Patent US3258433A successfully refreshed from Google Patents.
US3258433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supported silver catalyst composition promoted with lead
Assignee: Dow Chemical Co
•
Filing: 1963-03-22
•
Granted: 1966-06-28
•
Expires: 1983-03-22
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Lambert
- 👤 Thomas A Mcilheran Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:58
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; C22; C22C; C22C21/00; C22C21/02; H; H03; H03K; H03K5/00; H03K5/01; H03K5/08; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A SILVER CATALYST SUPPORTED ON A PROOUS WHICH CATALYST IS SUITABLE FOR OXIDIZING OLEFINS TO OLEFIN OXIDES CHARACTERIZED IN THAT THE SILVER CONTAINS FROM 160 TO 400 PARTS OF LEAD PER MILLION PARTS OF SILVER CALCULATED AS SILVER OXIDE.
Claim 2
Dependent Claim
39 words
A SILVER CATALYST SUPPORTED ON A PROOUS WHICH CATALYST IS SUITABLE FOR OXIDIZING OLEFINS TO OLEFIN OXIDES CHARACTERIZED IN THAT THE SILVER CONTAINS FROM 160 TO 400 PARTS OF LEAD PER MILLION PARTS OF SILVER CALCULATED AS SILVER OXIDE.
References Cited (Backward Citations)
US2766261A
Cited
US2005645A
Cited
US1998878A
Cited
GB402438A
Cited
US2307421A
Cited
US2458266A
Cited
US2752362A
Cited
US2805207A
Cited
US2920052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |