Patent US2671766A successfully refreshed from Google Patents.
US2671766A
Expired / Lapsed
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Process of producing silver surface catalysts and such catalysts
Assignee: Jefferson Chemical Co Inc
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Filing: 1951-10-01
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Granted: 1954-03-09
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Expires: 1971-10-01
Abstract
No abstract record available.
Inventors
- 👤 Donald K Sacken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
IN A PROCESS FOR PRODUCING A SILVER SURFACE CATALYST FOR CATALYZING THE OXIDATION OF OLEFINS TO OLEFIN OXIDES, THE STEPS WHICH COMPRISE CO-PRECIPITATING SILVER OXIDE AND A SILVER SALT RELATIVELY MORE WATER-SOLUBLE THAN SILVER OXIDE, REMOVING THE SAID SILVER SALT FROM THE CO-PRECIPITATE AND DEPOSITING THE RESIDUAL SILVER OXIDE ON A SUPPORT.
Claim 2
Dependent Claim
52 words
IN A PROCESS FOR PRODUCING A SILVER SURFACE CATALYST FOR CATALYZING THE OXIDATION OF OLEFINS TO OLEFIN OXIDES, THE STEPS WHICH COMPRISE CO-PRECIPITATING SILVER OXIDE AND A SILVER SALT RELATIVELY MORE WATER-SOLUBLE THAN SILVER OXIDE, REMOVING THE SAID SILVER SALT FROM THE CO-PRECIPITATE AND DEPOSITING THE RESIDUAL SILVER OXIDE ON A SUPPORT.
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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |