US3345319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of extruded catalysts and catalyst supports containing polyacrylamide
Assignee: Wyeth Holdings LLC
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Filing: 1965-08-06
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Granted: 1967-10-03
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Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Colgan
- 👤 John M Witheford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:34
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD FOR EXTRUDING A HIGH SOLIDS CONTENT FEED CONTAINING AN INORGANIC OXIDE-SUPPORT MATERIAL SELECTED FROM THE GROUP CONSITIONG OF SILICA, ALUMINA, MAGNESIA AND MIXTURES THEREOF, THE IMPROVEMENT COMPRISING (1) ADMIXING (A) A POLYACRYLAMIDE HAVING A MOLECULAR WEIGHT FROM FIVE MILLION TO SIX MILION IN AN AMOUNT EFFECTIVE TO FACILITATE SAID EXTRUSION AND (B) AND EXTRUSION FEED, IN WHICH THE SOLIDS CONTENT EXCEEDS ABOUT 32% SOLIDS, AND (2) EXTRUDING SAID ADMIXTURE.
Claim 2
Independent Claim
71 words
A METHOD FOR EXTRUDING A HIGH SOLIDS CONTENT FEED CONTAINING AN INORGANIC OXIDE-SUPPORT MATERIAL SELECTED FROM THE GROUP CONSITIONG OF SILICA, ALUMINA, MAGNESIA AND MIXTURES THEREOF, THE IMPROVEMENT COMPRISING (1) ADMIXING (A) A POLYACRYLAMIDE HAVING A MOLECULAR WEIGHT FROM FIVE MILLION TO SIX MILION IN AN AMOUNT EFFECTIVE TO FACILITATE SAID EXTRUSION AND (B) AND EXTRUSION FEED, IN WHICH THE SOLIDS CONTENT EXCEEDS ABOUT 32% SOLIDS, AND (2) EXTRUDING SAID ADMIXTURE.
References Cited (Backward Citations)
US2943129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |