US2425754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen production
Assignee: STANDARD CATALYTIC CO
•
Filing: 1941-01-08
•
Granted: 1947-08-19
•
Expires: 1961-01-08
Abstract
No abstract record available.
Inventors
- 👤 Eger V Murphree
- 👤 Charles W Tyson
- 👤 Donald L Campbell
- 👤 Homer Z Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:33
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/24; C01B3/28; C01B3/32; C01B3/34; C01B3/38; C01B3/386
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1577534A
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US1799858A
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DE553037C
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USRE21526E
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US2135694A
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US2065643A
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US2231424A
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US2231231A
Cited
US2273075A
Cited
US2327175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |