US1798288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrocarbons of high-boiling-point range
Assignee: IG Farbenindustrie AG
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Filing: 1928-08-23
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Granted: 1931-03-31
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Expires: 1948-08-23
Abstract
No abstract record available.
Inventors
- 👤 Wietzel Rudolf
- 👤 Speer Walter
- 👤 Kaehler Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:52
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0485; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/75; C07C2523/76; C07C2523/78; Y; Y10; Y10S; Y10S208/00; Y10S208/95; Y10S585/00; Y10S585/929; Y10S585/943
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) | 1934-03-30 | 1934-09-29 | 1935-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-03-30 | 1938-09-29 | 1939-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-03-30 | 1942-09-29 | 1943-03-31 | $7700.00 | Window Closed / Lapsed |