Patent US4084782A successfully refreshed from Google Patents.
Patent US3238146A successfully refreshed from Google Patents.
US3238146A
Expired / Lapsed
US
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Catalysts and their preparation
Assignee: Shell USA Inc
•
Filing: 1960-03-21
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Granted: 1966-03-01
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 William A Hewett
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12; B; B01; B01J; B01J27/00; B01J27/06; C08F10/00; C08F4/02; C08F4/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A NEW CATALYST CONSISTING OF SMALL CRYSTALS OF AN INORGANIC METLA SALT OF A METAL HAVING AN ATOMIC WEIGHT BETWEEN 24 AND 209 AND SELECTED FROM GROUPS II,III IV, V, VII AND VIII OF THE PERIODIC TABLE OF ELEMENTS, THE ANION PORTION OF SAID SALTS BEING FREE OF OXYGEN, COATED ON THE SURFACE WITH A THIN LAYER OF FROM 1 TO 2000 MOLECULES THICK OF A DISSIMILAR METAL SALT OF THE GROUP CONSISTING OF HALIDES, SULFATES, NITRATES, SULFIDES AND CHLORATES OF A HEAVY METAL HAVING AN ATOMIC VOLUME LESS THAN 20.
Claim 2
Dependent Claim
91 words
A NEW CATALYST CONSISTING OF SMALL CRYSTALS OF AN INORGANIC METLA SALT OF A METAL HAVING AN ATOMIC WEIGHT BETWEEN 24 AND 209 AND SELECTED FROM GROUPS II,III IV, V, VII AND VIII OF THE PERIODIC TABLE OF ELEMENTS, THE ANION PORTION OF SAID SALTS BEING FREE OF OXYGEN, COATED ON THE SURFACE WITH A THIN LAYER OF FROM 1 TO 2000 MOLECULES THICK OF A DISSIMILAR METAL SALT OF THE GROUP CONSISTING OF HALIDES, SULFATES, NITRATES, SULFIDES AND CHLORATES OF A HEAVY METAL HAVING AN ATOMIC VOLUME LESS THAN 20.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |