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Patent US2463228A successfully refreshed from Google Patents.
US2463228A
Expired / Lapsed
US
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Silver surface catalysts and process of producing same
Assignee: Honeywell International Inc
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Filing: 1946-06-11
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Granted: 1949-03-01
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Expires: 1966-06-11
Abstract
No abstract record available.
Inventors
- 👤 West Theo John
- 👤 West James Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:29
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142948A
Cited
US2294383A
Cited
US2005645A
Cited
US2085535A
Cited
US2125333A
Cited
GB560770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |