US1898967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mixtures of nitrogen and hydrogen from bituminous fuels
Assignee: IG Farbenindustrie AG
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Filing: 1931-04-09
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Granted: 1933-02-21
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Expires: 1951-04-09
Abstract
No abstract record available.
Inventors
- 👤 Schneider Christian
- 👤 Buetefisch Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:00
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/36; C01B3/025; C01B3/48; C01B2203/00; C01B2203/02; C01B2203/0283; C01B2203/04; C01B2203/0465; C01B2203/0475; C01B2203/06; C01B2203/068; C01B2203/12; C01B2203/1205; Y; Y10; Y10S; Y10S48/00; Y10S48/04
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) | 1936-02-21 | 1936-08-22 | 1937-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-21 | 1940-08-22 | 1941-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-21 | 1944-08-22 | 1945-02-21 | $7700.00 | Window Closed / Lapsed |