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US2805207A
Expired / Lapsed
US
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Silver catalysts
Assignee: Individual
•
Filing: 1953-08-06
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Granted: 1957-09-03
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Expires: 1973-08-06
Abstract
No abstract record available.
Inventors
- 👤 Floyd J Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:50
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)
US906229A
Cited
US2444509A
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US2431427A
Cited
US2424083A
Cited
US2600444A
Cited
US2622088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |