US2020703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved hydrocarbon products, especially lubricating oils
Assignee: IG Farbenindustrie AG
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Filing: 1933-10-23
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Granted: 1935-11-12
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Expires: 1953-10-23
Abstract
No abstract record available.
Inventors
- 👤 Schumann Curt
- 👤 Muench Eduard
- 👤 Ufer Hanns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:43
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/14; C10M2205/16; C10M2205/17; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10N; C10N2050/00; C10N2050/10
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) | 1938-11-11 | 1939-05-13 | 1939-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-11 | 1943-05-13 | 1943-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-11 | 1947-05-13 | 1947-11-12 | $7700.00 | Window Closed / Lapsed |