Patent CA712794A successfully refreshed from Google Patents.
US2794784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-containing catalysts
Assignee: Airco Inc
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Filing: 1953-01-21
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Granted: 1957-06-04
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Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Alio J Buselli
- 👤 Francis E Mckenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:42
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/72
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
THE METHOD OF FORMING A CATALYST FOR THE POLYMERIZATION OF ACETYLENE WHICH COMPRISES OXIDIZING THE SURFACE OF METALLIC COPPER TO FORM A LAYER OF CUPRIC OXIDE, AND REDUCING SAID CUPRIC OXIDE LAYER TO CUPROUS OXIDE WITHCARBON MONOXIDE AT A TEMPERATURE OF FROM 200 TO 500*C.
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) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |