US1869768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of phosphoric esters
Assignee: IG Farbenindustrie AG
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Filing: 1929-11-11
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Granted: 1932-08-02
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Expires: 1949-11-11
Abstract
No abstract record available.
Inventors
- 👤 Nicolai Fritz
- 👤 Schoenburg Curt
- 👤 Bruck Gerhard V Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:56
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/11
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) | 1935-08-02 | 1936-02-01 | 1936-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-02 | 1940-02-01 | 1940-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-02 | 1944-02-01 | 1944-08-02 | $7700.00 | Window Closed / Lapsed |