US2443773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic apparatus
Assignee: Phillips Petroleum Co
•
Filing: 1942-01-27
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Granted: 1948-06-22
•
Expires: 1962-01-27
Abstract
No abstract record available.
Inventors
- 👤 Maryan P Matuszak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:06
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/0278; B01J8/0207; B01J8/0228; B01J8/06; B01J8/065; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00203; B01J2208/00265; B01J2208/00477; B01J2208/00495; B01J2208/00504; B01J2208/0053; B01J2208/00539; B01J2208/00796; B01J2208/00884; B01J2208/00893; B01J2208/0092; B01J2208/02; B01J2208/023; B01J2208/024; B01J2208/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US690062A
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US1366439A
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US1982099A
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GB435650A
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US2280081A
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US2271646A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |