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Patent US3256208A successfully refreshed from Google Patents.
US3256208A
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Process for preparing a cu-zu-cr system catalyst composition
Assignee: Japan Gas Chemical Co Inc
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Filing: 1963-04-23
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Granted: 1966-06-14
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Expires: 1983-04-23
Abstract
No abstract record available.
Inventors
- 👤 Eguchi Takashi
- 👤 Yamamoto Tamechika
- 👤 Yamauchi Saburo
- 👤 Kuraishi Michio
- 👤 Asakawa Kazuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:46
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; C; C07; C07C; C07C29/00; C07C29/15; C07C29/151; C07C29/153; C07C29/154; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE PROCESS OF MANUFACTURING A CU-ZN-CR SYSTEM CATALYST FOR METHANOL SYNTHESIS, WHICH COMPRISES FORMING A HOMOGENOUS PASTE CONSISTING ESSENTIALLY OF BASIC CUPRAMMONIUM CHROMATE WHICH HAS BEEN DECOMPOSED AT A TEMPERATURE BETWEEN 250*C. TO 700*C., AN AQUEOUS SOLUTION OF CHROMIC ACID AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE, ZINC ACETATE AND ZINC HYDROXIDE, DRYING SAID MIXTURE TO OBTAIN A DRIED PRODUCT, SHAPING SAID DRIED PRODUCT, AND REDUCING THE THUS SHAPED PRODUCT AT A TEMPERATURE FROM 170*C. TO 450*C.
Claim 2
Dependent Claim
81 words
THE PROCESS OF MANUFACTURING A CU-ZN-CR SYSTEM CATALYST FOR METHANOL SYNTHESIS, WHICH COMPRISES FORMING A HOMOGENOUS PASTE CONSISTING ESSENTIALLY OF BASIC CUPRAMMONIUM CHROMATE WHICH HAS BEEN DECOMPOSED AT A TEMPERATURE BETWEEN 250*C. TO 700*C., AN AQUEOUS SOLUTION OF CHROMIC ACID AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE, ZINC ACETATE AND ZINC HYDROXIDE, DRYING SAID MIXTURE TO OBTAIN A DRIED PRODUCT, SHAPING SAID DRIED PRODUCT, AND REDUCING THE THUS SHAPED PRODUCT AT A TEMPERATURE FROM 170*C. TO 450*C.
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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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |