US1972937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for effecting catalytic reactions
Assignee: Selden Co
•
Filing: 1930-03-05
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Granted: 1934-09-11
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Expires: 1950-03-05
Abstract
No abstract record available.
Inventors
- 👤 Alphons O Jaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:03
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/0285; B01J8/04; B01J8/0496; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00123; B01J2208/00168; B01J2208/00212; B01J2208/00221; B01J2208/00256; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-09-10 | 1938-03-12 | 1938-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-10 | 1942-03-12 | 1942-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-10 | 1946-03-12 | 1946-09-11 | $7700.00 | Window Closed / Lapsed |