US2079019A
Expired / Lapsed
US
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Process for enriching blower blast with oxygen
Assignee: Union Carbide Corp
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Filing: 1935-04-03
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Granted: 1937-05-04
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Expires: 1955-04-03
Abstract
No abstract record available.
Inventors
- 👤 Karwat Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04521; F25J3/04593; F25J3/046; C; C21; C21B; C21B9/00; C21B9/16; F25J3/04527; F25J3/04551; F25J3/04557; F25J3/04624; F25J2200/00; F25J2200/02; F25J2230/00; F25J2230/50; F25J2245/00; F25J2245/50
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) | 1940-05-03 | 1940-11-02 | 1941-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-05-03 | 1944-11-02 | 1945-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-05-03 | 1948-11-02 | 1949-05-04 | $7700.00 | Window Closed / Lapsed |