US1754052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound from indene and phenols
Assignee: IG Farbenindustrie AG
•
Filing: 1927-06-22
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Granted: 1930-04-08
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Expires: 1947-06-22
Abstract
No abstract record available.
Inventors
- 👤 Rosenthal Leo
- 👤 Kropp Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:36
CPC Classifications
C; C08; C08F; C08F244/00; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C39/00; C07C39/12; C07C39/17; C08F240/00; C08G; C08G16/00; C08G16/02; C08G16/0212; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
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) | 1933-04-07 | 1933-10-07 | 1934-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-07 | 1937-10-07 | 1938-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-07 | 1941-10-07 | 1942-04-08 | $7700.00 | Window Closed / Lapsed |