30
•
Expires: 1970-09-23
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Houdry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:29
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J37/0018; B01J37/02; B01J37/0201; B01J37/0205; Y; Y10; Y10S; Y10S502/00; Y10S502/506
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A METHOD FOR THE MANUFACTURE OF CATALYSTS WHEREIN THE QUANTITY OF CATALYTICALLY ACTIVE MATERIAL MAKING UP THE CATALYST IS BUILT UP IN A SERIES OF DEPOSITS PRODUCED BY SUCCESIVE IMPREGNATIONS WITH A LIQUID SOLUTION CONTAINING SAID CATALYTIC MATERIAL, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID SUCCESSIVE DEPOSITS, BETWEEN SAID SUCCESSIVE IMPREGNATIONS, A PROTECTIVE FILM OF NA ORGANIC MATERIAL WHICH CANNOT BE DISPLACED OR PENETRATED BY SAID SOLUTION DURING SAID IMPREGNATIONS, AND WHICH IS READILY REMOVABLE FROM SAID CATALYST BY OXIDATION.
Claim 2
Dependent Claim
81 words
IN A METHOD FOR THE MANUFACTURE OF CATALYSTS WHEREIN THE QUANTITY OF CATALYTICALLY ACTIVE MATERIAL MAKING UP THE CATALYST IS BUILT UP IN A SERIES OF DEPOSITS PRODUCED BY SUCCESIVE IMPREGNATIONS WITH A LIQUID SOLUTION CONTAINING SAID CATALYTIC MATERIAL, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID SUCCESSIVE DEPOSITS, BETWEEN SAID SUCCESSIVE IMPREGNATIONS, A PROTECTIVE FILM OF NA ORGANIC MATERIAL WHICH CANNOT BE DISPLACED OR PENETRATED BY SAID SOLUTION DURING SAID IMPREGNATIONS, AND WHICH IS READILY REMOVABLE FROM SAID CATALYST BY OXIDATION.
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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |