Patent US2068424A successfully refreshed from Google Patents.
US2068424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymerization products
Assignee: IG Farbenindustrie AG
•
Filing: 1932-12-13
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Granted: 1937-01-19
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Expires: 1952-12-13
Abstract
No abstract record available.
Inventors
- 👤 Mark Hermann
- 👤 Fikentscher Hans
- 👤 George V Susich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:37
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S260/00; Y10S260/28
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) | 1940-01-19 | 1940-07-20 | 1941-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-19 | 1944-07-20 | 1945-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-19 | 1948-07-20 | 1949-01-19 | $7700.00 | Window Closed / Lapsed |