US3755192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of catalyst tablets
Assignee: Ruhrchemie AG
•
Filing: 1972-01-20
•
Granted: 1973-08-28
•
Expires: 1992-01-20
Abstract
Abstract Production of catalyst tablets by admixing the catalyst particles, with or without substrate, with graphite and a polyethylene, polyproplene, polyethylene glycol and/or polypropylene glycol; and then tabletizing the mass.
Inventors
- 👤 W Rottig
- 👤 H Saenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:23
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J23/00; B01J23/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
Composition claimed in claim 1 wherein said graphite proportion is about 1 to 4 weight percent and said polymer proportion is about 0.3 to 1 weight percent.
Claim 2
Dependent Claim
42 words
Composition claimed in claim 1 wherein said polymer has a melting point of about 50* to 150*C; said glycol polymer has a molecular weight of about 5,000 to 20,000; and said other polymer has a molecular weight of about 10,000 to 100,000.
Claim 3
Dependent Claim
8 words
Composition claimed in claim 1 in tablet form.
Claim 4
Dependent Claim
21 words
Composition claimed in claim 1 in finely divided admixture form wherin said polymer particle size is about 1 to 1,000 microns.
Claim 5
Dependent Claim
35 words
Composition claimed in claim 5, wherein up to about 1 percent of said polymer particles are larger than 1,000 microns and up to about 10 percent of said polymer particles are larger than 500 microns.
Claim 6
Dependent Claim
19 words
A composition claimed in claim 1, wherein the catalyst portion of said composition has been reduced prior to tAbleting.
References Cited (Backward Citations)
US3051662A
Cited
US3384580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |