US2111820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl aromatic acetic acid and homologues thereof
Assignee: IG Farbenindustrie AG
•
Filing: 1935-12-09
•
Granted: 1938-03-22
•
Expires: 1955-12-09
Abstract
No abstract record available.
Inventors
- 👤 Steindorff Adolf
- 👤 Platz Carl
- 👤 Rosenbach Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:05
CPC Classifications
C; C07; C07C; C07C33/00; C07C33/18; C07C33/20; C07C51/00; C07C51/347; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1941-03-21 | 1941-09-20 | 1942-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-21 | 1945-09-20 | 1946-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-21 | 1949-09-20 | 1950-03-22 | $7700.00 | Window Closed / Lapsed |