US2449729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of industrial or power gases
Assignee: Individual
•
Filing: 1944-12-29
•
Granted: 1948-09-21
•
Expires: 1964-12-29
Abstract
No abstract record available.
Inventors
- 👤 Steinschlaeger Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:23
CPC Classifications
C; C10; C10J; C10J1/00; C10J1/213; C10G; C10G9/00; C10G9/34; C10G9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2280869A
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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) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |